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Last modified 2012-06-28

Texas Instruments TI-99/4A

SPECIFICATIONS
Type:16-bit home computer
CPU:TMS9900 @ 3.3 MHz
Operating system:TI Basic
Memory:ROM: 26 KB
RAM: 256 Bytes (Expandable to max 52 KB)
VRAM: 16 KB
Sound:3 tones, 5 octaves plus noise (TMS9919)
Graphics:Max 256*192 pixels, 16 colors (PAL/SECAM: TMS9929A) (NTSC: TMS9918A/TMS9928A)
Storage:Tape recorder
Optional floppy drive in the optional PEB (Peripheral Expansion Box)
Input:Integrated keyboard
I/O ports:Game/joystick port, Cassette interface, expansion port
Cartridge slot, Composite video and TV/RF output, audio output
Voltage:5, 8 and 16 V from external transformer
Power consumption:
Dimensions (W*H*D):381*71*259 mm
Weight:2.3 Kg
Manufactured:1981-1983 (Discontinued)
Other:The later (June 1983) version had an all plastic beige case and keyboard to lower production cost.
Related documents:
Modifications:
Notable "ham" software: