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General| Manufacturer | Atari |
|---|---|
| Type | Home computer |
| Release year | 1982 |
| CPU | MOS Technology 6502C |
| CPU Speed | 1.79 MHz |
| RAM | 64 KB |
| ROM | 24 KB |
| Display Resolution | 320 x 192 |
| Display Colors | 256 |
| Operating System | Atari DOS |
| Graphics | ANTIC |
| Sound | POKEY |
| Storage | Floppy disk, cassette |
| Ports | Cartridge, joystick, monitor |
Steps for connecting the TV Switch Box to the antenna or cable.
Connecting the switch box cable to the TV's VHF input.
Guidance for when the ATARI 1200XL display does not appear on the TV.
How to access the self-test menu and options using the HELP key.
Explains ROM and RAM testing, visual indicators of results.
Describes testing of sound voices and color capability with musical examples.
Explains keyboard layout testing and key response feedback.
FCC compliance and troubleshooting interference with radio/TV reception.
Warning about using only certified peripheral equipment.
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