On 7/18/2018 3:59 AM, Michał Pleban wrote: > Jim Brain wrote: > >> Well, it should not *HAVE* to be rewritten. It can, though, to support >> the '816. > If it's not rewritten, how will it access the DRAM when the 816 is used? When the unit boots, it boots into 6502 "mode", where $0 and $1 behave as before. Maybe I misunderstand the question. > >> On a real 6509, if you store $aa at $0 and read it back, do you get $0a >> or $aa? > It will read $0A. OK, thanks. That makes creating an 8 bit port version of the 6509 a bit tougher, but maybe still doable. Jim > > Regards, > Michau > -- Jim Brain brain@jbrain.com www.jbrain.comReceived on 2018-07-18 20:03:03
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