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{{Infobox computer
{{Infobox computer
| name   = Atari 1040STE
| name         = Atari 1040STE
| type   = Computer
| image        = [[File:Atari-1040STE.jpg|frameless|upright=1.2]]
| released= 1989 (Europe); June 1990 (United States)<ref>“STE‑Serie (520STE, 1040STE …)”, Atari‑Museum. Timeline lists first public showing at CeBIT (March 1989), Atari Messe (August 1989), retail availability in West Germany from September 1989, and U.S. availability on 2 June 1990. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
| manufacturer = Atari Corporation
| cpu     = Motorola 68000 @ 8&nbsp;MHz<ref>Atari 520/1040 STe Field Service Manual: “The STE uses the Motorola MC68000 …” (Section 2.4). ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html))</ref>
| type         = Home computer
| memory = 1&nbsp;MB standard, expandable to 4&nbsp;MB via 30‑pin SIMMs (early units sometimes used SIPPs)<ref>Atari‑Museum technical section notes SIMM/SIPP memory and 4&nbsp;MB maximum; also lists model distinctions (520/1040/4160). ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
| release date = {{Start date|1989|09}} (Europe); {{Start date|1990|06|02}} (U.S.)<ref>Shipping windows compiled from period coverage and museum research.</ref> ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))
| discontinued = 1994<ref>End-of-production window reported by the German Atari Museum project.</ref> ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))
| price        = Launch examples: DM 1,598 (West Germany, Sept. 1989); US$699 with color monitor (June 1990); typical U.S. street price fell to US$599 by Feb. 1991.<ref>Contemporaneous pricing collated from dealer brochures and museum price tables.</ref> ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))
| cpu         = Motorola MC68000 (PLCC) @ 8&nbsp;MHz<ref>Listed in the 520STE/1040STE Field Service Manual.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
| memory       = 1&nbsp;MB standard; 30‑pin SIMMs, expandable to 4&nbsp;MB (256&nbsp;KB or 1&nbsp;MB modules only; early units used SIPP).<ref>STE memory subsystem notes and SIMM/SIPP specifics.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com))
| storage      = Internal 3.5" DS/DD 720&nbsp;KB floppy; external floppy port; ACSI (DMA) external hard‑disk interface.<ref>Port/drive summary from contemporary reviews and hardware guides.</ref> ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com)) [en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
| display      = 320×200 (16 colors), 640×200 (4 colors), 640×400 mono; 4,096‑color palette; hardware fine scroll and split screen.<ref>STE graphics overview and palette expansion versus STF/M.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
| sound        = Yamaha YM2149 PSG (3 ch + noise) + 2‑channel 8‑bit stereo DMA PCM at 6.25/12.5/25/50&nbsp;kHz; LMC1992 audio control via Microwire; stereo RCA line out.<ref>DMA sample rates and LMC1992 mixer details.</ref> ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com))
| dimensions  = 475&nbsp;mm × 290&nbsp;mm × 70&nbsp;mm (W×D×H), case same footprint as late 1040STF/M.<ref>User‑measured case dimensions consistent across ST and STE shells.</ref> ([forums.atariage.com](https://forums.atariage.com/topic/134542-atari-520-ste-dimensions/?utm_source=chatgpt.com))
| weight      = ≈4.0–4.7&nbsp;kg (varies by PSU/drive revision).<ref>Typical bare‑unit masses reported by collections and sales logistics.</ref> ([computermuseum.wordpress.com](https://computermuseum.wordpress.com/2006/04/25/1040-stf/?utm_source=chatgpt.com)) [amibay.com](https://www.amibay.com/threads/atari-1040ste-4mb-ram-tos-1-62-german.2442186/?utm_source=chatgpt.com))
| os          = TOS 1.06 (“STE TOS”) or TOS 1.62 in 256&nbsp;KB (2×128&nbsp;KB) ROMs; GEM desktop.<ref>TOS versions and ROM formats for STE.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_TOS?utm_source=chatgpt.com))
| predecessor  = [[Atari 1040STFM]]
| successor    = [[Atari Mega STE]]
}}
}}


== Overview ==
The Atari 1040STE (ST Enhanced) is the late‑generation 68000‑based ST model with upgraded graphics, audio, memory subsystem, and I/O versus the earlier STf/STfm machines. It kept the integrated keyboard/CPU form factor and 8&nbsp;MHz MC68000 while adding a 4,096‑color palette, 2‑channel DMA stereo audio with on‑board filtering and mixing, SIMM‑based RAM to 4&nbsp;MB, and two side‑mounted 15‑pin enhanced joystick/analogue ports. It shipped broadly in Europe in late 1989 and reached U.S. retail on June&nbsp;2, 1990. <ref>Overview of STE enhancements and U.S. release timing.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) [atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))
The Atari 1040STE (often styled 1040ST^E or simply STE) is an enhanced member of the [[Atari ST]] family introduced in 1989 as a mid‑life update to the original ST platform. “STE” denotes “ST Enhanced.” Compared with the [[Atari 1040ST]]/STFM, the 1040STE adds a larger 4096‑color palette, a built‑in BLiTTER graphics coprocessor as standard equipment, hardware fine scrolling, stereo 8‑bit PCM “DMA sound,” two enhanced joystick/joypad ports, and easier memory expansion via SIMMs—while retaining the ST line’s familiar wedge case, TOS + [[GEM]] desktop, and hallmark MIDI I/O.<ref>General STE feature set and differences vs. ST summarized in the Atari ST article; see “ST^E” section. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref><ref>Atari 520/1040 STe Field Service Manual, chapters “Audio/Video Subsystem,” “Digitized Sound,” and “Input/Output Subsystems.” ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html))</ref> The model designation “1040” indicates a base RAM configuration of approximately one mebibyte; the STE implements this as 1&nbsp;MB on SIMM modules and can be upgraded to 4&nbsp;MB.<ref>Memory configuration and expansion via 30‑pin SIMMs/SIPPs; 4&nbsp;MB limit. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>


In Europe, the 1040STE was on sale by September 1989 following unveilings at CeBIT (March) and Atari Messe (August). U.S. retail availability followed in mid‑1990, alongside various regional bundles and price promotions.<ref>Release timeline and regional availability. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref><ref>Contemporary report on early North American pricing/availability, “Time Capsule: News — Jan.90–Mar.90.” ([atariarchives.org](https://www.atariarchives.org/cfn/12/03/0021.php?utm_source=chatgpt.com))</ref>
== Architecture and Processor ==
The 1040STE uses a socketed Motorola MC68000 (PLCC) clocked at 8&nbsp;MHz on a 16‑bit external bus (32‑bit internal ALU/regs). Support logic is consolidated into Atari‑designed ASICs: the GST MCU (combines GLUE, MMU, joystick/paddle logic, DMA‑audio addressing, clocking) and the GST Shifter (enhanced video and audio shifting). Early STE boards feature a discrete BLiTTER; later revisions integrate the blitter into the GST MCU. <ref>STE motherboard component map and GST MCU/SHIFTER roles.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com)) [forums.atariage.com](https://forums.atariage.com/topic/263950-missing-blitter-from-ste/?utm_source=chatgpt.com))


== Technical Specifications ==
Key chips commonly encountered on 1040STE boards:
The 1040STE maintains broad software compatibility with earlier STs, but exposes additional hardware for STE‑aware software. The following summarizes core specifications.
- Motorola MC68000FN8 CPU (PLCC, 8&nbsp;MHz).<ref>CPU type and packaging from the Field Service Manual.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
- Atari GST MCU: C300589 (earlier, separate BLiTTER) or C302183 (integrated BLiTTER) 144‑pin QFP.<ref>Part numbers for STE MCUs, with/without blitter.</ref> ([forums.atariage.com](https://forums.atariage.com/topic/263950-missing-blitter-from-ste/?utm_source=chatgpt.com)) [ebay.com](https://www.ebay.com/itm/163699098588?utm_source=chatgpt.com))
- Atari GST Shifter: C301712‑001 (later SMD) or C300588‑001 (earlier 84‑pin), provides 4096‑color palette and video shift; also interfaces Microwire for LMC1992 audio.<ref>GST Shifter device references.</ref> ([ataristsales.co.uk](https://www.ataristsales.co.uk/product/gst-shifter-chip-c301712-001-for-the-atari-ste-and-mega-ste/?utm_source=chatgpt.com)) [atari-forum.com](https://www.atari-forum.com/viewtopic.php?t=29116&utm_source=chatgpt.com))
- Motorola 68901 MFP (interrupt/timer/serial glue), WD1772 floppy controller, DMA controller (several revisions), Yamaha YM2149 PSG, National LMC1992 audio controller (Microwire).<ref>Part roles summarized from hardware articles and service texts.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com)) [atariarchives.org](https://www.atariarchives.org/cfn/12/05/03/0003.php?utm_source=chatgpt.com))
 
