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Published 20 hours ago • verified publisher icon KimJorgensen

REU emulation

Open matti157 opened this issue 4 years ago • 5 comments

Will it be possible to emulate a REU in the future?

matti157 avatar Dec 22 '20 01:12 matti157

I think that is unlikely with the current hardware. The microcontroller only has 192kB of RAM and a large portion of that is used by the firmware to speed up execution. Another issue is that the DMA line is not connected and there are no free pins on the microcontroller.

KimJorgensen avatar Dec 22 '20 18:12 KimJorgensen

Forgive me for writing nonsense, but I'm not a very experienced programmer :)

1-If the CPU has even only 8-16K free it can be interesting to have the REU functionality even just to give some more features to the Kung Fu Flash. It would be handy to load a monitor assembly or similar

2-By creating a special empty file on the SD, can't that be used as virtual RAM? Too slow compared to the 80s RAM that Commodore used?

Anyway I bought a KFF, congratulations it's fantastic!

matti157 avatar Dec 23 '20 01:12 matti157

how many is exactly free? From a quick glimpse of the source code I would say 64+32K?

smdprutser avatar Jan 02 '21 19:01 smdprutser

Yes, that is right

KimJorgensen avatar Jan 03 '21 08:01 KimJorgensen

I expect with the release of Sonic 64 people will be looking for something like KFF but with REU support.

beamrider66 avatar Dec 19 '21 18:12 beamrider66