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Info for ti990_4


====== Texas Instruments Model 990/4 Minicomputer System (1976) ======




===== Usage =====

This driver emulates a TI990/4 CPU with 32kbytes of RAM, a FD800 disk controller at CRU base >0040 (>0080), and a 733 ASR at CRU base >0000.

This in enough to run various floppy-based programs that have been dumped by Dave Pitts. Please refer to http://www.cozx.com/~dpitts/ti990.html -- http://www.cozx.com/~dpitts/ti990.html if you are interested in getting a copy of these programs or seeing another ti990 emulator.



===== Known Issues =====

The controller panel is not emulated yet.



===== History and Trivia =====

The TI990/4 board was released in 1976. It is built around a tms9900. While not as powerful as the high-end 990/10 and 990/12 boards, it was a lot cheaper. It was used as a terminal concentrator in large TI990 systems, and also as the base of various development systems.

See the entry for TI990/10 for a short rundown of the TI990 series.



===== Links =====

* David Pitts' Page -- http://www.cozx.com/~dpitts/ti990.html




Generated on Sun Jul 19 10:17:28 2009