From: Andre Fachat (a.fachat_at_gmx.de)
Date: 2002-04-28 20:51:38
Hallo! What about the 6509? That is a 6502 with the difference that it has 4 more address lines. The output values of the 4 address bits is determined by the values of register 0 and 1. register 1 is used for the data load and store operations in the lda (),y and sta (),y opcodes and reg. 0 otherwise. (r0/r1 maybe vice versa, but in principle that is it). This CPU is not available anymore as far as I know. So it would be good to have a hardware replacement for it. Andre Gideon Zweijtzer wrote: > |BTW: what's your opinion, should it be possible to modify your design > |for emulating a 8501 CPU (the heart of C16 / C116 / Plus/4)? > > Of course, that shouldn't be a problem; I think it is just a 6502 with some > tiny modifications. I am planning to implement the 65816 as well, since > there are many users. > > Gideon > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing list
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