== Input/Output and Expansion ==
Rear and side panel connectivity (varies slightly by region/revision):
- RS‑232C serial (DB‑25M), Centronics parallel (DB‑25F).<ref>Standard ST family I/O retained on STE.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
- ACSI DMA port (DB‑19) for hard disks/laser printer; external floppy (14‑pin DIN).<ref>ACSI/DMA and external floppy connector formats.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
- Monitor out (13‑pin DIN) for RGB mono/color; some units retain TV/RF output in certain regions. <ref>Monitor/TV outputs on STE models reviewed at launch.</ref> ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com))
- MIDI In/Out (5‑pin DIN).<ref>ST‑series hallmark MIDI ports.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
- Two enhanced joystick/analogue ports (DB‑15F) on the left side; accept Jaguar‑style pads/analogue controllers; adapters allow two standard DE‑9 sticks per port. <ref>STE joystick port pinout and usage.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/interfaces.php?utm_source=chatgpt.com))
- Two DE‑9 mouse/joystick ports retained under the keyboard recess. <ref>Legacy ports placement description.</ref> ([pcworld.com](https://www.pcworld.com/article/511497/inside_atari_1040st.html?utm_source=chatgpt.com))
- Stereo RCA (L/R) line‑level audio outputs. <ref>STE rear‑panel stereo jacks.</ref> ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com))
 
The internal PSU is a compact switching supply providing +5&nbsp;V and +12&nbsp;V; nominal +5&nbsp;V adjustment is 5.1&nbsp;V. <ref>Power section adjustment and fuse rating in Field Service Manual.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
 
== Gallery ==
<gallery>
File:Atari-1040STE.jpg|Atari 1040STE front view (integrated keyboard chassis).
File:Atari-1040STE-ports.jpg|Rear I/O: serial, parallel, ACSI/DMA, external floppy, TV/monitor, stereo RCA.
File:Atari-1040STE-mainboard.jpg|STE mainboard (CA4003290): MC68000 (PLCC), GST MCU, GST Shifter under PSU, SIMM sockets.
</gallery>
 
== Display and Graphics ==
- Resolutions: 320×200 (16 colors), 640×200 (4 colors), 640×400 mono (SM124‑class monitor required).<ref>Resolution modes across the ST family.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
- Palette: 12‑bit (4,096 colors), with per‑scanline palette tricks enabling richer on‑screen color in demos/games.<ref>Palette expansion vs. earlier STs.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
- Hardware features: BLiTTER (standard on STE; max ~4&nbsp;MB/s moves), fine hardware scroll, split screen (via Shifter timing).<ref>BLiTTER throughput and fine‑scroll support.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
- Shifter devices: early C300588‑001 (84‑pin) and later C301712‑001 (SMD) found across board revisions. <ref>Device identities and interchangeability notes.</ref> ([atari-forum.com](https://www.atari-forum.com/viewtopic.php?t=29116&utm_source=chatgpt.com))
 
== PCB Schematics & Service Manual ==
Motherboard families and documentation useful to technicians:
 
- Common 1040STE board FABs/ASSYs
  - CA4003290 (early–mid runs; some with SIPP RAM, later SIMM), CA401177 (late, many SMD parts), and C300779‑001 Rev. 5.1 are observed in the field. <ref>Community‑maintained revision list and serial registry entries.</ref> ([temlib.org](https://temlib.org/AtariForumWiki/index.php/Atari_ST_motherboard_revisions?utm_source=chatgpt.com)) [milan.kovac.cc](https://milan.kovac.cc/atari/chipmunk/?id=1499348247&utm_source=chatgpt.com))
- Schematic set: “Atari STe Schematic Rev. A C300780‑001” (dated Oct‑3‑1989) corresponds closely to shipping 520/1040STE boards. <ref>Primary STe schematic drawings.</ref> ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com)) [elektrotanya.com](https://elektrotanya.com/atari_1040ste_c300780-001_rev.a_sch_1986.pdf/download.html?utm_source=chatgpt.com))
- Field Service Manual: “Atari 520STE/1040STE Field Service Manual” covers both models; PSU trim, theory of operation, diagnostics, flowcharts. <ref>Manual availability and scope.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))


{| class="wikitable"
{| class="wikitable"
! colspan="2" | System
! Board/FAB (marking) !! Typical features !! Matching schematic docs
|-
|-
! CPU
| CA4003290 || Early “beta” and revised runs; some SIPP sockets; discrete BLiTTER; later sub‑runs add integrated‑BLiTTER MCU || C300780‑001 Rev.A STe schematic set
| Motorola 68000 (16/32‑bit CISC), 8&nbsp;MHz (socketed PLCC on STE mainboard).<ref>CPU and packaging change noted in STE coverage; also see Atari‑Museum chip descriptions. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) [atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
|-
|-
! Chipset (selected)
| C300779‑001 Rev. 5.1 || Late ’89/’90 production; SIMM RAM; frequent DMA chip updates || C300780‑001 Rev.A; field addenda
| • BLiTTER (block image transfer) coprocessor, standard on STE (max practical write rate circa 4&nbsp;MB/s).<ref>BLiTTER standard on STE and quoted fill rate. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref><br>• Shifter video generator with extended 12‑bit palette (4096 colors).<ref>STE 4096‑color palette vs. 512 on ST. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref><br>• GSTMCU (combined GLUE/MMU), DMA controller, WD1772 floppy controller, YM2149F PSG, LMC1992 analog audio controller.<ref>Chip set list and roles. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
|-
|-
! RAM
| CA401177 || Late SMD‑heavy run; BLiTTER in MCU; surface‑mount 68000, Shifter || C300780‑001 Rev.A + rev notes
| 1&nbsp;MB standard; 30‑pin SIMM sockets (early SIPP), expandable to 4&nbsp;MB in paired modules.<ref>SIMM/SIPP arrangement and capacities. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
|-
! ROM / OS
| TOS 1.06 (“STE TOS”) initially, quickly superseded by TOS 1.62 (bug‑fix release); later upgrades to TOS 2.06 were possible.<ref>TOS version matrix listing 1.06 (ROM 29‑Jul‑1989) and 1.62 (1‑Jan‑1990) for 520/1040STE; 2.06 as later ST/STE upgrade. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_TOS?utm_source=chatgpt.com))</ref>
|-
! Mass storage
| Internal 3.5‑inch DS‑DD floppy drive (720&nbsp;KB nominal); external second floppy via 14‑pin DIN; hard disks via ACSI (DMA) port with appropriate host adapter.<ref>DS‑DD 720&nbsp;KB floppy and external drive; ACSI “hard disk” DMA port. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm)) [en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref>
|}
|}


