Editing Atari 1040STE (section)

== Technical Details ==
{| class="wikitable styled-table" style="width:100%; text-align:center;"
! Subsystem !! ICs / part numbers !! Notes
|-
| CPU || Motorola MC68000FN8 (C398061) || 8 MHz PLCC‑68; 16‑bit data / 24‑bit address.<ref>{{cite web |url=https://mikrosk.github.io/doitarchive/doit_st/0303.htm |title=DOIT_ST: Parts |publisher=DOIT_ST |access-date=2025-08-12}}</ref>
|-
| System glue/MMU || GST MCU C300589 (no BLiTTER) or C302183 (with BLiTTER) || 144‑pin QFP on later boards; integrates address decode, DRAM timing, joystick A/D, BLiTTER (when C302183).<ref>{{cite web |url=https://forums.atariage.com/topic/263950-missing-blitter-from-ste/ |title=Missing BLiTTER from STE (IC IDs) |publisher=AtariAge Forums |date=2017 |access-date=2025-08-12}}</ref>
|-
| Video (Shifter) || GST Shifter C300588‑001 / C301712‑001 || 12‑bit palette (4096 colors).<ref>{{cite web |url=https://www.atari-forum.com/viewtopic.php?t=29116 |title=Atari‑Forum: STE Shifter part numbers |publisher=Atari‑Forum |date=2016 |access-date=2025-08-12}}</ref>
|-
| BLiTTER || PLCC‑68 Atari BLiTTER (various revs) or integrated in C302183 || Block move/line op accelerator.<ref>{{cite web |url=https://mikrosk.github.io/doitarchive/doit_st/080104.htm |title=DOIT_ST: BLiTTER |publisher=DOIT_ST |access-date=2025-08-12}}</ref>
|-
| PSG || Yamaha YM2149F || 3 voices + noise; envelope generator.<ref>{{cite web |url=https://temlib.org/AtariForumWiki/index.php/Yamaha_YM2149 |title=Yamaha YM2149 |publisher=AtariForumWiki |access-date=2025-08-12}}</ref>
|-
| DMA sound || DMA engine in STe video/audio path; DAC‑08 class converters; LMC1992 mixer || Stereo 8‑bit PCM at 6.258–50.066 kHz; Microwire control.<ref>{{cite web |url=https://bus-error.nokturnal.pl/atari_compendium/html/chap5.htm |title=Atari Compendium – DMA sound |publisher=Bus‑Error mirror |access-date=2025-08-12}}</ref><ref>{{cite web |url=https://mikrosk.github.io/doitarchive/doit_st/0303.htm |title=DOIT_ST: Parts (C398058 LMC1992; C398057 DAC‑0800) |publisher=DOIT_ST |access-date=2025-08-12}}</ref>
|-
| Floppy controller || WD1772 (often ‑02‑02) || 720 KB DD; late HD requires AJAX (not stock on 1040STE).<ref>{{cite web |url=https://temlib.org/AtariForumWiki/index.php/WD1772 |title=WD1772 |publisher=AtariForumWiki |access-date=2025-08-12}}</ref>
|-
| ACSI/DMA || C025913‑38 (early) or C398739‑001(A) (later) || Later IC fixes write‑timing corruption on some early STEs.<ref>{{cite web |url=https://www.chzsoft.de/site/hardware/new-atari-ste-bad-dma-investigation/ |title=STE bad DMA investigation |author=Christian Zietz |date=2023-04-22 |access-date=2025-08-12}}</ref>
|-
| I/O support || MC68901; 2× MC6850; RS‑232 line drivers/receivers || Timers/interrupts, MIDI/IKBD ACIAs; DB‑25 RS‑232/parallel.<ref>{{cite web |url=https://info-coach.fr/atari/hardware/STE-HW.php |title=Atari STE Hardware |publisher=Info‑Coach.fr |date=2021-08-16 |access-date=2025-08-12}}</ref>
|}
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