Radosław Kujawa
edab91de3f
Refactor bus reads and writes to split common code.
2017-02-25 12:54:15 +01:00
Radosław Kujawa
1f072e1b11
Somewhat better serial device. Still one way only.
2017-02-25 02:04:12 +01:00
Radosław Kujawa
97c7709dc7
Fix device offset computation in bus writes.
2017-02-23 23:04:45 +01:00
Radosław Kujawa
6f875e13e7
Make serial device sort of work. One way.
2017-02-22 22:46:10 +01:00
Radosław Kujawa
dcf275939b
Make bus read/writes possible to devices mapped anywhere, not only 0.
2017-02-22 22:43:58 +01:00
Radosław Kujawa
7ab946c5df
First attempt at adding serial port emulated via named pipe on host.
2017-02-22 21:58:41 +01:00
Radosław Kujawa
53f0136cab
Add cleanup function for RAM device. Also cosmetics.
2017-02-21 11:11:21 +01:00
Radosław Kujawa
ec235796c0
Merge branch 'master' of github.com:rkujawa/rk65c02
2017-02-20 21:32:22 +01:00
Radosław Kujawa
43e38e567d
Further adjustments to get device subsystem working.
2017-02-20 21:29:52 +01:00
Radosław Kujawa
5cec9a9784
More work on devices subsystem.
2017-02-20 12:31:26 +01:00
Radosław Kujawa
7baefe9277
Attempt to design a semi-flexible device subsystem.
2017-02-19 21:45:15 +01:00
Radosław Kujawa
2608ab5846
Better comments.
2017-02-17 12:45:22 +01:00
Radosław Kujawa
cc61646ba9
Fix carry flag setting in comparison instructions. Resolve #2 .
2017-02-15 21:58:42 +01:00
Radosław Kujawa
de1ab25427
Make runtime disassembly optional.
2017-02-15 21:38:51 +01:00
Radosław Kujawa
0b83a263d7
Introduce trace functionality.
2017-02-15 21:32:12 +01:00
Radosław Kujawa
6afb4531d5
The rk65c02_exec should return immediately after hitting breakpoint.
2017-02-15 19:56:22 +01:00
Radosław Kujawa
3286891ea8
Add missing prototype of debug_breakpoint_remove to include file.
2017-02-15 19:55:48 +01:00
Radosław Kujawa
ea5c09d7c0
Report failure when malloc errors.
2017-02-15 19:55:15 +01:00
Radosław Kujawa
3363959b87
Add breakpoints.
2017-02-14 11:17:40 +01:00
Radosław Kujawa
7db9b2f7c6
RMB1 instruction is 2 byte long (opcode + one operand).
2017-02-13 21:54:10 +01:00
Radosław Kujawa
c23136800a
Unbreak BBR and BBS - they access zero page, don't act like immediate.
2017-02-13 18:39:51 +01:00
Radosław Kujawa
8de5574aab
Handle accessing bus in zero page relative mode just as in zero page.
...
It should make things less awkward and still work fine, as the only
instructions using this mode are BBS and BBR. These only use first
operand as the address in zero page to read data from.
2017-02-13 18:37:14 +01:00
Radosław Kujawa
0cbbce4eeb
Fix operands fetching for zero page relative addressing.
2017-02-13 09:37:11 +01:00
Radosław Kujawa
7f1c27af75
Fix carry flag handling for SBC.
2017-02-12 23:27:36 +01:00
Radosław Kujawa
23105b4861
Hopefully fix decimal mode handling. Hopefully.
2017-02-12 22:56:07 +01:00
Radosław Kujawa
8f4900a877
Add simplified assemble_single_implied for implied addressing mode.
2017-02-12 21:54:07 +01:00
Radosław Kujawa
0fc79103f8
Well, once again...
2017-02-12 21:51:20 +01:00
Radosław Kujawa
1995569ec1
Fix prototypes for assembler functions.
2017-02-12 21:50:16 +01:00
Radosław Kujawa
0bd7b85dea
Implement simpler to use assembly mode, straight to bus.
...
While here refactor existing assembly functions.
2017-02-12 16:47:06 +01:00
Radosław Kujawa
630daee702
Premilinary support for decimal mode.
...
While here add SED emulation. Implement BCD support for ADC instruction.
2017-02-10 22:23:06 +01:00
Radosław Kujawa
4c7a15f524
Add emulation of WAI instruction.
2017-02-09 21:53:45 +01:00
Radosław Kujawa
5cca703020
Add RTI emulation and test case.
2017-02-08 15:55:39 +01:00
Radosław Kujawa
299b7ee7d8
Add functions to dump stack.
...
Always useful.
2017-02-06 23:16:00 +01:00
Radosław Kujawa
272c4d0b7b
BIT instruction does not affect overflow flag in immediate mode.
2017-02-04 22:07:56 +01:00
Radosław Kujawa
ac48e5435f
Add preliminary support for interrupts.
2017-02-04 21:44:13 +01:00
Radosław Kujawa
51b47d707b
Set reason for stopping the emulation when stepping.
2017-02-03 22:21:43 +01:00
Radosław Kujawa
a255b093e9
Fix overflow flag for SBC.
2017-02-02 22:54:34 +01:00
Radosław Kujawa
1f8db85688
Fix pointer precedence. Should resolve #1 .
2017-02-02 20:58:30 +01:00
Radosław Kujawa
7f7fdad8dc
Enable GDB-specific debug symbols.
