Peter Evans
90892c32e4
Add TSB (Test and Set Bits) instruction
...
This commit also moves the TRB code from loadstor to bits, which is
where it should have been all along.
2018-02-22 13:39:48 -06:00
Peter Evans
a4c3d1c4ef
Implement the TRB (Test and Reset Bits) instruction
2018-02-22 00:39:33 -06:00
Peter Evans
807362e871
Add STZ instruction (to store zero)
2018-02-22 00:02:57 -06:00
Peter Evans
8e1ab0e950
Add support for PHX, PHY, PLX, PLY
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These instructions allow you to push and pull (pop) the X and Y
registers via the stack.
2018-02-21 23:32:57 -06:00
Peter Evans
2f777ce881
Several core changes to status, soft switches
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Regarding soft switches, we had several we should have been listening
for on both reads and writes, but were only doing so on writes; this is
now fixed.
Regarding statuses, we were incorrectly calculating both carry and
overflow. This should now be fixed, although some quick examinations of
disassembly output suggest there is something else amiss. Debugging will
continue shortly.
2018-01-20 21:01:26 -06:00
Peter Evans
7d6886a3a8
Change last_addr field to eff_addr
2018-01-12 13:57:48 -06:00
Peter Evans
8d9b48912e
Add memory injection to 6502; main memory in apple2
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Note that memory _is_ now managed in apple2, and _not_ in mos6502.
2018-01-10 21:28:05 -06:00
Peter Evans
1de1e7788a
Rename status flags to MOS_
2018-01-05 14:18:39 -06:00
Peter Evans
3954b1647f
Missing status modifications in a number of instructions
2017-12-08 23:26:46 -06:00
Peter Evans
0336fe7366
Documentation for files
2017-12-08 22:12:31 -06:00
Peter Evans
ccd7a3f665
Moar documentation
2017-12-06 18:01:13 -06:00
Peter Evans
3cebed2377
Adding all of the instruction files
2017-12-02 13:05:53 -06:00
