You're close to the actual program with your pseudocode. Why not take a stab at writing it? I have something close to what you want, but I'm not home to share it right now.
On Jan 28, 2015, at 5:06 PM, John Robertson <jrr@flippers.com> wrote:
I'm hoping one of you code jockeys knows a simple program for filling a block of memory on the 9010 - in this case with FFs.
I'm looking for something like:
*Begin at address xxxxh write FFh, ** ** **Increment counter by 1 store, ** ** **Compare counter with yyyyh - if equal goto Finish** ** **Loop back to Begin** ** **Finish*
I think I just about wrote the program, but it would take me up to a couple of hours to get it to work (I'm a heck of a lot better on hardware).
Why do I want this? Well, I am finding that the AnyPin device we sell is loaded with 00s, and the early Williams games don't seem to like that, so I want to load them with FFs and see if that works better. A 5101 is only 4 bits wide, so I made a simple adapter that puts a second 5101 in parallel (address and selects) with the original and the four additional data lines (D4 - D7) go to a Glomper clip that fits over a handy ROM to get those connections. Now I can test the 5101 in the game using the standard built in RAM tests.
Thanks!
John :-#)#
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