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Rewritten against the XE-series Field Service Manual: ROM corrected to 24 KB (16 KB OS + 8 KB BASIC Rev C), not 16 KB as 10+6; power is +5 V through a 7-pin DIN from a brick containing the transformer, bridge and LM78S05 (5 V +/-5%, 1.5 A), no on-board regulator; SIO carries no supply rail; board assemblies CO70025/CA20097/CA200519 named; launch price sourced to Creative Computing March 1985
 
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{{Infobox computer
{{Infobox computer
| name        = Atari 65XE
| name        = Atari 65XE
| image        = [[File:Atari65XE.jpg|250px]]
| image        = [[File:Atari 65XE (photo).jpg|250px]]
| caption      = Atari 65XE Home Computer
| caption      = Atari 65XE home computer
| manufacturer = Atari Corporation
| manufacturer = Atari Corporation
| type        = Home Computer
| type        = Home computer
| release date = 1985
| release date = 1985 (shown at the Winter CES, January 1985)
| discontinued = 1992
| price        = US$100-120 at launch
| price        = US$120 (1985)
| cpu          = MOS Technology 6502C @ 1.79 MHz (NTSC) / 1.77 MHz (PAL)
| cpu          = MOS Technology 6502C @ 1.79 MHz (NTSC) / 1.77 MHz (PAL)
| memory      = 64 KB RAM, 16 KB ROM (BASIC, OS)
| memory      = 64 KB RAM; 24 KB ROM (16 KB operating system + 8 KB Atari BASIC Rev. C)
| storage      = External cassette tape (410/1010), optional 5.25" floppy disk drive (1050/XF551)
| storage      = Cassette (410/1010) or 5.25" floppy disk drive (1050/XF551) over SIO; ROM cartridge
| display      = 320×192 pixels, 40×24 text, 16 colours (ANTIC/GTIA)
| display      = 40 x 24 text, up to 320 x 192 pixels
| sound        = POKEY: 4 voices, 8-bit, noise, envelope, keyboard scan
| sound        = POKEY: four audio channels
| dimensions  = 34 cm × 24 cm × 7 cm
| os          = Atari XE Operating System; Atari BASIC Rev. C in ROM
| weight      = 1.7 kg
| os          = Atari BASIC (in ROM), Atari OS
| predecessor  = [[Atari 800XL]]
| predecessor  = [[Atari 800XL]]
| successor    = [[Atari 130XE]]
| successor    = [[Atari 130XE]]
| codename    = Sweet-16
| model        = 65XE
| model        = 65XE
| logo        = [[File:Atari XE logo.svg|250px]]
}}
}}


The '''Atari 65XE''' is an 8-bit home computer introduced by Atari Corporation in 1985 as part of the XE ("XL Enhanced") series. It maintained compatibility with the Atari 8-bit family while featuring a redesigned case and revised electronics, targeting the home computing and gaming market during the mid-1980s.
The '''Atari 65XE''' is the 64 KB member of Atari Corporation's XE range, shown at the Winter
Consumer Electronics Show in January 1985 as the cost-reduced replacement for the
[[Atari 800XL]]. Atari's marketing manager described the redesign at the time as "engineering
optimization" - the same machine made cheaper and more reliable through the use of fewer parts -
and priced it at the pre-January 800XL price of '''US$100 to US$120'''.<ref name="creative85">Tim Onosko and John J. Anderson, "Atari strikes back", ''Creative Computing'' Vol. 11 No. 3 (March 1985), p. 59, reproduced at [http://www.atarimagazines.com/creative/v11n3/59_Atari_strikes_back_with_.php atarimagazines.com]. Contemporary report of the Winter CES 1985 line-up, written from briefings by Atari marketing manager Brian Kerr; source for the 65XE, 65XEM and XEP prices and the AMY specification quoted here.</ref> Atari stated
that the 65XE was 100% compatible with the 800XL it replaced.<ref name="antic85">Jack Powell, "130XE: How Atari's New 8-Bit Does It", ''Antic'' Vol. 4 No. 3 (July 1985), reproduced at [https://www.atarimagazines.com/v4n3/130XE.html atarimagazines.com]. Atari's first published specification for the 130XE: bank-switching modes, the Enhanced Cartridge Interface signal list, and the 1.2 A at 5 V DC supply requirement.</ref>


