> Now I have the idea that what you mean with DMA is what the REU does: it > copies/swappes an amount of memory situated outside the C64 from/to/with an > amount of memory inside the C64. I haven't thought about this idea. But you > need two 8237's to perform this trick. And then you need 32 bytes for the > DMA alone. I've never used the thing and perhaps I misunderstand what you're saying, but you shouldn't need two 8237s. Memory to memory is done with two DMA channels, channel 0 is the source and channel 1 is the destination. and (iirc) the chip is accessed through 16 locations, 4 address lines, and each access toggles a fifth internal address bit and there's a command to reset that bit to a known state. bogax - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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