[Techtoolslist] Using the 9010 to fill a block of RAM

[John Robertson]

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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