== Memory and Storage ==
- DRAM: Four 30‑pin SIMM sockets (some early units shipped SIPP). Accept 256&nbsp;KB or 1&nbsp;MB 8‑bit modules (with/without parity). Supported capacities: 1, 2, or 4&nbsp;MB; 2.5&nbsp;MB is possible but has compatibility caveats. Recommended speeds: 150&nbsp;ns (256&nbsp;KB) and 120&nbsp;ns (1&nbsp;MB). <ref>STE SIMM/SIPP guidance and timing requirements.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com))
- ROM: Two socketed 128&nbsp;KB ROMs (27C010 class) carrying TOS 1.06 or 1.62; upgrades and multi‑TOS switchers are common. <ref>TOS formats and upgrade practice.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_TOS?utm_source=chatgpt.com)) [ultradevtools.de](https://www.ultradevtools.de/ultraTos.html?utm_source=chatgpt.com))
- Floppy: Internal 3.5" DS/DD 720&nbsp;KB; external 14‑pin DIN port allows second drive; HD (1.44&nbsp;MB) available only via later mods/kits. <ref>Stock floppy capabilities and external port.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
- Mass storage: ACSI (DB‑19) hard disks; modern SD‑based ACSI devices (e.g., UltraSatan) rely on healthy DMA silicon (see DMA notes below). <ref>ACSI usage and DMA chip caveats on some STEs.</ref> ([forums.atariage.com](https://forums.atariage.com/topic/211660-buggy-dma-chip/?utm_source=chatgpt.com))
== Related Pages ==
- [[Atari 1040STE General Maintenance]]
- [[Atari 1040STE Troubleshooting Guide]]
- [[Atari 1040STE Capacitor Replacement Guide]]
- [[Atari ST and STE RAM Upgrade Guide]]
- [[Atari STE DMA Port & Hard‑Disk Guide]]
== Sound Capabilities ==
In addition to the YM2149 PSG (3 tones + noise), the STE adds 2‑channel 8‑bit PCM playback via DMA, at selectable nominal rates of 6,258/12,517/25,033/50,066&nbsp;Hz (mono or stereo). Audio is mixed and equalized by an LMC1992 controlled over the Microwire serial interface exposed by the Shifter; bass/treble and master/left/right levels are software‑settable. The STE also routes mixed audio to both the built‑in monitor mono output and to rear‑panel stereo RCA jacks. <ref>DMA registers/rates and LMC1992 control model.</ref> ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com)) [mikrosk.github.io](https://mikrosk.github.io/doitarchive/doit_st/0309.htm?utm_source=chatgpt.com))
Tech note: Many units ship with PSG/DMA level imbalance (PSG “hotter”). Hardware and software adjustments are documented by the scene and repair community for achieving near‑1:1 mix when required. <ref>Documented Microwire mix corrections and best‑practice settings.</ref> ([atari.8bitchip.info](https://atari.8bitchip.info/STEamFix.html?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com))
== General Maintenance ==
- PSU: Recap original switchers (DVE/Mitsumi etc.) and set +5&nbsp;V at ≈5.10&nbsp;V under load; replace the 2&nbsp;A fuse only after root‑cause analysis. <ref>PSU calibration guidance.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
- Mainboard electrolytics: Replace aging caps on CA4003290/CA401177 boards; vetted lists exist for STE cap kits. <ref>Consolidated capacitor lists for STE PCB variants.</ref> ([wiki.console5.com](https://wiki.console5.com/wiki/Atari_ST?utm_source=chatgpt.com)) [console5.com](https://console5.com/store/atari-520ste-1040ste-computer-cap-kit-main-ste-pcb.html?utm_source=chatgpt.com))
- Floppy: Clean/lubricate rails; verify write‑protect and track‑0 sensors; re‑align only with proper disks/tools.
- RAM: Use matched SIMM pairs; avoid 2&nbsp;MB/4&nbsp;MB 30‑pin modules which are not supported by the stock MMU design. <ref>Supported SIMM sizes and speeds.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com))
For full procedures see [[Atari 1040STE General Maintenance]].
== Technical Details ==
{| class="wikitable"
{| class="wikitable"
! colspan="2" | Video and Audio
! Subsystem !! Device(s) / notes
|-
|-
! Video modes
| CPU || Motorola MC68000 (PLCC) @ 8&nbsp;MHz; socketed on most boards. <ref>CPU packaging and speed.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
| ST‑Low 320×200 (16 colors), ST‑Medium 640×200 (4 colors), ST‑High 640×400 (mono with SM124/SM147 monitor).<ref>Standard ST/STE resolutions and color depths. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref>
|-
|-
! Palette
| System ASICs || GST MCU (C300589 early, C302183 later with integrated BLiTTER); GST Shifter (C301712‑001/C300588‑001). <ref>Part numbers and integration notes.</ref> ([forums.atariage.com](https://forums.atariage.com/topic/263950-missing-blitter-from-ste/?utm_source=chatgpt.com)) [atari-forum.com](https://www.atari-forum.com/viewtopic.php?t=29116&utm_source=chatgpt.com))
| 12‑bit RGB (4096 total), with the usual ST limits on simultaneously displayed colors per mode; hardware fine scrolling added on STE.<ref>4096‑color palette and hardware scrolling. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref>
|-
|-
! Genlock support
| Blitter || Discrete BLiTTER on early boards; ~4&nbsp;MB/s block moves; later integrated into MCU. <ref>BLiTTER presence and throughput.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
| External sync support provided; STE allows clock injection without internal modification to facilitate genlock setups.<ref>Service manual section “Genlock and the STE.” ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?page=15))</ref>
|-
|-
! Sound (PSG)
| Memory || 4× 30‑pin SIMM sockets (or SIPP on earliest); 1–4&nbsp;MB official configurations. <ref>Memory sockets and limits.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com))
| Yamaha YM2149F/AY‑3‑8910 compatible, 3 tone + noise channels (as on earlier STs).<ref>PSG details. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
|-
|-
! Sound (DMA)
| Audio || YM2149 PSG + 2‑ch DMA PCM (8‑bit) via Shifter; LMC1992 mixer/EQ (Microwire). <ref>DMA and Microwire chain.</ref> ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com))
| Two‑channel 8‑bit PCM (“DMA sound”) at approx. 6.25/12.5/25/50&nbsp;kHz; stereo RCA line‑outs on rear panel; mixed with PSG and monitor audio. Samples are signed and may be mono or interleaved stereo.<ref>Sampling rates, signed samples, mixing path, and RCA outputs described in service manual and Atari Compendium. ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?page=15)) [bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com))</ref>
|}
 
{| class="wikitable"
! colspan="2" | I/O and expansion
|-
|-
! Rear/side I/O
| I/O || RS‑232 (DB‑25M), Centronics (DB‑25F), ACSI DMA (DB‑19), external floppy (14‑pin DIN), monitor (13‑pin DIN), 2× MIDI, 2× DB‑15 enhanced joystick, 2× DE‑9 mouse/joystick. <ref>Panel I/O inventory.</ref> ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com)) [info-coach.fr](https://info-coach.fr/atari/hardware/interfaces.php?utm_source=chatgpt.com))
| 13‑pin monitor (RGB/mono), stereo RCA audio out (L/R), 19‑pin ACSI/DMA (hard disks, laser printers), RS‑232C (DB‑25M), Centronics printer (DB‑25F), MIDI In/Out (5‑pin DIN), external floppy (14‑pin DIN), cartridge port, power inlet. Some regional units also provided TV output via internal modulator.<ref>Port roster; stereo RCA outputs; ACSI; monitor port; and note on television output in certain markets. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm)) [manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?page=15))</ref>
|-
|-
! Input devices
| FDD || WD1772 controller; 3.5" DS/DD 720&nbsp;KB internal. <ref>WD1772 use on STE.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com))
| Integrated keyboard; 2 standard DE‑9 mouse/joystick ports retained; 2 Enhanced Joystick Ports (EJPs) using 15‑pin “Jagpad‑style” connectors, supporting multi‑button pads, paddles, light pens; electrically compatible with later [[Atari Jaguar]] controllers.<ref>Enhanced 15‑pin joystick/joypad pinout and supported devices on STE/Falcon/Jaguar. ([allpinouts.org](https://allpinouts.org/pinouts/connectors/input_device/joystick-atari-enhanced-15-pin/?utm_source=chatgpt.com))</ref>
|-
! Memory expansion
| User‑replaceable 30‑pin SIMMs (paired); typical configurations 1, 2, or 4&nbsp;MB. Early boards sometimes fitted with pin‑based SIPPs.<ref>SIMM/SIPP and upgrade options. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
|}
|}


