Hello! Mia Magnusson wrote: > Btw the original schematics (CBM_8088_CPU_co-processor_schematic.pdf) > is hard to read. Just to make sure, is it indeed an 6525? All pin > numbers / signals match a 6525 while the schematics says "6523" which > seems like a bad copy. There is a 6525A in my board. But the board uses the chip only for I/O pins, so I presume you can use either 6523 or 6525. > If you are anyway going to change the construction, maybe you should > consider some dual port ram? Although probably both more expensive and > harder to get, it would be far nicer and probably faster too. I was thinking about dual-port RAM to simulate video RAM, so that the 8088 could write to it simultaneously with 6509 reading from it and copying to CBM-II video RAM. But this kind of setup might be complicated. Regards, Michau.Received on 2018-03-26 12:07:39
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