TI 99/4A

TI 99/4A - 02
	   
The Texas Instrument TI 99/4A was a very succesful computer.
A large number ROM cartridges (36 KB each) were developped for
this computer, as the popular Extended Basic. 

Up to seven peripherals could be connected : 32 KB RAM extension,
RS232c, Disk controler (90 KB per disk, up to 3 disk-drives),
speech synthetiser, and so... 

(www.old-computers.com)
	   

Manufacturer Texas Instruments Name TI 99/4A
Type Homecomputer Origine USA
Introduction Date June 1979 End of production 1984
Built in Language TI Basic Keyboard QWERTY full-stroke keyboard, 48 keys, 2 x SHIFT, CTRL, ALPHA LOCK, FCTN
CPU TI TMS 9900 (with 256 bytes 'cache', actually it accesses to 256 bytes of RAM) Speed 3.3 Mhz
Coprocessor TMS 9918 (TMS 9929 in Europe) - Video / Sprite Amount of Ram 256 bytes - Memory expansion card can be added : 4 KB or 32 KB (up to 52 KB)
Vram 16 kb Rom 26 KB: 8 KB ROM connected to the CPU + 18 KB ROM in byte-serial bit-mapped circuits (usually known as GROM, Graphic Only Memory)
Text Modes 32 x 24 (16 colors), 40 x 24 (2 colors) Graphic Modes Multicolor mode : 48 x 64 with 16 colors, 256 x 192 with 16 colors (only accesed via machine code), Sprites (only with TI-Extended Basic)
Colors 16 Sound 3 channels, 5 octaves (110hz to 55khz) and 1 noise channel (periodic and white)
Size / Weight 38 x 25,5 x 6 cm / 2,15 kg Built in Media None
I/O Ports Tape interface, RGB video, Joystick (2), cartridge slot (Solid State Cartridge) OS TI's own system, but a p-code card could be added, which gave access to the UCSD p-system and a Pascal compiler.
Power Supply Special TI external PSU (pins 1,2 : 16v / 1,6A -- pins 2,4 : 8v / 0,15A) Introduction Price ???
Sold ??? Serial Number ???
Other Extras None Bought Where Germany (Berlin)
Bought When 24/11/02 Condition ???
Price Paid 13 Specs of my Model ???
Setup Today ???

Back view Serial Number

	   
	   
TI 99/4A-02:

Ebay on 24/11/02 a fellow collector who stopped collecting.
(www.compmuseum.de)
Received the package on 16/12/02

Bought these computers from the guy :

Atari 130XE_01 (16.50)
Atari 260ST_01 (13)
TI 99/4A_01 (22)
TI 99/4A_02 (7.20)

Paid 22.66 + 1 Shipping Costs
Total amount: 82.36