== History ==
== System Architecture at a Glance ==
Atari previewed the STE hardware to the trade press at CeBIT (Hannover) in March 1989 and introduced it publicly at the August 1989 Atari Messe in Düsseldorf. Retail sales began in West Germany in September 1989, followed by other European territories through late 1989 and early 1990. In the United States the 1040STE reached retail in mid‑1990, with typical bundles advertised below US$800 including a color monitor.<ref>Chronology and pricing indicators: Atari‑Museum STE page (CeBIT/Atari Messe dates; European and U.S. availability) and contemporary North American commentary on availability and “street price.” ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm)) [atariarchives.org](https://www.atariarchives.org/cfn/12/03/0021.php?utm_source=chatgpt.com))</ref>
- MC68000 8&nbsp;MHz core; 24‑bit address space (16&nbsp;MB).
- GST MCU handles DRAM multiplexing, decode, DMA hand‑off, joystick/paddle and timing.
- GST Shifter fetches bitplanes and clocks RGB; exposes Microwire to the LMC1992 and manages DMA‑audio shift.
- BLiTTER accelerates block copies/fills.
- MFP 68901 provides timers/interrupt aggregation; ACIA 6850s handle MIDI and keyboard links.
- DMA port (ACSI) arbitrates CPU/disk transfers. <ref>Consolidated STE block‑level description.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com))


The aim of the STE refresh was to shore up the ST’s multimedia credentials relative to rivals like the [[Amiga 500]], without breaking compatibility with the large installed base of ST software and peripherals. Accordingly, Atari kept resolution limits and screen formats unchanged, but expanded the palette to 4096 colors, standardized the BLiTTER, added hardware scrolling, and introduced stereo PCM audio and front‑accessible enhanced controller ports. Memory expansion moved to commodity SIMMs/SIPPs, making upgrades far simpler than on most STF/STFM boards.<ref>Hardware additions and palette; memory change; controller ports. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) [atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
== Apple Service Manual ==
This section header is retained for template consistency; Atari 1040STE documentation is covered instead by the official 520/1040STE Field Service Manual and STe schematics listed below. <ref>Atari, not Apple, publishes the applicable service literature.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))


Initial STE units shipped with TOS 1.06 (also known as TOS 1.6), a ROM build specific to STE hardware. A widely encountered desktop bug in 1.06 led Atari to release TOS 1.62 in early 1990; many systems were updated in the field, and later runs shipped with 1.62 from the factory. Enthusiasts later upgraded many STEs to TOS 2.06, adding modest UI enhancements and better hard‑disk/HD‑floppy support.<ref>TOS 1.06/1.62 details, dates, and notes on 2.06. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_TOS?utm_source=chatgpt.com))</ref>
== Logic Board & Analog Board Schematics ==
The 1040STE is a single main logic board plus a separate PSU (no discrete “analog board” as on Apple compacts). Use:
- Atari STe Schematic Rev. A (C300780‑001, 1989‑10‑03). <ref>Primary schematic set for 520/1040STE.</ref> ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com))
- 520/1040STE Field Service Manual (diagnostics, PSU trim, theory). <ref>Field servicing content and procedures.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))


Atari produced the 520STE (512&nbsp;KB base RAM in some markets) and 1040STE (1&nbsp;MB) as the mainstream models; a 4160STE (4&nbsp;MB) existed in small numbers primarily for developers, and dealer‑labeled “2080STE/4160STE” bundles occasionally appeared to denote fitted RAM. Production of 1040STE continued into the early 1990s alongside the [[Mega STe]] (1991) and until the line’s effective replacement by the [[Atari Falcon030|Falcon&nbsp;030]] in 1992–1993.<ref>STE model variants and production notes. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
== Troubleshooting ==
Common STE failure modes and pointers:
- No boot/white or checker screen: reseat PLCC CPU and Shifter; verify +5&nbsp;V = 5.10&nbsp;V; try known‑good SIMMs in bank order (1/3); run a diagnostic cartridge if available. <ref>Community triage tactics; RAM isolation and reseat advice.</ref> ([forums.atariage.com](https://forums.atariage.com/topic/283468-1040ste-wont-boot-help-needed/?utm_source=chatgpt.com))
- Floppy errors: clean heads, verify WD1772 clock, check drive select and write‑protect sensors.
- ACSI hard‑disk issues: certain early DMA chips (e.g., C025913‑38) are marginal; Atari and community fixes improve bus hand‑off (pull‑up changes, small timing caps); later C398739‑001A silicon is preferred. <ref>Known “DMA bug” history and mitigation.</ref> ([exxosforum.co.uk](https://exxosforum.co.uk/atari/last/DMASG/index.htm?utm_source=chatgpt.com)) [forums.atariage.com](https://forums.atariage.com/topic/211660-buggy-dma-chip/?utm_source=chatgpt.com))
- Audio imbalance/distortion: adjust LMC1992 in software (reduce master volume a few dB) or apply documented Microwire/PSG level fix for proper DMA/PSG mix. <ref>Microwire programming and hardware correction notes.</ref> ([alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com)) [atari.8bitchip.info](https://atari.8bitchip.info/STEamFix.html?utm_source=chatgpt.com))


== Software ==
== 🧠 Architecture and Processor ==
Like earlier STs, the 1040STE boots [[Atari TOS]] into the GEM desktop from ROM, with typical bundled tools and a “desktop accessories” mechanism. The principal STE‑specific OS releases were TOS 1.06 and 1.62, with the latter correcting early bugs; TOS 2.06, though not an original factory standard on most 1040STEs, became a popular end‑user ROM upgrade.<ref>TOS version timeline for STE models. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_TOS?utm_source=chatgpt.com))</ref>
Deep‑dive register highlights for repair and testing:
- DMA sound control block at $FF8900–$FF8920: set mode (mono/stereo), rate (6.25–50&nbsp;kHz), base/end addresses, and looping. <ref>Register map and recommended programming sequence for playback.</ref> ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com))
- LMC1992 Microwire writes via $FF8922/$FF8924; 11‑bit transactions (addr+data). <ref>Microwire timing, masks, and command format.</ref> ([mikrosk.github.io](https://mikrosk.github.io/doitarchive/doit_st/0309.htm?utm_source=chatgpt.com))
- BLiTTER present flag and speed: use desktop “Blitter” option or query $FFFF8A00 series (model‑dependent). <ref>Presence and configuration checks.</ref> ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))


Because the STE preserved the ST’s resolutions and per‑mode color limits, most general‑purpose ST applications ran unmodified. STE‑aware programs, however, could exploit the BLiTTER, hardware scrolling, extended palette, and DMA sound. A few notable commercial titles were written for or significantly enhanced on STE hardware:
== Technical Documentation ==
* Obsession (1994) – a high‑end pinball simulation built specifically for the STe, often cited for its smooth scrolling and audio; later ported to the Amiga.<ref>Obsession development and reception; original release 2 December 1994 for Atari STe. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Obsession_%28video_game%29?utm_source=chatgpt.com))</ref>
- [[Atari 520STE/1040STE Field Service Manual]] (theory, diagnostics, PSU adjustment). <ref>Manual sources and scanned copies.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
* Substation (1995) – first‑person shooter for STe (and Falcon), among the platform’s late‑era 3D showcases.<ref>Substation platform and release information. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Substation_%28video_game%29?utm_source=chatgpt.com))</ref>
- [[Atari 1040STE Schematics (C300780‑001 Rev.A)]] (Oct‑3‑1989). <ref>Schematics hosted by preservation sites.</ref> ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com)) [archive.org](https://archive.org/details/Atari_1040STe_Schematic_1986_Atari?utm_source=chatgpt.com))
* Stardust (1994 STe release) – an STe‑targeted conversion of Bloodhouse’s Amiga blaster, distributed on the ST as an STe‑only title using the machine’s hardware features.<ref>Stardust STe release notes (1994/1995) and STe/Falcon targeting. ([mobygames.com](https://www.mobygames.com/game/13043/stardust/releases/?utm_source=chatgpt.com)) [atariuptodate.de](https://www.atariuptodate.de/en/7098/stardust?utm_source=chatgpt.com))</ref>
- [[Atari Compendium – Hardware Reference]] (DMA sound registers, system programming). <ref>Compendium hardware chapters.</ref> ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com))
- [[STE Hardware Description (Info‑Coach)]] (chip roles, LMC1992 and GST ASIC details). <ref>STE hardware overview and translations of ST Magazine technical articles.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com))
- [[Atari ST Interfaces and Connectors (Info‑Coach)]] (pinouts for STE DB‑15 joystick and audio). <ref>Connector pinouts and port usage.</ref> ([info-coach.fr](https://info-coach.fr/atari/hardware/interfaces.php?utm_source=chatgpt.com))


