Atari 800 - Revision history

Josh at 20:17, 9 August 2025

2025-08-09T20:17:07Z

← Older revision		Revision as of 21:17, 9 August 2025
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	The '''Atari 800''' is an 8-bit home computer introduced by Atari, Inc. in late 1979, designed as a robust, expandable system for the home and education markets. It was part of the original Atari 8-bit family, featuring advanced graphics and sound capabilities for its era.		The '''Atari 800''' is an 8-bit home computer introduced by Atari, Inc. in late 1979, designed as a robust, expandable system for the home and education markets. It was part of the original Atari 8-bit family, featuring advanced graphics and sound capabilities for its era.

	== 🧠 Architecture and Processor ==		== Architecture and Processor ==
	The Atari 800 is built around the '''MOS Technology 6502''' microprocessor, running at:		The Atari 800 is built around the '''MOS Technology 6502''' microprocessor, running at:
	* '''1.79 MHz''' (NTSC systems)		* '''1.79 MHz''' (NTSC systems)
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	This coprocessor-based design enabled the Atari 800 to deliver advanced multimedia features and flexible video modes.		This coprocessor-based design enabled the Atari 800 to deliver advanced multimedia features and flexible video modes.

	== 💾 Memory and Storage ==		== Memory and Storage ==
	The Atari 800 shipped with:		The Atari 800 shipped with:
	* '''8 KB RAM''' standard (early units), expandable to '''48 KB RAM''' via plug-in memory cards.		* '''8 KB RAM''' standard (early units), expandable to '''48 KB RAM''' via plug-in memory cards.
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	* '''Cartridge slot''' – for instant-load software and BASIC interpreter.		* '''Cartridge slot''' – for instant-load software and BASIC interpreter.

	== 🖥️ Display and Graphics ==		== Display and Graphics ==
	Graphics capabilities were a major strength of the Atari 800, driven by the ANTIC and CTIA/GTIA chips:		Graphics capabilities were a major strength of the Atari 800, driven by the ANTIC and CTIA/GTIA chips:
	* '''Text modes:''' up to 40 columns × 24 rows.		* '''Text modes:''' up to 40 columns × 24 rows.
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	These features allowed for arcade-quality visuals and animation, setting the Atari 800 apart from most contemporaries.		These features allowed for arcade-quality visuals and animation, setting the Atari 800 apart from most contemporaries.

	== 🔊 Sound Capabilities ==		== Sound Capabilities ==
	Audio is provided by the '''POKEY''' chip, offering:		Audio is provided by the '''POKEY''' chip, offering:
	* '''4 independent audio channels''' (voices).		* '''4 independent audio channels''' (voices).
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	The POKEY's flexibility enabled a wide range of sound effects and music, making the Atari 800 popular among game developers.		The POKEY's flexibility enabled a wide range of sound effects and music, making the Atari 800 popular among game developers.

	== 🎮 Input/Output and Expansion ==		== Input/Output and Expansion ==
	The Atari 800 was designed for expandability and robust I/O:		The Atari 800 was designed for expandability and robust I/O:
	* '''Two cartridge slots''' (one primary, one auxiliary) for software and hardware expansion.		* '''Two cartridge slots''' (one primary, one auxiliary) for software and hardware expansion.
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	The system's modular design and shielded, rugged case made it suitable for both home and educational use.		The system's modular design and shielded, rugged case made it suitable for both home and educational use.