== 🧠 Architecture and Processor ==
Atari's field service manual for the XE line covers the 65XE directly: Section 2 carries the
At its core, the 65XE uses the '''MOS Technology 6502C''' microprocessor, a variant of the classic 6502, running at:
schematics and silkscreens for the '''CO70025''', '''CA20097''' and '''CA200519''' 65XE
* '''1.79 MHz''' (NTSC systems)
assemblies alongside the 130XE ones.<ref name="fsm130">Atari, ''130XE Personal Computer Field Service Manual''. Section 1 (theory of operation, chip pin assignments, external power supply schematic and rating, connector pinouts), Section 2 (schematics and silkscreens for all seven XE board assemblies), Section 3 (self test and production-test diagnostic error codes). Despite its title it covers the 65XE, the 800XE and the XE Game System as well. Hosted on this wiki: [[:File:Atari 130XE Field Service Manual.pdf]].</ref>
* '''1.77 MHz''' (PAL systems)


The 6502C coordinates system operations and interfaces with Atari’s custom chips, including ANTIC (video), GTIA (graphics), POKEY (sound and I/O), and PIA (peripherals).
== Architecture and processor ==


== 💾 Memory and Storage ==
The 65XE uses the '''6502C''' at 1.79 MHz (NTSC) or 1.77 MHz (PAL) with the XE chipset:
The Atari 65XE is equipped with:
'''ANTIC''' (display processor, which also controls bus access and RAM refresh), '''GTIA'''
* '''64 KB RAM'''
(colour and luminance generation from ANTIC's bit stream, plus player/missile graphics),
* '''16 KB ROM''', comprising:
'''POKEY''' (audio, SIO control, controller scan and keyboard scan), the '''PIA''' (general
** 10 KB for the operating system (OS)
purpose I/O), '''FREDDIE''' (memory controller, which also generates the clock signal to the
** 6 KB for Atari BASIC (Revision C)
CPU) and the memory management unit '''MMU1''', Atari part '''C061618'''.<ref name="fsm130" />


Storage options include:
The master oscillator is '''14.31818 MHz''' on NTSC machines and '''14.187576 MHz''' on PAL
* '''Cassette tape drive''' (Atari 410/1010)
machines.<ref name="fsm130" />
* '''5.25" floppy disk drive''' (Atari 1050, XF551)
* Cartridge slot for instant program loading


== 🖥️ Display and Graphics ==
== Memory ==
Video output is managed by the '''ANTIC''' and '''GTIA''' chips, providing:
* Resolution up to '''320×192 pixels'''
* Text display: '''40 columns × 24 rows'''
* '''16 colours''' (palette from 256 possible hues/luminances)
* Multiple graphics modes (ANTIC modes 2–15), hardware vertical/horizontal scrolling
* Hardware sprites ("player/missile graphics") for smooth animation


The XE series supports composite and RF video output for connection to TVs and monitors.
* '''64 KB RAM'''. On the CO70025 and CA20097 assemblies this is '''eight 64K x 1 (4164)'''
  DRAMs; on the later CA200519 assembly it is '''two 64K x 4 (4464)''' DRAMs.<ref name="fsm130" />
* '''24 KB ROM''' - a 16K x 8 operating system ROM plus 8 KB of Atari BASIC Rev. C. The
  self-test memory screen represents the ROM as '''two 8 KB bars'''.<ref name="fsm130" />


== 🔊 Sound Capabilities ==
Two operating-system ROM part numbers are documented for the XE line, '''C061598''' and
Audio is generated by the '''POKEY''' chip, offering:
'''C300717'''. The difference is visible in the self test: a board fitted with C300717 shows
* '''4 independent audio channels''' (voices), each 8-bit
'''four extra bars''' for the four 16 KB extended memory banks.<ref name="fsm130" /> On a 65XE those extra
* Programmable frequency, noise, and envelope control
bars have no RAM behind them - the extended banks are a [[Atari 130XE|130XE]] feature.
* Keyboard scanning and serial I/O support
* Capable of complex sound effects and simple music synthesis


== 🎮 Input/Output and Expansion ==
== Display, video output and sound ==
The 65XE provides a range of I/O ports:
* '''Cartridge slot''' – for software and hardware expansions
* '''SIO (Serial Input/Output) port''' – connects to disk drives, printers, modems, and other peripherals
* '''Two joystick ports''' – compatible with Atari-standard controllers
* '''Composite and RF video outputs''' – for TV/monitor connection
* '''Parallel bus''' (internal, not user-accessible) for memory upgrades and peripherals


The XE series dropped the XL’s parallel bus connector, limiting some expansion options compared to earlier models.
Video is produced by ANTIC and GTIA: text up to 40 x 24, bitmap modes up to 320 x 192 pixels,
four players and four missiles with collision detection, and programmable display lists with
hardware fine scrolling.
 
The '''5-pin DIN monitor jack''' carries:<ref name="fsm130" />


== 🔍 PCB Schematics & Service Manual ==
<templatestyles src="Template:StyledTable/styles.css" />
<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:55%;"
|+ '''XE monitor jack pin assignments'''
! Pin !! Signal
|-
| 1 || Monochrome (luminance) video output
|-
| 2 || Ground
|-
| 3 || Audio output
|-
| 4 || Composite video output
|-
| 5 || Colour (chrominance) output
|}
RF output is through a built-in modulator with a channel 2/3 switch; the modulated signal is
1-2 mV into 75 ohms.<ref name="fsm130" />
POKEY provides four audio channels, keyboard scanning, controller scanning and the SIO serial
port.<ref name="fsm130" />
== Input, output and expansion ==
* '''Cartridge slot''' - 30-pin edge connector<ref name="fsm130" />
* '''SIO port''' - 13-pin. Pin 1 clock in, 2 clock out, 3 data into CPU, 4 ground, 5 data out,
  6 ground, 7 command, 8 motor control, 9 proceed, '''10 ready (computer on)''',
  11 audio in (175 mV), '''12 not used''', 13 interrupt<ref name="fsm130" />
* '''Two controller jacks''' - 9-pin D-type; pin 7 is +5 V, pin 8 ground<ref name="fsm130" />
* '''Monitor jack''' - 5-pin DIN
* '''RF output''' with channel 2/3 switch
* '''Power jack''' - 7-pin DIN
{{Warning|The SIO port on the XE machines carries '''no supply rail'''. Pin 10 is a "ready"
signal, not a +5 V output, and pin 12 is not used at all. Instructions to "check the +5 V and
+12 V lines on SIO pins 10 and 12" describe something that does not exist on these
machines.<ref name="fsm130" />}}
The XE range dropped the XL's 50-pin Parallel Bus Interface. Its replacement, the '''Enhanced
Cartridge Interface (ECI)''' - a 14-pin extension sitting behind the 30-pin cartridge connector
- was announced as a '''130XE-only''' feature.<ref name="antic85" /> The later '''CA200519''' board assembly
is shared between the 130XE and the 65XE/800XE, so individual machines vary; check the rear
panel of the actual unit rather than assuming from the model name.<ref name="fsm130" />
== Power ==
The 65XE takes '''+5 V DC through a 7-pin DIN power jack'''. The power jack, the power switch
and the filtering are on the motherboard; everything else is in the external brick, which
contains the step-down transformer (115 V or 230 V AC in, 9 V AC out), a bridge rectifier, an
'''LM78S05''' regulator, a '''4700 uF''' reservoir capacitor and a '''100 uF''' output
capacitor. Atari rates the output at '''5 V +/-5%, 1.5 A maximum'''.<ref name="fsm130" />


The Atari 65XE features a compact mainboard integrating the 6502C CPU, ANTIC, GTIA, POKEY, and RAM/ROM ICs. Service documentation and schematics are essential for repair and restoration.
There is '''no rectifier, bridge or regulator on any XE motherboard'''. Descriptions of the XE
power input as a "5.5 mm / 2.1 mm centre-positive barrel jack" are wrong for every machine in
this range.<ref name="fsm130" />


