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General| Manufacturer | Texas Instruments |
|---|---|
| Model | TI-99/4A |
| Type | Home Computer |
| Release Year | 1981 |
| CPU | TMS9900 |
| CPU Speed | 3 MHz |
| RAM | 16 KB |
| RAM Expandable To | 48 KB |
| ROM | 26 KB |
| Graphics | TMS9918A |
| Display Resolution | 256 x 192 |
| Text Mode | 32 x 24 |
| Colors | 16 |
| Operating System | TI BASIC |
| Keyboard | Chiclet keyboard |
| Storage | Cartridge |
| Optional Storage | Floppy disk drive |
| Ports | RS-232 |
| Optional Ports | Parallel printer port |
Provides specific solutions for issues like power failure, display problems, and input device malfunctions.
Explains the special functions of keys like 1/!, 2/@, 3/#, 4/$, 5/%, 6/A, 7/&, 8/*, 9/(, 0/), and +/=.
Introduces peripherals like cassette recorders, disk drives, joysticks, monitors, printers, memory expansion, speech synthesizer, and modems.
Provides detailed instructions for creating backup copies of cassette and disk software.
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