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The Machine Room is Back!
This is the recovered Machine Room from 2005. Please don't expect wonders. The look and feel of this site is nine years old, and so is its code. Some of the functionality has been recovered while the rest of the site is modernised and restructured. Watch this space!
Top :: Browse :: Texas Instruments :: TI-99/4A

Texas InstrumentsTI-99/4A

[Image: ]
Here's what the plastic case style looks like. I always thought the silver and black version was a bit more elegant.
337x198 JPEG file (5.49 KiB). Contributed by alexios (more pictures like this). Unrated (0 votes).
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Entry quality: 1 | Rate this entry: Rated 1.00 (1 vote). | 14617 hits | Admin: alexios
No known owners (I still own one | I used to own one). I have seen one.
Search Google or Ebay United States for Texas Instruments TI-99/4A (more links, auctions & searches)
Other series members
TI-99/2, TI-99/4, TI-99/4A, TI-99/8.
Quick View
Units Produced 2,500,000
Pricing 29,000.00 GRD (Greece, 1985)
Emphasis Education, Gaming, Programming
Timeline Released: 1981
CPU type TMS-9900
CPU word length 16 bits
CPU clock rate 3.3 MHz
ROM Size 26 KiB
RAM Size 16.3 KiB
Maximum RAM Size 48 KiB
Keyboard Non-standard QWERTY typewriter keyboard
Number of keys 48
Graphics chip TMS-9918A
Graphics modes 256x192x16, 64x48x16
Text modes 32x24x16, 40x24x2
Total number of colours 16
Sound chip TMS-9919
Sound channels 3
White noise channels 1
Octave range 8
Volume/DAC resolution 16
Sound output Mono
Cassette tape speed 450 bps
I/O Ports 2x Joystick, 2x Tape recorder, Cartridge, Composite video, Expansion

More technical info...

Acknowledgements

Thanks go to the following people for contributing information to this entry.