	== 🔍 PCB Schematics & Service Manual ==		== PCB Schematics & Service Manual ==
	<templatestyles src="Template:StyledTable/styles.css" />		<templatestyles src="Template:StyledTable/styles.css" />

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	Official service manuals and schematics are available via the [[Atari 400 800 Field Service Manual June 82\|Atari 400 / 800 Field Service Manual]]		Official service manuals and schematics are available via the [[Atari 400 800 Field Service Manual June 82\|Atari 400 / 800 Field Service Manual]]

	== 📷 Gallery ==		== Gallery ==
	<gallery mode="packed" heights="200">		<gallery mode="packed" heights="200">
	File:Atari800.jpg\|Atari 800 front view		File:Atari800.jpg\|Atari 800 front view
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	</gallery>		</gallery>

	== 🧪 Related Pages ==		== Related Pages ==
	* [[Atari 800 General Maintenance]]		* [[Atari 800 General Maintenance]]
	* [[Atari 800 Troubleshooting Guide]]		* [[Atari 800 Troubleshooting Guide]]

Josh at 17:47, 9 May 2025

2025-05-09T17:47:19Z

← Older revision		Revision as of 18:47, 9 May 2025
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	* [[Atari 800 Capacitor Replacement Guide]]		* [[Atari 800 Capacitor Replacement Guide]]
	* [[Atari 8-bit Family]]		* [[Atari 8-bit Family]]

	~~[[Category:Atari 8-bit Computers]]~~
	[[Category:Atari Systems]]		[[Category:Atari Systems]]

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Josh: /* 🔍 PCB Schematics & Service Manual */

2025-05-09T17:46:39Z

🔍 PCB Schematics & Service Manual

← Older revision		Revision as of 18:46, 9 May 2025
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	\| codename = Colleen		\| codename = Colleen
	\| model = 800		\| model = 800
	\| logo = [[File:Atari 800 logo.svg\|250px]]		\| logo = [[File:Atari 800 logo-03.svg\|250px]]
	}}		}}

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	! Logic Board !! Logic Board Schematic		! Logic Board !! Logic Board Schematic
	\|-		\|-
	\| [[File:Atari 800 mainboard and daughterboard.~~png~~\|center\|thumb\|300x300px\|Atari 800 Logic Board]]<br>		\| [[File:Atari 800 mainboard and daughterboard.jpg\|center\|thumb\|300x300px\|Atari 800 Logic Board]]<br>
	\| [[File:Atari 400 800 Home Computer Schematics.pdf\|alt=Atari 400 / 800 Schematics\|center\|thumb\|Atari 400 / 800 Schematics]]<br>		\| [[File:Atari 400 800 Home Computer Schematics.pdf\|alt=Atari 400 / 800 Schematics\|center\|thumb\|Atari 400 / 800 Schematics]]<br>
	\|}		\|}
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	<gallery mode="packed" heights="200">		<gallery mode="packed" heights="200">
	File:Atari800.jpg\|Atari 800 front view		File:Atari800.jpg\|Atari 800 front view
	File:~~Atari800_rear~~.jpg\|~~Rear~~ panel with I/O ports		File:Atari-800-Computer-Port-Side.jpg\|Side panel with I/O ports
	File:~~Atari800_Mainboard~~.jpg\|Atari 800 main logic board		File:Atari 800 mainboard and daughterboard.jpg\|Atari 800 main logic board
	File:~~Atari800_MemoryBoard.jpg\|Plug-in memory card~~		File:Atari 410.jpg\|Atari 410 Program Recorder (cassette)
	~~File:Atari_410_Cassette~~.jpg\|Atari 410 Program Recorder (cassette)
	~~File:Atari_810_Disk_Drive.jpg\|Atari 810 5.25" floppy disk drive~~
	</gallery>		</gallery>

Josh: /* 🔍 PCB Schematics & Service Manual */

2025-05-09T17:00:11Z

🔍 PCB Schematics & Service Manual

← Older revision		Revision as of 18:00, 9 May 2025
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	The Atari 800 consists of a main logic board and plug-in memory cards. Its robust, shielded construction was intended to meet stringent FCC requirements for home electronics.		The Atari 800 consists of a main logic board and plug-in memory cards. Its robust, shielded construction was intended to meet stringent FCC requirements for home electronics.

	{\| class="wikitable styled-table" style="width:80%; text-align:center;"		{\| class="wikitable styled-table" style="width:75%; text-align:center;"
	~~! style="background-color:#f2f2f2;"~~\| Main ~~Logic Board~~		\|+'''Atari 800 Main Boards'''
	~~! style="background-color:#f2f2f2;"\| Memory Board~~
	\|-		\|-
	\| [[File:~~Atari800_Mainboard.jpg\|thumb\|center\|300px\|~~Atari 800 ~~Main Logic Board]][[File:Atari800_Schematic~~.png\|center\|thumb\|Atari 800 ~~Main~~ Board ~~Schematic~~]]		! Logic Board !! Logic Board Schematic
	\| [[File:~~Atari800_MemoryBoard~~.~~jpg\|thumb\|center\|250px~~\|Atari 800 ~~16 KB Memory Board]][[File:Atari800_MemorySchematic.png~~\|center\|thumb\|Atari 800 ~~Memory Board Schematic~~]]		\|-
			\| [[File:Atari 800 mainboard and daughterboard.png\|center\|thumb\|300x300px\|Atari 800 Logic Board]]<br>
			\| [[File:Atari 400 800 Home Computer Schematics.pdf\|alt=Atari 400 / 800 Schematics\|center\|thumb\|Atari 400 / 800 Schematics]]<br>
	\|}		\|}

	For detailed service ~~information, see~~ the [[Atari 800 Field Service Manual~~]] and [[~~Atari 800 ~~Schematics~~]].		Official service manuals and schematics are available via the [[Atari 400 800 Field Service Manual June 82\|Atari 400 / 800 Field Service Manual]]

	== 📷 Gallery ==		== 📷 Gallery ==

Josh: Automated update by bot

2025-05-09T16:43:01Z

Automated update by bot

New page

{{Infobox computer
| name = Atari 800
| image = [[File:Atari800.jpg|250px]]
| caption = Atari 800 Home Computer (1979)
| manufacturer = Atari, Inc.
| type = Home Computer
| release date = November 1979
| discontinued = 1983
| price = US$995 (1979)
| cpu = MOS Technology 6502 @ 1.79 MHz (NTSC) / 1.77 MHz (PAL)
| memory = 8 KB – 48 KB RAM (user expandable), 10 KB ROM
| storage = External cassette tape (410/1010), optional 5.25" floppy disk drive (810/1050)
| display = 40×24 text, up to 320×192 pixels, 128 colours (NTSC: 16 hues × 8 luminance)
| sound = 4 voices, 3.5 octaves (POKEY chip)
| dimensions = 48.3 cm × 34.3 cm × 10.2 cm
| weight = 5.4 kg
| os = Atari OS (in ROM), Atari BASIC (cartridge)
| predecessor =
| successor = [[Atari 800XL]]
| codename = Colleen
| model = 800
| logo = [[File:Atari 800 logo.svg|250px]]
}}

The '''Atari 800''' is an 8-bit home computer introduced by Atari, Inc. in late 1979, designed as a robust, expandable system for the home and education markets. It was part of the original Atari 8-bit family, featuring advanced graphics and sound capabilities for its era.

== 🧠 Architecture and Processor ==
The Atari 800 is built around the '''MOS Technology 6502''' microprocessor, running at:
* '''1.79 MHz''' (NTSC systems)
* '''1.77 MHz''' (PAL systems)

The system architecture is highly modular, utilising custom coprocessors:
* '''ANTIC''' (Alphanumeric Television Interface Controller) – handles display list processing and graphics DMA.
* '''CTIA/GTIA''' (Color Television Interface Adapter / Graphic Television Interface Adapter) – manages colour, sprites (player/missile graphics), and collision detection.
* '''POKEY''' (Potentiometer and Keyboard Integrated Circuit) – responsible for sound, keyboard scanning, and serial I/O.

This coprocessor-based design enabled the Atari 800 to deliver advanced multimedia features and flexible video modes.

== 💾 Memory and Storage ==
The Atari 800 shipped with:
* '''8 KB RAM''' standard (early units), expandable to '''48 KB RAM''' via plug-in memory cards.
* '''10 KB ROM''', containing the operating system and built-in diagnostics.

