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Texas Instruments TI-99/4A

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1979.

A small computer that found its way to Sweden, but it was not as popular as in its home country the United States. It was, however, not as popular as, for example, Commodore VIC 20 and C64, Atari 400 and 800, Apple ][-series or Tandy Coco. However, it was a sufficent number who had it as their first computer and learned to program on it. It was actually one of the very first 16-bit home computers that came onto the market. Most programs were run from cartridges called command modules.

Unfortunately, it had some weaknesses compared with the competitors. Here are a few;
You used an ordinary tape recorder, but had to make a fuss with cables and volume. Commodores dataset, for example, were much more reliable when reading and storing.
It required a BIG expansion box if you wanted to add more memory.
It was rather slow in BASIC (but not in machine code).

Is there any errors? e-mail and correct me!

 

 

Former owner: Kommunens returmarknad, Umeå

Technical data

 
Year 1979
Origin USA
Manufacturer Texas Instruments
Name TI-99/4A
CPU TI TMS9900
Speed 3,3 Mhz
OS TI Basic
ROM 26 KB
RAM 16 KB up to 52 KB
I/O ports Cartridge slot in front, expansion, com port, RGB video, joystick
Text modes 32 x 24 wiht 16 colours, 40 x 24 with 2 colours
Graphic modes 256 x 192
Colours 16
Sound 3 channels, 5 octaves
Built in media  
Power supply External