Thanks. This is a new topic for me - what's a dummy read? Something that happens when doing an STA on a referenced address? The VICE monitor has come a long way since I last used it! Usually on real hardware. :-P -Leif -- Leif Bloomquist | firstname.lastname@example.org | +1 416-737-2328 | Check out my blog! http://www.jammingsignal.com "Every choice, no matter how small, begins a new story." - xkcd On Mon, May 9, 2016 at 1:51 PM, Kajtár Zsolt <email@example.com> wrote: >> you can use VICE to examine what happens: >> >> go to monitor and put a tracepoint on $df00: >> >> (C:$e5cf) trace df00 >> TRACE: 2 C:$df00 (Trace load store) >> (C:$e5cf) x >> >> ...leave monitor, do poke 57088,123 and enter the monitor again, you see this: >> >> #2 (Trace load df00) 213 049 >> .C:b82a 91 14 STA ($14),Y - A:37 X:37 Y:00 SP:f9 ..-...ZC 82195204 >> #2 (Trace store df00) 213 049 >> .C:b82a 91 14 STA ($14),Y - A:37 X:37 Y:00 SP:f9 ..-...ZC 82195204 >> >> so, what you are seeing is the dummy load that happens before the actual store >> :) > > Apart from the wrong cycle numbers it's just the regular dummy read for fixing > up the high part of address after indexing. It's expected as it's not optional > for a write. > > -- > -soci- > Message was sent through the cbm-hackers mailing listReceived on 2016-05-09 20:00:02
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