Hey there!
I think this is a hardware topic and not a software one.
I've noticed something a little 'odd' about the A500 I'm using.
I've just been dumping ADF games to floppy so I can play them on my A500, and noticed something.
Every game has nasty glitches. eg. Gem'X scrambles and then gurus during gameplay. Theme park's ground tiles are missing, etc. I may be wrong, but this looks like unhappy RAM to me. It may be something else. I don't know.
If it is RAM, is there a program that will run in wb1.3 that can do exhaustive tests?
Thanks.