On 12/12/2013 06:31 PM, firstname.lastname@example.org wrote: > So, I thought about a CPLD solution that would "massage" the 6551 > registers to fit a 16550 or similar device. But, then, I decided if I > was going to massage an interface, why not massage the interface to a > uC. That would allow many peripherals to be created. > So, that's my goal. We'll see how far that goes. I found some Verilog > for dual port registers, which seems useful. Don't forget, that when reading from the 6551-lookalike, you have less than 500ns (in a C64) to figure out what the 6502 wants and supply the correct data. Not a problem for the hardware, but if you want to emulate a 6551 in part with a controller, that's quite tight. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2013-12-12 18:00:45
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