Manufacturer |
Texas Instruments |
Name |
TI 99/4A |
Type |
Homecomputer |
Origine |
USA |
Introduction Date |
June 1979 |
End of production |
1984 |
Built in Language |
TI Basic |
Keyboard |
QWERTY full-stroke keyboard, 48 keys, 2 x SHIFT, CTRL, ALPHA LOCK, FCTN |
CPU |
TI TMS 9900 (with 256 bytes 'cache', actually it accesses to 256 bytes of RAM) |
Speed |
3.3 Mhz |
Coprocessor |
TMS 9918 (TMS 9929 in Europe) - Video / Sprite |
Amount of Ram |
256 bytes - Memory expansion card can be added : 4 KB or 32 KB (up to 52 KB) |
Vram |
16 kb |
Rom |
26 KB: 8 KB ROM connected to the CPU + 18 KB ROM in byte-serial bit-mapped circuits (usually known as GROM, Graphic Only Memory) |
Text Modes |
32 x 24 (16 colors), 40 x 24 (2 colors) |
Graphic Modes |
Multicolor mode : 48 x 64 with 16 colors, 256 x 192 with 16 colors (only accesed via machine code), Sprites (only with TI-Extended Basic) |
Colors |
16 |
Sound |
3 channels, 5 octaves (110hz to 55khz) and 1 noise channel (periodic and white) |
Size / Weight |
38 x 25,5 x 6 cm / 2,15 kg |
Built in Media |
None |
I/O Ports |
Tape interface, RGB video, Joystick (2), cartridge slot (Solid State Cartridge) |
OS |
TI's own system, but a p-code card could be added, which gave access to the UCSD p-system and a Pascal compiler. |
Power Supply |
Special TI external PSU (pins 1,2 : 16v / 1,6A -- pins 2,4 : 8v / 0,15A) |
Introduction Price |
??? |
Sold |
??? |
Serial Number |
??? |
Other Extras |
None |
Bought Where |
Germany (Berlin) |
Bought When |
24/11/02 |
Condition |
??? |
Price Paid |
13 € |
Specs of my Model |
??? |
Setup Today |
??? |