Den Thu, 29 Nov 2018 18:17:57 -0600 skrev Segher Boessenkool <segher@kernel.crashing.org>: > On Fri, Nov 30, 2018 at 12:48:17AM +0100, silverdr@wfmh.org.pl wrote: > > I've got a question I can't answer out of my head and can't > > currently set any test bench for - how does the 6502 and 6510 > > behave when it comes to getting off the bus. I know we can make > > 6510 off the address bus with the additional line that is not > > available in 6502 but the question is: does any of the two > > (especially 6510, which surely has the ability) get off the bus by > > itself like during other phase of the clock cycle? > > The 6502 always drives all address pins. The 6510 whenever AEC is > high. Afaik the 6502 also drives the data bus and other signals even in it's "inactive" halv cycle. Otherwise the VIC 20 wouldn't had to split the data bus in a "CPU" and "VIC" part. -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies.Received on 2018-12-05 14:02:24
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