On 22/05/2018 13:29, Michał Pleban wrote: > Doesn't it? We have recently determined that the 6509 drives it. I have > no idea about the 6510, but I would expect it to be the same. I don't personally know, just repeating what I read. *groepaz * *Posted: Fri Apr 24, 2015 8:31 pm Post subject:* *when writing, the address will appear on the bus, however the data will go to the cpu port register. still the cpu will enable write on the bus, and the last value that appeared on the databus before will get written to ram. see here: * https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/general/ram0001/ I thought the 6509 was the same, which was that it didn't drive the data bus either & Jim had decided to reproduce this on his newer 6509 replacement board.Received on 2018-05-22 15:01:55
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