Peter Evans
bb92162dba
Zero, not NULL.
...
Not that there's a practical difference, but we should be clear that
we're zeroing out memory because its contents are vm_8bit values, not
pointers.
2017-12-12 14:45:48 -06:00
Peter Evans
da62ac4ca6
Use double-slash comments
2017-12-12 14:35:13 -06:00
Peter Evans
6f4627802f
We should also NULL out segment memory.
...
Er... oops
2017-12-12 14:33:55 -06:00
Peter Evans
06705f21fc
Add mallocs for read/write tables, NULL-out code
2017-12-12 14:32:32 -06:00
Peter Evans
daab8a7f58
Add instruction strings (mapped to enum symbols)
2017-12-11 21:03:16 -06:00
Peter Evans
850fdc55b5
Add error codes to segment functions
2017-12-09 15:16:56 -06:00
Peter Evans
f44b029083
We need to check P's value as well
...
This test broke once we began to (properly) push P onto the stack.
However, I'm not _clear_ on whether we should push P before or after we
set the INTERRUPT bit... We'll go with things as-is for now.
2017-12-09 14:50:33 -06:00
Peter Evans
3954b1647f
Missing status modifications in a number of instructions
2017-12-08 23:26:46 -06:00
Peter Evans
b0aa6d400a
We should be pushing and popping status
2017-12-08 23:24:58 -06:00
Peter Evans
0336fe7366
Documentation for files
2017-12-08 22:12:31 -06:00
Peter Evans
50563b44a2
Close any open files we have
2017-12-08 17:09:58 -06:00
Peter Evans
cf62694ef0
Add option parsing code, tests
2017-12-08 17:06:21 -06:00
Peter Evans
8cd9c5ffab
Documentation, lacking
2017-12-06 21:25:47 -06:00
Peter Evans
ccd7a3f665
Moar documentation
2017-12-06 18:01:13 -06:00
Peter Evans
fca069d5de
Documentation
2017-12-06 17:16:20 -06:00
Peter Evans
12d0e5403a
Add documentation for the arith instructions
2017-12-06 17:03:37 -06:00
Peter Evans
d0dad61db8
Better documentation; use a macro to define modes
2017-12-06 16:54:14 -06:00
Peter Evans
102378640a
Proper indentation
2017-12-06 16:45:16 -06:00
Peter Evans
ffd2550364
Better documentation; log to stdout
2017-12-06 16:43:30 -06:00
Peter Evans
98f70e0a9a
Add functions for pressing/releasing keys
2017-12-06 15:21:39 -06:00
Peter Evans
0e02fb8a1a
Add struct, initial create function for apple2
2017-12-06 14:36:14 -06:00
Peter Evans
89ddd20658
Add read_byte function to return the next byte in memory
2017-12-05 20:40:35 -06:00
Peter Evans
50a84b4099
Remove cycles field from mos6502 struct
...
It was both unused and not necessary, as we can simply compute the
number of cycles in the execute function.
2017-12-05 20:23:17 -06:00
Peter Evans
5ada987c83
Add the execute function for the 6502
...
This executes a single opcode. Note this also makes a change to the
get_address_resolver function such that accepts an opcode, not the
address mode itself.
2017-12-05 19:01:43 -06:00
Peter Evans
eaaf63a069
Zero out last_addr and cycles
...
This fixes a super-annoying bug in the unit-test suite where we would
fail randomly because sometimes last_addr would have garbage in it.
2017-12-05 18:41:34 -06:00
Peter Evans
8454d1a6c9
Add instruction handler function, handler table
2017-12-05 18:38:36 -06:00
Peter Evans
54473be302
Add functions for instructions, cycles, and address modes.
...
This also adds a new table for cycles, and adds unit test functions for
the work as well.
2017-12-04 23:30:18 -06:00
Peter Evans
87de0a877a
Add all our tests, plus other fixes
2017-12-03 20:19:17 -06:00
Peter Evans
fe9ce3aca3
Tests for the new mos6502 functions
2017-12-02 13:27:30 -06:00
Peter Evans
3cebed2377
Adding all of the instruction files
2017-12-02 13:05:53 -06:00
Peter Evans
237d5e3cb6
First commit
2017-11-21 23:24:51 -06:00