{| class="wikitable styled-table" style="width:80%; text-align:center;"
== Keyboard and self test ==
! style="background-color:#f2f2f2;"| Logic Board
 
! style="background-color:#f2f2f2;"| Schematic Diagrams
The XE keyboard is a full-stroke alphanumeric keyboard with a space bar and five function keys:
'''HELP''', '''START''', '''SELECT''', '''OPTION''' and '''RESET'''.<ref name="fsm130" />
 
* Holding '''OPTION''' while switching on disconnects the internal BASIC, and with no active
  disk drive the '''self test''' runs.<ref name="fsm130" />
* '''HELP''' (or RESET) ends a looping self test and returns to the menu.<ref name="fsm130" />
 
The self test covers memory, audio/visual, keyboard, ports, ROM and RAM, and Atari's production
test cartridge adds a numbered diagnostic error-code table - both are set out on the
[[Atari 65XE Troubleshooting Guide]].
 
== Board assemblies ==
 
{| class="wikitable styled-table" style="width:80%;"
|+ '''65XE board assemblies documented by Atari'''
! Assembly !! RAM !! Notes
|-
| '''CO70025''' || 8 x 4164 (64K x 1) || Schematic figure 2-7, silkscreen figure 2-8<ref name="fsm130" />
|-
| '''CA20097''' || 8 x 4164 (64K x 1) || 65XEN; schematic figure 2-9, silkscreen figure 2-8<ref name="fsm130" />
|-
|-
| [[File:Atari65XE_Mainboard.jpg|thumb|center|300px|Atari 65XE Logic Board]]
| '''CA200519''' || 2 x 4464 (64K x 4) || Shared 65XE/800XE assembly; schematic figure 2-11, silkscreen figure 2-12<ref name="fsm130" />
| [[File:Atari65XE_Schematic.png|center|thumb|300px|Atari 65XE Mainboard Schematic]]
|}
|}


*For full service documentation, see the [[Atari 65XE Service Manual]] and [[Atari 8-bit Family Schematics]].*
== Gallery ==


== 📷 Gallery ==
<gallery mode="packed" heights="180">
<gallery mode="packed" heights="180">
File:Atari65XE.jpg|Atari 65XE front view
File:Atari 65XE (photo).jpg|Atari 65XE
File:Atari65XE_rear.jpg|Rear panel with I/O ports
File:Atari65XE rear.jpg|Rear panel
File:Atari65XE_Mainboard.jpg|65XE motherboard (top view)
File:Atari65XE Mainboard.jpg|65XE main board
File:Atari_XE_family.jpg|Atari XE series (65XE, 130XE)
</gallery>
</gallery>


== 🧪 Related Pages ==
== Service documentation ==
 
{| class="wikitable styled-table" style="width:75%; text-align:center;"
|+ '''Atari 65XE documentation'''
! Main board schematic !! Field service manual
|-
| [[File:ATARI65XE-SCHEMATIC.pdf|center|thumb|Atari 65XE main board schematic]]
| [[File:Atari 130XE Field Service Manual.pdf|center|thumb|XE-series Field Service Manual]]
|}
 
The manual is also available as a page: [[Atari 130XE Field Service Manual]]. Despite its title
it is the service manual for the whole XE range, including this machine.
 
== Related pages ==
 
* [[Atari 65XE General Maintenance]]
* [[Atari 65XE General Maintenance]]
* [[Atari 65XE Troubleshooting Guide]]
* [[Atari 65XE Troubleshooting Guide]]
* [[Atari 65XE Keyboard Repair Guide]]
* [[Atari 65XE Capacitor Replacement Guide]]
* [[Atari 8-bit Family Capacitor Replacement Guide]]
* [[Atari 130XE]]
* [[Atari 8-bit Family Technical Reference]]
* [[Atari 800XE]]
* [[Atari 65XE (Poland)]]


[[Category:Atari 8-bit Computers]]
== References ==
{{Navbox-Atari8bit}}


<templatestyles src="Template:StyledTable/styles.css" />
<references />
 
{{Navbox-AtariVintageComputers}}
 
[[Category:Atari Systems]]

