Questions for someone who knows some about ram and roms...

[amigadave]

I believe 1.3 fits into 256k when loaded, but 3.1 takes up 512k, so it probably was a problem of running out of memory on a 1mb total RAM machine.

[amigadave]

Piru wrote:
3.1 indeed takes a bit more memory than 1.3 (but not 512KB vs 256KB, that's just nonsense).

Additionally some demos just fail to work with anything else than KS 1.2/1.3.

My mistake in the way I worded my post, but if you read the original post, he clearly states that the demo DOES run with the 3.1 ROM installed if more RAM is connected to his A500, so it is a RAM problem, not the KS ROM.

I think the original poster is mistaken that when the 1.3KS is installed his trap door memory is Fast RAM.

[amigadave]

mongo wrote:

Apparently the 3.1 rom I had installed has "moved" my trapdoor ram to Chip ram without any other hardware modification otherwise. I did not replace the AGNUS however.

That's not possible.

I think the 6a version motherboard came with the later 1mb Agnus, or was that only the 8a A500+?