This is why I have tossed around the idea of making sets of roms to test the DVG & AVG. Lack of time or knowledge of 6502's prevents me. I figure it should be possible to execute sets of vector commands that exercise each chip or sub circuits within the vector generator and use the VSM halt to pass back a success (a watchdog would represent a fail). I'm guessing its possible, but I haven't worked out the details yet.
Jon
At 01:39 PM 10/31/2000 -0600, you wrote:
>Thanks Paul,
> Done that, its in the VSM, but why does the self test work, and not the game, and why does the manual loading of code in the vector memory to draw a plus on the screen work as well, but not the game. Basically, the fluke has eliminated, RAM ROM and MPU, I'm confused as to why the VSM would work on the internal board test pattern and the + Code (the code from the atari Cat box test procedure can be loaded thru the fluke to be executed by the VSM, at that point the drawing of the + on the screen is not CPU controlled but totally VSM ), but not work in game play ?
>
>
>Or better yet, what does the self test and + not execute thru the VSM that the Game play would get wacked on ?
>
>TomW
>
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Received on Tue Oct 31 15:39:12 2000
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