TI 990 console

TI 990 Page

Welcome to Dave Pitts' TI 990 web page. The above picture is my Texas Instruments (TI) 990/4 system that I have at home. I also have a TI-990/10 system with 256K of memory, DS10 disk and 911 VDT. I worked on the TI-990 from its inception, wire wrapped boards in a TI-960 chassis, until 1980. The first 990 was the 990/9 in 1973 and was built for a large Motel chain reservation system. I worked on the cross development environment for the Motel that ran on their PDP-10 and was written in ALGOL. The 990/9 was superceeded by the 990/10 and became commercialized with memory mapping and high speed disks on the TILINE (kind of like DEC's UNIBUS). The 990/4 came out with the advent of the TMS-9900 chip in 1976. The 990/4 was superceeded by the 990/5 (added the TILINE, more memory and three on board serial ports). The 990/12 was added to the product line and added hardware floating point, writeable control store and some other "goodies". I wrote and collaborated on parts of the Operating Systems (TX990 and DX10) and various utility programs, editors, compilers, assemblers and linkers.

In seeing some of the retro-computing effort on behalf of the TI 990 I've got some links that may be of interest:

You will want some "disks" to run with the sim990 program:

This home page is maintained by David Pitts. Please email dpitts@cozx.com with comments and corrections.
Last modified 2005/04/05.