On the productivity side, the ST line’s most enduring cultural impact was in music. [[Cubase]] (Steinberg, 1989) debuted on the ST platform and remained a studio staple; many composers and producers adopted [[Atari ST]]s (and later STEs) for MIDI sequencing, taking advantage of the machine’s built‑in DIN MIDI ports and stable timing. [[Creator (software)|Creator]]/[[Notator]] from C‑Lab/Emagic likewise originated on the ST and evolved into Logic.<ref>Cubase history: first release on Atari ST (1989). ([en.wikipedia.org](https://en.wikipedia.org/wiki/Cubase?utm_source=chatgpt.com))</ref><ref>Emagic lineage from C‑Lab Creator/Notator on Atari ST to Logic/Notator Logic. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Emagic?utm_source=chatgpt.com))</ref>
=== Notes on dimensions and mass ===
Case dimensions for the 1040‑style chassis are approximately 475×290×70&nbsp;mm, consistent with user measurements and museum entries for 1040STF/M/STE shells; bare unit weights vary across revisions and drive/PSU vendors (≈4.0–4.7&nbsp;kg). <ref>Dimension and weight observations from museum sources and shipping reports.</ref> ([forums.atariage.com](https://forums.atariage.com/topic/134542-atari-520-ste-dimensions/?utm_source=chatgpt.com)) [computermuseum.wordpress.com](https://computermuseum.wordpress.com/2006/04/25/1040-stf/?utm_source=chatgpt.com)) [amibay.com](https://www.amibay.com/threads/atari-1040ste-4mb-ram-tos-1-62-german.2442186/?utm_source=chatgpt.com))


Demoscene productions and public‑domain/shareware games often led the way in exploiting STE‑only features (e.g., DMA audio at 50&nbsp;kHz and extended palette tricks), and later “STE‑fix” patches for classic ST games became common community projects. Nonetheless, the number of commercial releases that required an STE remained modest compared to the broader ST catalog, reflecting the smaller installed base of STE machines relative to earlier STs.<ref>Assessment of STE‑specific commercial software volume relative to overall ST catalog. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref>
=== Motherboard revisions (service reference) ===
Common field sightings include CA4003290 (early/mid), C300779‑001 Rev.5.1, and CA401177 (late SMD) with combinations of discrete/integrated BLiTTER and SIPP/SIMM RAM hardware. <ref>Community rev lists and serial database entries corroborating board IDs.</ref> ([temlib.org](https://temlib.org/AtariForumWiki/index.php/Atari_ST_motherboard_revisions?utm_source=chatgpt.com)) [milan.kovac.cc](https://milan.kovac.cc/atari/chipmunk/?id=1499348247&utm_source=chatgpt.com))


== Legacy ==
== PCB Schematics & Service Guide ==
The 1040STE occupies a distinctive place in Atari’s 16‑bit lineage. Technically, it is the most capable “classic” ST in the integrated keyboard case, with standard stereo DMA audio, BLiTTER, and the extended palette while remaining largely compatible with earlier software and peripherals. Its hardware served as a bridge toward the semi‑professional [[Mega STe]] and multimedia‑oriented [[Atari Falcon030]], both of which retained and expanded on STE concepts (e.g., DMA audio, enhanced controllers).<ref>Lineage from STE to Mega STe and Falcon 030; shared concepts and enhancements. ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap1.htm?utm_source=chatgpt.com)) [en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref>
- Assembly/FAB identifiers: CA4003290 (early/mid), C300779‑001 Rev.5.1 (1989‑1990), CA401177 (late). <ref>See also cap lists keyed to board markings for recapping jobs.</ref> ([wiki.console5.com](https://wiki.console5.com/wiki/Atari_ST?utm_source=chatgpt.com))
- Schematic mapping table is provided above; use C300780‑001 Rev.A set as baseline, plus field addenda as encountered. <ref>Multiple hosts mirror the same Rev.A package; verify sheet dates.</ref> ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com))


Within retro‑computing, the STE remains desirable for music sequencing (thanks to built‑in MIDI and stable timing), for STe‑targeted games and demos, and as a flexible base for upgrades. Common modern additions include solid‑state ACSI storage adapters, floppy emulators, and TOS ROM upgrades, as well as RAM and CPU accelerators; the SIMM‑based memory architecture makes maintenance comparatively straightforward.<ref>General legacy usage patterns; upgrade culture and storage adapters are widely documented across Atari community resources; SIMM‑based memory noted in contemporary and museum documentation. ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm))</ref>
=== Service manual and schematics (quick links) ===
- [[Atari 520/1040STE Field Service Manual]] (PSU 5.1&nbsp;V calibration, fault trees). <ref>Manualslib mirror; Best Electronics print copies.</ref> ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com)) [best-electronics-ca.com](https://www.best-electronics-ca.com/service_.htm?utm_source=chatgpt.com))
- [[1040STE Schematic (C300780‑001 Rev. A, 1989)]] (Internet Archive/Yumpu mirrors). <ref>Schematic sets and dates.</ref> ([archive.org](https://archive.org/details/Atari_1040STe_Schematic_1986_Atari?utm_source=chatgpt.com)) [yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com))


=== Design assessment and compatibility ===
----
Atari’s choice to avoid new display modes helped preserve compatibility but limited visible differentiation in many titles versus earlier STs. Where developers took advantage of the BLiTTER, fine scrolling, and DMA audio, STE software could look and sound substantially better than ST‑only versions. Conversely, some early software that accessed ST color registers directly ran poorly on unpatched TOS 1.06 machines until either program updates or the TOS 1.62 ROM became standard.<ref>Compatibility considerations: unchanged resolutions, extended palette, and TOS 1.06 bugs fixed by 1.62. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref>


== Notes on connectors and controls ==
References
The STE adds two Enhanced Joystick Ports using 15‑pin high‑density connectors, mechanically and electrically compatible with later [[Atari Jaguar]] “JagPad” controllers and supporting analog paddles and lightpen devices. Adapters allow two standard DE‑9 controllers per EJP, in addition to the two traditional under‑keyboard DE‑9 ports.<ref>Enhanced 15‑pin ports: presence on STE, Falcon, Jaguar; pinout and supported peripherals. ([allpinouts.org](https://allpinouts.org/pinouts/connectors/input_device/joystick-atari-enhanced-15-pin/?utm_source=chatgpt.com))</ref> Rear‑panel stereo RCA outputs carry the mixed DMA audio and PSG signals; audio processing (master/left/right volume, bass/treble EQ) is handled by a National LMC1992 under the GSTMCU’s Microwire control.<ref>Service manual description of audio path and LMC1992 role. ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?page=15))</ref> As with earlier STs, RGB/mono video is provided on a 13‑pin DIN, and hard‑disk peripherals connect via the 19‑pin ACSI/DMA port.<ref>Port descriptions. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))</ref>
<references />


== See also ==
Categories:
* [[Atari ST]] • [[Mega STe]] • [[Atari Falcon030]]
[[Category:Computers]]
* [[Atari TOS]] • [[GEM]] • [[Motorola 68000]]
[[Category:Home computers]]
* [[MIDI]] on the ST platform; [[Cubase]]; [[Notator]]
[[Category:Atari ST]]


== References ==
<references/>


[[Category:Computers]]
Editorial note on the “infobox” request and section names: The values supplied in the user’s template (e.g., Apple‑specific data) do not match the Atari 1040STE and would be factually incorrect if reproduced. This page therefore provides a complete, accurate “infobox computer” for the 1040STE. Likewise, Apple‑specific section titles are retained for structural compatibility, but the content points to the correct Atari service literature.
[[Category:Home computers]]
[[Category:Motorola 68000-based computers]]
[[Category:Atari ST family]]

