a500 problem. What do these games have in common?

[Generale]

Hey everyone.

I bet you are all wondering why I am asking about games in the hardware section.
Well, it's because my a500 seems to have a problem with them.

I have varying degrees of success with different games. It seems like there is some unknown problem in hardware causing them to stuff up.

Here's a few games which don't work properly:

* Gem'X (gfx go scrambled and guru in game)
* Cannon Fodder (can't advance past loader)
* Theme park (playable. Ground tiles don't load and heaps of artefacts)
* Sink Or Swim (Can't start a game. menu works)
There are more I can't recall. It's always garbled graphics and then a guru.

Heres some that do:

* Prince of Persia
* Arkanoid
* Chase HQ
* Ghosts 'n Goblins

I haven't had any problems with apps. Even DP-IV works flawlessly. I have tried multiple sources of the games. Same errors. They work in an emulator with the same setup.

What could be the cause of my problems? I figure it's either the 512k ram expansion, 512k gfx memory, agnus or denise.

[Generale]

I didn't realise that.
I could understand cannon fodder needing 1mb I guess.
If I ever get the $$$ I'll get the ecs agnus and denise. I know they don't cost much from vesalia, but it falls pretty low on my list of things that need money thrown at them.

If I could be bothered right now I'd try a few other games out. It's just a little time consuming copying across. Dumping to floppy is the easy part.

That's right... There's a game that came with the other a500 that glitches out too. I never tried it on the other a500 though. Only on my main one.The game is called 'star war'.

Can anyone suggest a game that is known to work with ks1.3 and 512k chip, 512k expansion?
I'll dump it across and see what happens. Too many things give similar results.