Latest revision as of 04:11, 23 September 2026

Atari 65XE
Atari 65XE home computer
Specifications
ManufacturerAtari Corporation
TypeHome computer
Released1985 (shown at the Winter CES, January 1985)
Intro priceUS$100-120 at launch
CPUMOS Technology 6502C @ 1.79 MHz (NTSC) / 1.77 MHz (PAL)
Memory64 KB RAM; 24 KB ROM (16 KB operating system + 8 KB Atari BASIC Rev. C)
StorageCassette (410/1010) or 5.25" floppy disk drive (1050/XF551) over SIO; ROM cartridge
Display40 x 24 text, up to 320 x 192 pixels
SoundPOKEY: four audio channels
OS / FirmwareAtari XE Operating System; Atari BASIC Rev. C in ROM
PredecessorAtari 800XL
SuccessorAtari 130XE
Model no.65XE

The Atari 65XE is the 64 KB member of Atari Corporation's XE range, shown at the Winter Consumer Electronics Show in January 1985 as the cost-reduced replacement for the Atari 800XL. Atari's marketing manager described the redesign at the time as "engineering optimization" - the same machine made cheaper and more reliable through the use of fewer parts - and priced it at the pre-January 800XL price of US$100 to US$120.[1] Atari stated that the 65XE was 100% compatible with the 800XL it replaced.[2]

Atari's field service manual for the XE line covers the 65XE directly: Section 2 carries the schematics and silkscreens for the CO70025, CA20097 and CA200519 65XE assemblies alongside the 130XE ones.[3]

Architecture and processor

[edit | edit source]

The 65XE uses the 6502C at 1.79 MHz (NTSC) or 1.77 MHz (PAL) with the XE chipset: ANTIC (display processor, which also controls bus access and RAM refresh), GTIA (colour and luminance generation from ANTIC's bit stream, plus player/missile graphics), POKEY (audio, SIO control, controller scan and keyboard scan), the PIA (general purpose I/O), FREDDIE (memory controller, which also generates the clock signal to the CPU) and the memory management unit MMU1, Atari part C061618.[3]

The master oscillator is 14.31818 MHz on NTSC machines and 14.187576 MHz on PAL machines.[3]

Memory

[edit | edit source]
  • 64 KB RAM. On the CO70025 and CA20097 assemblies this is eight 64K x 1 (4164)
 DRAMs; on the later CA200519 assembly it is two 64K x 4 (4464) DRAMs.[3]
  • 24 KB ROM - a 16K x 8 operating system ROM plus 8 KB of Atari BASIC Rev. C. The
 self-test memory screen represents the ROM as two 8 KB bars.[3]

Two operating-system ROM part numbers are documented for the XE line, C061598 and C300717. The difference is visible in the self test: a board fitted with C300717 shows four extra bars for the four 16 KB extended memory banks.[3] On a 65XE those extra bars have no RAM behind them - the extended banks are a 130XE feature.

Display, video output and sound

[edit | edit source]

Video is produced by ANTIC and GTIA: text up to 40 x 24, bitmap modes up to 320 x 192 pixels, four players and four missiles with collision detection, and programmable display lists with hardware fine scrolling.

The 5-pin DIN monitor jack carries:[3]

XE monitor jack pin assignments
Pin Signal
1 Monochrome (luminance) video output
2 Ground
3 Audio output
4 Composite video output
5 Colour (chrominance) output

RF output is through a built-in modulator with a channel 2/3 switch; the modulated signal is 1-2 mV into 75 ohms.[3]

POKEY provides four audio channels, keyboard scanning, controller scanning and the SIO serial port.[3]

Input, output and expansion

[edit | edit source]
  • Cartridge slot - 30-pin edge connector[3]
  • SIO port - 13-pin. Pin 1 clock in, 2 clock out, 3 data into CPU, 4 ground, 5 data out,
 6 ground, 7 command, 8 motor control, 9 proceed, 10 ready (computer on),
 11 audio in (175 mV), 12 not used, 13 interrupt[3]
  • Two controller jacks - 9-pin D-type; pin 7 is +5 V, pin 8 ground[3]
  • Monitor jack - 5-pin DIN
  • RF output with channel 2/3 switch
  • Power jack - 7-pin DIN