Storage options included:
* '''Atari 410/1010 Program Recorder''' – external cassette tape drive for data and program storage.
* '''Atari 810/1050 Disk Drive''' – optional 5.25" floppy disk drive for faster, more reliable storage.
* '''Cartridge slot''' – for instant-load software and BASIC interpreter.

== 🖥️ Display and Graphics ==
Graphics capabilities were a major strength of the Atari 800, driven by the ANTIC and CTIA/GTIA chips:
* '''Text modes:''' up to 40 columns × 24 rows.
* '''Graphics modes:''' resolutions from 40×24 up to 320×192 pixels.
* '''Colour:''' up to 128 colours (NTSC: 16 hues × 8 luminance levels).
* '''Sprites:''' 4 "player" and 4 "missile" hardware sprites (player/missile graphics) with collision detection.
* Smooth scrolling, programmable display lists, and fine control over video memory.

These features allowed for arcade-quality visuals and animation, setting the Atari 800 apart from most contemporaries.

== 🔊 Sound Capabilities ==
Audio is provided by the '''POKEY''' chip, offering:
* '''4 independent audio channels''' (voices).
* Each channel covers '''3.5 octaves'''.
* Programmable frequency, volume, and distortion settings.
* Additional features: random number generation and keyboard scanning.

The POKEY's flexibility enabled a wide range of sound effects and music, making the Atari 800 popular among game developers.

== 🎮 Input/Output and Expansion ==
The Atari 800 was designed for expandability and robust I/O:
* '''Two cartridge slots''' (one primary, one auxiliary) for software and hardware expansion.
* '''Four joystick ports''' – compatible with Atari-style controllers.
* '''Peripheral Interface Bus (SIO)''' – daisy-chain connection for disk drives, printers, modems, and cassette recorders.
* '''Composite and RF video outputs''' – for connection to TVs and monitors.
* '''Parallel bus expansion slot''' (underneath) for memory and future upgrades.
* '''Full-travel keyboard''' – 57 keys, including function keys and a HELP key.

The system's modular design and shielded, rugged case made it suitable for both home and educational use.

== 🔍 PCB Schematics & Service Manual ==
<templatestyles src="Template:StyledTable/styles.css" />

The Atari 800 consists of a main logic board and plug-in memory cards. Its robust, shielded construction was intended to meet stringent FCC requirements for home electronics.

{| class="wikitable styled-table" style="width:80%; text-align:center;"
! style="background-color:#f2f2f2;"| Main Logic Board
! style="background-color:#f2f2f2;"| Memory Board
|-
| [[File:Atari800_Mainboard.jpg|thumb|center|300px|Atari 800 Main Logic Board]][[File:Atari800_Schematic.png|center|thumb|Atari 800 Main Board Schematic]]
| [[File:Atari800_MemoryBoard.jpg|thumb|center|250px|Atari 800 16 KB Memory Board]][[File:Atari800_MemorySchematic.png|center|thumb|Atari 800 Memory Board Schematic]]
|}

*For detailed service information, see the [[Atari 800 Field Service Manual]] and [[Atari 800 Schematics]].*

== 📷 Gallery ==
<gallery mode="packed" heights="200">
File:Atari800.jpg|Atari 800 front view
File:Atari800_rear.jpg|Rear panel with I/O ports
File:Atari800_Mainboard.jpg|Atari 800 main logic board
File:Atari800_MemoryBoard.jpg|Plug-in memory card
File:Atari_410_Cassette.jpg|Atari 410 Program Recorder (cassette)
File:Atari_810_Disk_Drive.jpg|Atari 810 5.25" floppy disk drive
</gallery>

== 🧪 Related Pages ==
* [[Atari 800 General Maintenance]]
* [[Atari 800 Troubleshooting Guide]]
* [[Atari 800 Keyboard Repair Guide]]
* [[Atari 800 Capacitor Replacement Guide]]
* [[Atari 8-bit Family]]

[[Category:Atari 8-bit Computers]]
[[Category:Atari Systems]]

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