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Info for 990189v


TM 990/189 University Board microcomputer with University Basic and Video Board Interface

Usage:
This driver emulates a TM990/189 with University Basic and the optional Color
Video Board.
You can use all the video opcodes documented in the University Basic Manual.
The optional demonstration EPROM set includes demonstration programs. They can
be loaded with LOAD 0, LOAD 1, LOAD 2 and LOAD 3. Some programs are supposed to
do some user interaction, but they were set up in demo mode, so that you must
edit the source code to run the programs: for instance, to play the brick-wall
game, you must type 'LOAD 2', then '5 SP=0' to disable demonstration mode,
then 'RUN'.
There is one undocumented built-in Basic function that can be used if you have
the demonstration EPROMs installed: JOY. This instruction is not fully
implemented in University Basic, and it relies on an assembly language
subroutine located on the Demonstration EPROMs. "JOY 0" reads the analog
X-axis for joystick 1, "JOY 1" reads the analog Y-axis for joystick 1, "JOY 2"
reads the button state for joystick 1, "JOY 2" reads the analog X-axis for
joystick 2, "JOY 3" reads the analog Y-axis for joystick 2, "JOY 4" reads the
button state for joystick 2.

History and Trivia:
The Color Video Board was released in 1980. It includes a TMS9918 VDP, a
joystick interface, and two EPROM sockets. The VDP enables to display colorful
graphics on a video monitor.
This board was not designed by TI, but an external society (Eyring Research
Institute).


Generated on Sun Sep 21 17:27:54 2003