Revision as of 19:15, 12 August 2025

Atari 1040STE
File:Atari-1040STE.jpg
Specifications
ManufacturerAtari Corporation
TypeHome computer
ReleasedSeptember 1, 1989 (Europe); June 2, 1990 (U.S.)[1] ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))
Discontinued1994[2] ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))
Intro priceLaunch examples: DM 1,598 (West Germany, Sept. 1989); US$699 with color monitor (June 1990); typical U.S. street price fell to US$599 by Feb. 1991.[3] ([atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))
CPUMotorola MC68000 (PLCC) @ 8 MHz[4] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
Memory1 MB standard; 30‑pin SIMMs, expandable to 4 MB (256 KB or 1 MB modules only; early units used SIPP).[5] ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com))
StorageInternal 3.5" DS/DD 720 KB floppy; external floppy port; ACSI (DMA) external hard‑disk interface.[6] ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com)) [en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
Display320×200 (16 colors), 640×200 (4 colors), 640×400 mono; 4,096‑color palette; hardware fine scroll and split screen.[7] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
SoundYamaha YM2149 PSG (3 ch + noise) + 2‑channel 8‑bit stereo DMA PCM at 6.25/12.5/25/50 kHz; LMC1992 audio control via Microwire; stereo RCA line out.[8] ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com))
Dimensions475 mm × 290 mm × 70 mm (W×D×H), case same footprint as late 1040STF/M.[9] ([forums.atariage.com](https://forums.atariage.com/topic/134542-atari-520-ste-dimensions/?utm_source=chatgpt.com))
Weight≈4.0–4.7 kg (varies by PSU/drive revision).[10] ([computermuseum.wordpress.com](https://computermuseum.wordpress.com/2006/04/25/1040-stf/?utm_source=chatgpt.com)) [amibay.com](https://www.amibay.com/threads/atari-1040ste-4mb-ram-tos-1-62-german.2442186/?utm_source=chatgpt.com))
OS / FirmwareTOS 1.06 (“STE TOS”) or TOS 1.62 in 256 KB (2×128 KB) ROMs; GEM desktop.[11] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_TOS?utm_source=chatgpt.com))
PredecessorAtari 1040STFM
SuccessorAtari Mega STE

The Atari 1040STE (ST Enhanced) is the late‑generation 68000‑based ST model with upgraded graphics, audio, memory subsystem, and I/O versus the earlier STf/STfm machines. It kept the integrated keyboard/CPU form factor and 8 MHz MC68000 while adding a 4,096‑color palette, 2‑channel DMA stereo audio with on‑board filtering and mixing, SIMM‑based RAM to 4 MB, and two side‑mounted 15‑pin enhanced joystick/analogue ports. It shipped broadly in Europe in late 1989 and reached U.S. retail on June 2, 1990. [12] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) [atarimuseum.info](https://www.atarimuseum.info/1040ste.htm?utm_source=chatgpt.com))

Architecture and Processor

The 1040STE uses a socketed Motorola MC68000 (PLCC) clocked at 8 MHz on a 16‑bit external bus (32‑bit internal ALU/regs). Support logic is consolidated into Atari‑designed ASICs: the GST MCU (combines GLUE, MMU, joystick/paddle logic, DMA‑audio addressing, clocking) and the GST Shifter (enhanced video and audio shifting). Early STE boards feature a discrete BLiTTER; later revisions integrate the blitter into the GST MCU. [13] ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com)) [forums.atariage.com](https://forums.atariage.com/topic/263950-missing-blitter-from-ste/?utm_source=chatgpt.com))

Key chips commonly encountered on 1040STE boards: - Motorola MC68000FN8 CPU (PLCC, 8 MHz).[14] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com)) - Atari GST MCU: C300589 (earlier, separate BLiTTER) or C302183 (integrated BLiTTER) 144‑pin QFP.[15] ([forums.atariage.com](https://forums.atariage.com/topic/263950-missing-blitter-from-ste/?utm_source=chatgpt.com)) [ebay.com](https://www.ebay.com/itm/163699098588?utm_source=chatgpt.com)) - Atari GST Shifter: C301712‑001 (later SMD) or C300588‑001 (earlier 84‑pin), provides 4096‑color palette and video shift; also interfaces Microwire for LMC1992 audio.[16] ([ataristsales.co.uk](https://www.ataristsales.co.uk/product/gst-shifter-chip-c301712-001-for-the-atari-ste-and-mega-ste/?utm_source=chatgpt.com)) [atari-forum.com](https://www.atari-forum.com/viewtopic.php?t=29116&utm_source=chatgpt.com)) - Motorola 68901 MFP (interrupt/timer/serial glue), WD1772 floppy controller, DMA controller (several revisions), Yamaha YM2149 PSG, National LMC1992 audio controller (Microwire).[17] ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com)) [atariarchives.org](https://www.atariarchives.org/cfn/12/05/03/0003.php?utm_source=chatgpt.com))

Input/Output and Expansion

Rear and side panel connectivity (varies slightly by region/revision): - RS‑232C serial (DB‑25M), Centronics parallel (DB‑25F).[18] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) - ACSI DMA port (DB‑19) for hard disks/laser printer; external floppy (14‑pin DIN).[19] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) - Monitor out (13‑pin DIN) for RGB mono/color; some units retain TV/RF output in certain regions. [20] ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com)) - MIDI In/Out (5‑pin DIN).[21] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) - Two enhanced joystick/analogue ports (DB‑15F) on the left side; accept Jaguar‑style pads/analogue controllers; adapters allow two standard DE‑9 sticks per port. [22] ([info-coach.fr](https://info-coach.fr/atari/hardware/interfaces.php?utm_source=chatgpt.com)) - Two DE‑9 mouse/joystick ports retained under the keyboard recess. [23] ([pcworld.com](https://www.pcworld.com/article/511497/inside_atari_1040st.html?utm_source=chatgpt.com)) - Stereo RCA (L/R) line‑level audio outputs. [24] ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com))

The internal PSU is a compact switching supply providing +5 V and +12 V; nominal +5 V adjustment is 5.1 V. [25] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))

Display and Graphics

- Resolutions: 320×200 (16 colors), 640×200 (4 colors), 640×400 mono (SM124‑class monitor required).[26] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) - Palette: 12‑bit (4,096 colors), with per‑scanline palette tricks enabling richer on‑screen color in demos/games.[27] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) - Hardware features: BLiTTER (standard on STE; max ~4 MB/s moves), fine hardware scroll, split screen (via Shifter timing).[28] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) - Shifter devices: early C300588‑001 (84‑pin) and later C301712‑001 (SMD) found across board revisions. [29] ([atari-forum.com](https://www.atari-forum.com/viewtopic.php?t=29116&utm_source=chatgpt.com))

PCB Schematics & Service Manual

Motherboard families and documentation useful to technicians:

- Common 1040STE board FABs/ASSYs 

 - CA4003290 (early–mid runs; some with SIPP RAM, later SIMM), CA401177 (late, many SMD parts), and C300779‑001 Rev. 5.1 are observed in the field. [30] ([temlib.org](https://temlib.org/AtariForumWiki/index.php/Atari_ST_motherboard_revisions?utm_source=chatgpt.com)) [milan.kovac.cc](https://milan.kovac.cc/atari/chipmunk/?id=1499348247&utm_source=chatgpt.com))

- Schematic set: “Atari STe Schematic Rev. A C300780‑001” (dated Oct‑3‑1989) corresponds closely to shipping 520/1040STE boards. [31] ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com)) [elektrotanya.com](https://elektrotanya.com/atari_1040ste_c300780-001_rev.a_sch_1986.pdf/download.html?utm_source=chatgpt.com)) - Field Service Manual: “Atari 520STE/1040STE Field Service Manual” covers both models; PSU trim, theory of operation, diagnostics, flowcharts. [32] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))

Board/FAB (marking) Typical features Matching schematic docs
CA4003290 Early “beta” and revised runs; some SIPP sockets; discrete BLiTTER; later sub‑runs add integrated‑BLiTTER MCU C300780‑001 Rev.A STe schematic set
C300779‑001 Rev. 5.1 Late ’89/’90 production; SIMM RAM; frequent DMA chip updates C300780‑001 Rev.A; field addenda
CA401177 Late SMD‑heavy run; BLiTTER in MCU; surface‑mount 68000, Shifter C300780‑001 Rev.A + rev notes

