Hi,
Found this surfing the net for an answer, remember some sort of revisions, but this may explain it.
As mentioned in the post title, I have a 512k Rev 6a A500. The motherboard has additional socket spaces for another 512k of chip ram and the Agnus chip is rev 8372a #318069-02, which I believe supports up to 1mb chip ram?
To upgrade the memory to 1mb chip ram do I only have to populate the empty ram sockets and add in the necessary capacitors and Agnus will recognise the additional memory? Or will I have to also make changes to jumpers ie. JP2 or JP7?
I have 2 A501 512k trapdoor expansions so was thinking of using one as donor components as the chip versions match, then using the other as regular slow/fast ram in the trapdoor for a total of 1.5MB. Will that work?
I have also read an article on how to convert the A501 expansion into chip ram. Keen to know if anybody has done this hack and whether it's been successful and worthwhile.
So as you can see you may already have a hacked A500, if I get the fattest agnus chip for my A500, I may add chips to the empty sockets on the motherboard, then I have to cut some pad and wire going to the expansion port. If I had the time I would look it up in my Kazillion mods for Amiga computers. HMMM!!! it seems like I have a Karloss, anybody seen one.
smerf
