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.

Title image
Manufacturer Texas Instruments
Processor 9900
Speed (MHz) 3
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 TI99/4 Brochure page 6 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
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 TI99/4 Brochure page 6 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