Memory and Storage

- DRAM: Four 30‑pin SIMM sockets (some early units shipped SIPP). Accept 256 KB or 1 MB 8‑bit modules (with/without parity). Supported capacities: 1, 2, or 4 MB; 2.5 MB is possible but has compatibility caveats. Recommended speeds: 150 ns (256 KB) and 120 ns (1 MB). [33] ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com)) - ROM: Two socketed 128 KB ROMs (27C010 class) carrying TOS 1.06 or 1.62; upgrades and multi‑TOS switchers are common. [34] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_TOS?utm_source=chatgpt.com)) [ultradevtools.de](https://www.ultradevtools.de/ultraTos.html?utm_source=chatgpt.com)) - Floppy: Internal 3.5" DS/DD 720 KB; external 14‑pin DIN port allows second drive; HD (1.44 MB) available only via later mods/kits. [35] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com)) - Mass storage: ACSI (DB‑19) hard disks; modern SD‑based ACSI devices (e.g., UltraSatan) rely on healthy DMA silicon (see DMA notes below). [36] ([forums.atariage.com](https://forums.atariage.com/topic/211660-buggy-dma-chip/?utm_source=chatgpt.com))

- Atari 1040STE General Maintenance - Atari 1040STE Troubleshooting Guide - Atari 1040STE Capacitor Replacement Guide - Atari ST and STE RAM Upgrade Guide - Atari STE DMA Port & Hard‑Disk Guide

Sound Capabilities

In addition to the YM2149 PSG (3 tones + noise), the STE adds 2‑channel 8‑bit PCM playback via DMA, at selectable nominal rates of 6,258/12,517/25,033/50,066 Hz (mono or stereo). Audio is mixed and equalized by an LMC1992 controlled over the Microwire serial interface exposed by the Shifter; bass/treble and master/left/right levels are software‑settable. The STE also routes mixed audio to both the built‑in monitor mono output and to rear‑panel stereo RCA jacks. [37] ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com)) [mikrosk.github.io](https://mikrosk.github.io/doitarchive/doit_st/0309.htm?utm_source=chatgpt.com))

Tech note: Many units ship with PSG/DMA level imbalance (PSG “hotter”). Hardware and software adjustments are documented by the scene and repair community for achieving near‑1:1 mix when required. [38] ([atari.8bitchip.info](https://atari.8bitchip.info/STEamFix.html?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com))

General Maintenance

- PSU: Recap original switchers (DVE/Mitsumi etc.) and set +5 V at ≈5.10 V under load; replace the 2 A fuse only after root‑cause analysis. [39] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com)) - Mainboard electrolytics: Replace aging caps on CA4003290/CA401177 boards; vetted lists exist for STE cap kits. [40] ([wiki.console5.com](https://wiki.console5.com/wiki/Atari_ST?utm_source=chatgpt.com)) [console5.com](https://console5.com/store/atari-520ste-1040ste-computer-cap-kit-main-ste-pcb.html?utm_source=chatgpt.com)) - Floppy: Clean/lubricate rails; verify write‑protect and track‑0 sensors; re‑align only with proper disks/tools. - RAM: Use matched SIMM pairs; avoid 2 MB/4 MB 30‑pin modules which are not supported by the stock MMU design. [41] ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com))

For full procedures see Atari 1040STE General Maintenance.

Technical Details

Subsystem Device(s) / notes
CPU Motorola MC68000 (PLCC) @ 8 MHz; socketed on most boards. [42] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))
System ASICs GST MCU (C300589 early, C302183 later with integrated BLiTTER); GST Shifter (C301712‑001/C300588‑001). [43] ([forums.atariage.com](https://forums.atariage.com/topic/263950-missing-blitter-from-ste/?utm_source=chatgpt.com)) [atari-forum.com](https://www.atari-forum.com/viewtopic.php?t=29116&utm_source=chatgpt.com))
Blitter Discrete BLiTTER on early boards; ~4 MB/s block moves; later integrated into MCU. [44] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))
Memory 4× 30‑pin SIMM sockets (or SIPP on earliest); 1–4 MB official configurations. [45] ([info-coach.fr](https://info-coach.fr/atari/hardware/memory.php?utm_source=chatgpt.com))
Audio YM2149 PSG + 2‑ch DMA PCM (8‑bit) via Shifter; LMC1992 mixer/EQ (Microwire). [46] ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) [alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com))
I/O RS‑232 (DB‑25M), Centronics (DB‑25F), ACSI DMA (DB‑19), external floppy (14‑pin DIN), monitor (13‑pin DIN), 2× MIDI, 2× DB‑15 enhanced joystick, 2× DE‑9 mouse/joystick. [47] ([atarimagazines.com](https://www.atarimagazines.com/startv5n4/enhanced.html?utm_source=chatgpt.com)) [info-coach.fr](https://info-coach.fr/atari/hardware/interfaces.php?utm_source=chatgpt.com))
FDD WD1772 controller; 3.5" DS/DD 720 KB internal. [48] ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com))

System Architecture at a Glance

- MC68000 8 MHz core; 24‑bit address space (16 MB). - GST MCU handles DRAM multiplexing, decode, DMA hand‑off, joystick/paddle and timing. - GST Shifter fetches bitplanes and clocks RGB; exposes Microwire to the LMC1992 and manages DMA‑audio shift. - BLiTTER accelerates block copies/fills. - MFP 68901 provides timers/interrupt aggregation; ACIA 6850s handle MIDI and keyboard links. - DMA port (ACSI) arbitrates CPU/disk transfers. [49] ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com))

Apple Service Manual

This section header is retained for template consistency; Atari 1040STE documentation is covered instead by the official 520/1040STE Field Service Manual and STe schematics listed below. [50] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))

Logic Board & Analog Board Schematics

The 1040STE is a single main logic board plus a separate PSU (no discrete “analog board” as on Apple compacts). Use: - Atari STe Schematic Rev. A (C300780‑001, 1989‑10‑03). [51] ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com)) - 520/1040STE Field Service Manual (diagnostics, PSU trim, theory). [52] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com))

Troubleshooting

Common STE failure modes and pointers: - No boot/white or checker screen: reseat PLCC CPU and Shifter; verify +5 V = 5.10 V; try known‑good SIMMs in bank order (1/3); run a diagnostic cartridge if available. [53] ([forums.atariage.com](https://forums.atariage.com/topic/283468-1040ste-wont-boot-help-needed/?utm_source=chatgpt.com)) - Floppy errors: clean heads, verify WD1772 clock, check drive select and write‑protect sensors. - ACSI hard‑disk issues: certain early DMA chips (e.g., C025913‑38) are marginal; Atari and community fixes improve bus hand‑off (pull‑up changes, small timing caps); later C398739‑001A silicon is preferred. [54] ([exxosforum.co.uk](https://exxosforum.co.uk/atari/last/DMASG/index.htm?utm_source=chatgpt.com)) [forums.atariage.com](https://forums.atariage.com/topic/211660-buggy-dma-chip/?utm_source=chatgpt.com)) - Audio imbalance/distortion: adjust LMC1992 in software (reduce master volume a few dB) or apply documented Microwire/PSG level fix for proper DMA/PSG mix. [55] ([alive.atari.org](https://alive.atari.org/alive11/mcrowire.php?utm_source=chatgpt.com)) [atari.8bitchip.info](https://atari.8bitchip.info/STEamFix.html?utm_source=chatgpt.com))

🧠 Architecture and Processor

Deep‑dive register highlights for repair and testing: - DMA sound control block at $FF8900–$FF8920: set mode (mono/stereo), rate (6.25–50 kHz), base/end addresses, and looping. [56] ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) - LMC1992 Microwire writes via $FF8922/$FF8924; 11‑bit transactions (addr+data). [57] ([mikrosk.github.io](https://mikrosk.github.io/doitarchive/doit_st/0309.htm?utm_source=chatgpt.com)) - BLiTTER present flag and speed: use desktop “Blitter” option or query $FFFF8A00 series (model‑dependent). [58] ([en.wikipedia.org](https://en.wikipedia.org/wiki/Atari_ST?utm_source=chatgpt.com))

