> On 2016-01-21, at 21:18, groepaz@gmx.net wrote: >>>> >>>> If what you need is mirroring of a portion of C64 ram I have a FIFO >>>> based bus snooping design that could work, but I haven't had a chance to >>>> verify it. >>> >>> I'd also be interested in a design, as I have a few ideas that need such >>> an integration. I had been planning to implement 8 registers in a CPLD >>> with dual port access, but maybe there are better ways to do this... >> How do CPU carts access the RAM? I mean how the external CPUs do it from the >> EXPANSION port. > > using the DMA line (which halts the internal CPU and removes it from the bus) Well, that's what I mean - if all what's needed is to peek a few bytes off some location from time to time? Or is it supposed to be completely invisible to the system? -- SD! Message was sent through the cbm-hackers mailing listReceived on 2016-01-21 21:02:13
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