The XE range dropped the XL's 50-pin Parallel Bus Interface. Its replacement, the Enhanced Cartridge Interface (ECI) - a 14-pin extension sitting behind the 30-pin cartridge connector - was announced as a 130XE-only feature.[2] The later CA200519 board assembly is shared between the 130XE and the 65XE/800XE, so individual machines vary; check the rear panel of the actual unit rather than assuming from the model name.[3]

Power

[edit | edit source]

The 65XE takes +5 V DC through a 7-pin DIN power jack. The power jack, the power switch and the filtering are on the motherboard; everything else is in the external brick, which contains the step-down transformer (115 V or 230 V AC in, 9 V AC out), a bridge rectifier, an LM78S05 regulator, a 4700 uF reservoir capacitor and a 100 uF output capacitor. Atari rates the output at 5 V +/-5%, 1.5 A maximum.[3]

There is no rectifier, bridge or regulator on any XE motherboard. Descriptions of the XE power input as a "5.5 mm / 2.1 mm centre-positive barrel jack" are wrong for every machine in this range.[3]

Keyboard and self test

[edit | edit source]

The XE keyboard is a full-stroke alphanumeric keyboard with a space bar and five function keys: HELP, START, SELECT, OPTION and RESET.[3]

  • Holding OPTION while switching on disconnects the internal BASIC, and with no active
 disk drive the self test runs.[3]
  • HELP (or RESET) ends a looping self test and returns to the menu.[3]

The self test covers memory, audio/visual, keyboard, ports, ROM and RAM, and Atari's production test cartridge adds a numbered diagnostic error-code table - both are set out on the Atari 65XE Troubleshooting Guide.

Board assemblies

[edit | edit source]
65XE board assemblies documented by Atari
Assembly RAM Notes
CO70025 8 x 4164 (64K x 1) Schematic figure 2-7, silkscreen figure 2-8[3]
CA20097 8 x 4164 (64K x 1) 65XEN; schematic figure 2-9, silkscreen figure 2-8[3]
CA200519 2 x 4464 (64K x 4) Shared 65XE/800XE assembly; schematic figure 2-11, silkscreen figure 2-12[3]
[edit | edit source]
  • Atari 65XE
    Atari 65XE
  • Rear panel
    Rear panel
  • 65XE main board
    65XE main board

Service documentation

[edit | edit source]
Atari 65XE documentation
Main board schematic Field service manual
File:ATARI65XE-SCHEMATIC.pdf File:Atari 130XE Field Service Manual.pdf

The manual is also available as a page: Atari 130XE Field Service Manual. Despite its title it is the service manual for the whole XE range, including this machine.

[edit | edit source]

References

[edit | edit source]
  1. ↑ Tim Onosko and John J. Anderson, "Atari strikes back", Creative Computing Vol. 11 No. 3 (March 1985), p. 59, reproduced at atarimagazines.com. Contemporary report of the Winter CES 1985 line-up, written from briefings by Atari marketing manager Brian Kerr; source for the 65XE, 65XEM and XEP prices and the AMY specification quoted here.
  2. ↑ 2.0 2.1 Jack Powell, "130XE: How Atari's New 8-Bit Does It", Antic Vol. 4 No. 3 (July 1985), reproduced at atarimagazines.com. Atari's first published specification for the 130XE: bank-switching modes, the Enhanced Cartridge Interface signal list, and the 1.2 A at 5 V DC supply requirement.
  3. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.20 3.21 Atari, 130XE Personal Computer Field Service Manual. Section 1 (theory of operation, chip pin assignments, external power supply schematic and rating, connector pinouts), Section 2 (schematics and silkscreens for all seven XE board assemblies), Section 3 (self test and production-test diagnostic error codes). Despite its title it covers the 65XE, the 800XE and the XE Game System as well. Hosted on this wiki: File:Atari 130XE Field Service Manual.pdf.


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