1/1 
|
Re: T80 bugfix for INI, IND, INIR, INDR, OUTI, OUTD, OTIR, OTDR
by Unknown on Dec 8, 2005 |
Not available! | ||
|
let me know as well if you could. I remember going round this, and I think
the www.fpgaarcade.com version is correct. diff the microcode. if so, I should really merge it back to OCs /Mike Guy Hutchison writes:
Hi Peter,
We spoke a while back, and you mentioned the JR bug recently on the
list. I had a little time today to look in to it, and was wondering
if you could elaborate on what the bug is.
According to the Z80 handbook, the cycle timing for a JR operation is
4/3 if the test fails, and 4/3/5 if the test passes. This matches the
mcycle coding in the microcode as well as the results I see in
simulation.
Could you (re)summarize the problem for me?
Thanks,
Guy
_______________________________________________
http://www.opencores.org/mailman/listinfo/cores
|
|||
1/1