Hallo Nick, IMHO a 8237 is a generic DMA handler on itself. Very roughly said, the REU is equivalent to two 8237's plus a refresh mechanism. Unfortunately the registers don't match :( > * Marko's REU clone IMHO the REU is so specialised that you either have to design a full replacement for it or use something 'simple' like GEOS-RAM. > * Ruud's PC card The problem with PC-Card is the huge amount of glue logic needed, not the DMA part. > * my core accelerator ideas and a 64HDD Ramlink equivalent.... 64HDD uses a PC-motherboard as core of the desig. It sounds very logical to me to use its onboard DMA in the first place. And if you have other DMA-ideas, I still would use the 8237 as there is enough info available how to interface it to your system and how to program it. ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://Ruud.C64.org Message was sent through the cbm-hackers mailing list
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