On 14/10/2016 11:35, Gerrit Heitsch wrote: > And don't forget, the DRAM controller came later, the 6566 was SRAM, > so it had to fit into whatever space they could find. That also > explains the weird multiplex address pinout. I need to track down who told me they had a decap of the 6566 and it looked like it was based on the dram design with traces cut. VIC2 was originally destined for a dram system, circumstances meant the 6566 was first out of the gate & that the p500 (the target machine) never went into full scale production. 6567 do multiplexed for dram and non-multiplexed for character rom, I would guess that has just as much to do with any weird pinout. Message was sent through the cbm-hackers mailing listReceived on 2016-10-14 11:02:29
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