Technical Documentation

- Atari 520STE/1040STE Field Service Manual (theory, diagnostics, PSU adjustment). [59] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com)) - Atari 1040STE Schematics (C300780‑001 Rev.A) (Oct‑3‑1989). [60] ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com)) [archive.org](https://archive.org/details/Atari_1040STe_Schematic_1986_Atari?utm_source=chatgpt.com)) - Atari Compendium – Hardware Reference (DMA sound registers, system programming). [61] ([bus-error.nokturnal.pl](https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm?utm_source=chatgpt.com)) - STE Hardware Description (Info‑Coach) (chip roles, LMC1992 and GST ASIC details). [62] ([info-coach.fr](https://info-coach.fr/atari/hardware/STE-HW.php?utm_source=chatgpt.com)) - Atari ST Interfaces and Connectors (Info‑Coach) (pinouts for STE DB‑15 joystick and audio). [63] ([info-coach.fr](https://info-coach.fr/atari/hardware/interfaces.php?utm_source=chatgpt.com))

Notes on dimensions and mass

Case dimensions for the 1040‑style chassis are approximately 475×290×70 mm, consistent with user measurements and museum entries for 1040STF/M/STE shells; bare unit weights vary across revisions and drive/PSU vendors (≈4.0–4.7 kg). [64] ([forums.atariage.com](https://forums.atariage.com/topic/134542-atari-520-ste-dimensions/?utm_source=chatgpt.com)) [computermuseum.wordpress.com](https://computermuseum.wordpress.com/2006/04/25/1040-stf/?utm_source=chatgpt.com)) [amibay.com](https://www.amibay.com/threads/atari-1040ste-4mb-ram-tos-1-62-german.2442186/?utm_source=chatgpt.com))

Motherboard revisions (service reference)

Common field sightings include CA4003290 (early/mid), C300779‑001 Rev.5.1, and CA401177 (late SMD) with combinations of discrete/integrated BLiTTER and SIPP/SIMM RAM hardware. [65] ([temlib.org](https://temlib.org/AtariForumWiki/index.php/Atari_ST_motherboard_revisions?utm_source=chatgpt.com)) [milan.kovac.cc](https://milan.kovac.cc/atari/chipmunk/?id=1499348247&utm_source=chatgpt.com))

PCB Schematics & Service Guide

- Assembly/FAB identifiers: CA4003290 (early/mid), C300779‑001 Rev.5.1 (1989‑1990), CA401177 (late). [66] ([wiki.console5.com](https://wiki.console5.com/wiki/Atari_ST?utm_source=chatgpt.com)) - Schematic mapping table is provided above; use C300780‑001 Rev.A set as baseline, plus field addenda as encountered. [67] ([yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com))

Service manual and schematics (quick links)

- Atari 520/1040STE Field Service Manual (PSU 5.1 V calibration, fault trees). [68] ([manualslib.com](https://www.manualslib.com/manual/2170364/Atari-520ste.html?utm_source=chatgpt.com)) [best-electronics-ca.com](https://www.best-electronics-ca.com/service_.htm?utm_source=chatgpt.com)) - 1040STE Schematic (C300780‑001 Rev. A, 1989) (Internet Archive/Yumpu mirrors). [69] ([archive.org](https://archive.org/details/Atari_1040STe_Schematic_1986_Atari?utm_source=chatgpt.com)) [yumpu.com](https://www.yumpu.com/it/document/view/34489511/atari-ste-schematic-rev-a-c300780-001-oct-3-1989?utm_source=chatgpt.com))

References

  1. ↑ Shipping windows compiled from period coverage and museum research.
  2. ↑ End-of-production window reported by the German Atari Museum project.
  3. ↑ Contemporaneous pricing collated from dealer brochures and museum price tables.
  4. ↑ Listed in the 520STE/1040STE Field Service Manual.
  5. ↑ STE memory subsystem notes and SIMM/SIPP specifics.
  6. ↑ Port/drive summary from contemporary reviews and hardware guides.
  7. ↑ STE graphics overview and palette expansion versus STF/M.
  8. ↑ DMA sample rates and LMC1992 mixer details.
  9. ↑ User‑measured case dimensions consistent across ST and STE shells.
  10. ↑ Typical bare‑unit masses reported by collections and sales logistics.
  11. ↑ TOS versions and ROM formats for STE.
  12. ↑ Overview of STE enhancements and U.S. release timing.
  13. ↑ STE motherboard component map and GST MCU/SHIFTER roles.
  14. ↑ CPU type and packaging from the Field Service Manual.
  15. ↑ Part numbers for STE MCUs, with/without blitter.
  16. ↑ GST Shifter device references.
  17. ↑ Part roles summarized from hardware articles and service texts.
  18. ↑ Standard ST family I/O retained on STE.
  19. ↑ ACSI/DMA and external floppy connector formats.
  20. ↑ Monitor/TV outputs on STE models reviewed at launch.
  21. ↑ ST‑series hallmark MIDI ports.
  22. ↑ STE joystick port pinout and usage.
  23. ↑ Legacy ports placement description.
  24. ↑ STE rear‑panel stereo jacks.
  25. ↑ Power section adjustment and fuse rating in Field Service Manual.
  26. ↑ Resolution modes across the ST family.
  27. ↑ Palette expansion vs. earlier STs.
  28. ↑ BLiTTER throughput and fine‑scroll support.
  29. ↑ Device identities and interchangeability notes.
  30. ↑ Community‑maintained revision list and serial registry entries.
  31. ↑ Primary STe schematic drawings.
  32. ↑ Manual availability and scope.
  33. ↑ STE SIMM/SIPP guidance and timing requirements.
  34. ↑ TOS formats and upgrade practice.
  35. ↑ Stock floppy capabilities and external port.
  36. ↑ ACSI usage and DMA chip caveats on some STEs.
  37. ↑ DMA registers/rates and LMC1992 control model.
  38. ↑ Documented Microwire mix corrections and best‑practice settings.
  39. ↑ PSU calibration guidance.
  40. ↑ Consolidated capacitor lists for STE PCB variants.
  41. ↑ Supported SIMM sizes and speeds.
  42. ↑ CPU packaging and speed.
  43. ↑ Part numbers and integration notes.
  44. ↑ BLiTTER presence and throughput.
  45. ↑ Memory sockets and limits.
  46. ↑ DMA and Microwire chain.
  47. ↑ Panel I/O inventory.
  48. ↑ WD1772 use on STE.
  49. ↑ Consolidated STE block‑level description.
  50. ↑ Atari, not Apple, publishes the applicable service literature.
  51. ↑ Primary schematic set for 520/1040STE.
  52. ↑ Field servicing content and procedures.
  53. ↑ Community triage tactics; RAM isolation and reseat advice.
  54. ↑ Known “DMA bug” history and mitigation.
  55. ↑ Microwire programming and hardware correction notes.
  56. ↑ Register map and recommended programming sequence for playback.
  57. ↑ Microwire timing, masks, and command format.
  58. ↑ Presence and configuration checks.
  59. ↑ Manual sources and scanned copies.
  60. ↑ Schematics hosted by preservation sites.
  61. ↑ Compendium hardware chapters.
  62. ↑ STE hardware overview and translations of ST Magazine technical articles.
  63. ↑ Connector pinouts and port usage.
  64. ↑ Dimension and weight observations from museum sources and shipping reports.
  65. ↑ Community rev lists and serial database entries corroborating board IDs.
  66. ↑ See also cap lists keyed to board markings for recapping jobs.
  67. ↑ Multiple hosts mirror the same Rev.A package; verify sheet dates.
  68. ↑ Manualslib mirror; Best Electronics print copies.
  69. ↑ Schematic sets and dates.

Categories:


Editorial note on the “infobox” request and section names: The values supplied in the user’s template (e.g., Apple‑specific data) do not match the Atari 1040STE and would be factually incorrect if reproduced. This page therefore provides a complete, accurate “infobox computer” for the 1040STE. Likewise, Apple‑specific section titles are retained for structural compatibility, but the content points to the correct Atari service literature.

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