Anyone have a source for ram chips for the A2058?

[Pat the Cat]

Might be worth sniffing out local Hackerspace / Makerspace?

They get stuff donated, also members can have hoards of retro gear for "projects" (unfulfilled dreams).

You might have an issue with RAM on the A2091 - you can't set an A2058 to have 6MB... and you can only have 8MB total fast RAM? On a 68000 Amiga?

And you do want some RAM on the A2091 to let it use DMA.

[Pat the Cat]

I reckon the beans on this is if you can map the full 8MB to a place other than where the A2091 RAM goes.

With software that is. It did come with software but I've never played with an A2058.

5adly a link to an Amiga memory map is currently missing. What follows seems a little lacking.

http://oscomp.hu/depot/amiga_memory_map.html

I think you do have an extra 1.5MB space in the memory map, C00000 slow RAM, but you only have 16MB total space on a 24 bit address bus.

[Pat the Cat]

I don't see how you could do it with a 68000.

You might be able to do it with a co-processor card, but it's only going to be 16 bit access speed. Rather than RAM on the coprocesser card itself accessing 32 data bits at one gulp. Possibly more (Burst? I thought you need very special RAM for that., 68030 (up?).