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| Model | Texas Instruments TI-99/4A |
| Type | Home computer |
| Released | June 1981 |
| Processor | TI TMS9900, 3MHz |
| Memory | 16K RAM, 26K ROM |
| Media | Cassette Tape drive Cartridge |
| Sound | 3 channels, 5 octaves, 1 noise |
| Graphics |
32 x 24 (16 colors), 40 x 24 (2 colors) 192 X 256, 16 color graphics |
| Ports |
ROM cartridge (on front) Data storage cassette Audio/Video output Joystick input CPU bus expansion |
| Power | Special TI external PSU |
| Monitor | - |
| OS | TI Basic |
The Texas Instruments TI-99/4A was an early home computer, released in June 1981, originally at a price of US$525. It was an enhanced version of the less successful TI-99/4 model, which was released in late 1979 at a price of $1,150. The TI-99/4A added an additional graphics mode, "lowercase" characters consisting of small capitals, and a full-travel keyboard. Read More
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