Texas Instruments TI99/4a
A fairly early entrant into the home computer scene, this machine was initially released in the UK as the TI99/4 with an NTSC-only video output. After realising that nobody in the UK had anything that could display NTSC pictures, the machine was re-released as the TI99/4a with a PAL video output.
Rather uniquely for its time, the machine used a 16-bit processor rather than the more common 8-bit ones.
Production of this machine was stopped in November 1983.
Manufacturer
Texas Instruments
Processor
9900
Speed (MHz)
3.0
RAM (KB)
16
RAM expandable to (KB)
72
ROM (KB)
26
Sound
3 channels
Keyboard type
Typewriter-style
Number of keys
48
Dimensions (mm)
381x259x71
Weight (g)
1800
Interfaces
- Expansion port (44 pin)
- Cassette interface
- Joystick interface
Related Images
TI99/4 Brochure page 1
TI99/4 Brochure page 2
TI99/4 Brochure page 3
TI99/4 Brochure page 4
TI99/4 Brochure page 5
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TI99/4 Brochure page 7
TI99/4 Brochure page 8
TI99/4 Brochure page 9
TI99/4 Brochure page 10
TI99/4 Brochure page 11
TI99/4 Brochure page 12