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 :-#)# -- How to subscribe or unsubscribe from TTL http://seven.pairlist.net/mailman/listinfo/techtoolslist _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/