Amiga 500 Rev 5. and ECS chip set...??

[zipper]

Or get a rev6A mainboard and the appropriate chips and no hacks necessary...

Same hacks but physically different - instead of cutting a trace (rev5) you need to alter a 3pin jumper pad making a cut and connect job there (rev6); a little less opportinity of doing damage. The other jumper job is similar in rev5 and 6.

[zipper]

Well, I think AlienF1 (Virtual GP demo) needed 2 MB. But it was an AGA game; just happened to run on my 2 MB Chip ECS A500 with 060 steroids - wrong colours of course...