From: Gideon Zweijtzer (gideonz_at_dds.nl)
Date: 2002-05-02 06:27:27
>Hallo! > >If you want to be flexible, maybe you want to have a look at my CS/A65 >machine. The CPU card has a 74LS610, which maps addresses: > > [...] >So each of the 16 4k blocks can be mapped from a 1M address space >separately. >Maybe you also want to include this in your CPU... > >Andre Thank you Andre, for your input. The new CPU will have a more elaborate MMU unit, and will certainly include the basic mapping possibilities that you described. The goal is to provide a way to run multiple original 6502 code pieces anywhere in system memory at the same time, for each of those "thinking" that they are running from $0000-$ffff. Another feature will be protection and bus-selection. The latter is necessary to define regions that are not memory, but I/O. Memory accesses will go to the SDRAM bus, I/O accesses to the original address/data bus. Gideon Message was sent through the cbm-hackers mailing list
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