2017-02-02 16:22:53 +01:00
Radosław Kujawa
77ce27e4fc
Try to support assembling multi byte instructions.
2017-02-02 15:41:29 +01:00
Radosław Kujawa
9eff6d535b
Add functions to assemble mnemonics into machine code (into buffer).
2017-02-02 14:45:06 +01:00
Radosław Kujawa
941036615e
Add some null pointer checking asserts.
2017-02-02 14:43:44 +01:00
Radosław Kujawa
6711a8fe11
Fix bus space array indexing. Makes bus loading from buffer work.
2017-02-02 14:43:02 +01:00
Radosław Kujawa
3075ed87fa
Add ability to load things onto bus from buffer.
2017-02-02 12:06:41 +01:00
Radosław Kujawa
eb7179f89a
Fix emulation function for nop.
...
Problem introduced by s/'ing mindlessly.
2017-02-02 11:51:32 +01:00
Radosław Kujawa
4e3721ef85
Mark invalid instructions as invalid, not as nops.
2017-02-02 11:23:30 +01:00
Radosław Kujawa
249509fad0
Clean up unused function.
2017-02-02 11:00:32 +01:00
Radosław Kujawa
8e732f3b94
Make SBC somewhat less broken.
2017-02-01 22:15:16 +01:00
Radosław Kujawa
436810b79f
The overflow flag should be represented by "V".
2017-02-01 22:11:24 +01:00
Radosław Kujawa
92418b0f1f
Add SBC emulation.
...
Of dubious quality.
2017-02-01 14:35:50 +01:00
Radosław Kujawa
371856f6c7
Make emul_bbr/bbs/smb/rmb functions static.
...
Since they are only called by wrappers within the same file.
2017-01-31 23:30:49 +01:00
Radosław Kujawa
faa824e306
Implement emulation of ADC, plug the overflow test.
...
While here fix numerous test cases, lol.
2017-01-31 23:08:23 +01:00
Radosław Kujawa
afadfd8b13
Fix pointer usage.
2017-01-31 14:11:21 +01:00
Radosław Kujawa
44f723b016
Attempt to emulate the BRK instruction.
2017-01-31 00:31:28 +01:00
Radosław Kujawa
b21d884f8b
Clear the decimal flag on initialisation.
2017-01-31 00:31:04 +01:00
Radosław Kujawa
bc137b9390
Add emulation of BBR0-7 and BBS0-7 instructions.
2017-01-30 21:25:45 +01:00
Radosław Kujawa
1c72bd23a8
More meaningful comments.
2017-01-30 21:24:45 +01:00
Radosław Kujawa
5554de9411
Add TSB and TRB emulation.
2017-01-29 22:54:06 +01:00
Radosław Kujawa
923a9db649
Add emulation of SMB0-SMB7 instructions.
2017-01-29 21:34:58 +01:00
Radosław Kujawa
3c5162b0b9
Add emulation of branch instructions.
2017-01-29 13:57:51 +01:00
Radosław Kujawa
79b5a01d10
Add forgotten prototype of program_counter_branch().
2017-01-29 13:57:20 +01:00
Radosław Kujawa
e0fa334e3e
Fix relative address pritning in disassembly.
2017-01-29 13:55:53 +01:00
Radosław Kujawa
f5a4f45127
Add function setting the PC for branches.
2017-01-29 13:29:17 +01:00
Radosław Kujawa
762f140efd
Better operand formatting in disassembly.
2017-01-29 13:08:32 +01:00
Radosław Kujawa
bb3f77ec7f
Add JSR and RTS emulation and tests.
2017-01-29 11:47:34 +01:00
Radosław Kujawa
4a8fbfbaeb
Add CPX and CPY emulation and test cases.
2017-01-28 14:04:20 +01:00
Radosław Kujawa
3640a162a3
Add CMP emulation and test cases.
2017-01-28 13:26:51 +01:00
Radosław Kujawa
f3205e7272
Add CLI and SEI emulation and test case.
2017-01-28 11:19:34 +01:00
Radosław Kujawa
ee66f9c78c
Add emulation and test for CLV instruction.
2017-01-28 11:12:25 +01:00
Radosław Kujawa
735c3677ce
Correct address calculation for absolute indirect and absolute indirect X modes.
2017-01-28 00:10:22 +01:00
Radosław Kujawa
8d2d694158
Implement (partial) JMP emulation and basic test for it.
2017-01-27 22:28:33 +01:00
Radosław Kujawa
05cedfb1f5
Also print program counter when dumping regs.
2017-01-27 22:28:09 +01:00
Radosław Kujawa
9da9f61f5a
There's one more field in that generated header. Adjust.
2017-01-27 22:27:30 +01:00
Radosław Kujawa
2430cfd722
Branch and jump instrucitons need special PC treatment.
2017-01-27 20:43:08 +01:00
Radosław Kujawa
9294891a23
Remove unused variable.
2017-01-27 20:43:02 +01:00
Radosław Kujawa
28a5d54510
Add ASL and LSR emulation.
2017-01-27 17:14:56 +01:00
Radosław Kujawa
f63c00b192
Add RMB emulation.
2017-01-27 13:18:02 +01:00
Radosław Kujawa
1f581d3fd3
Add function to dump registers state onto stdout.
2017-01-27 11:27:14 +01:00
Radosław Kujawa
646c7d1905
Some opcodes also write data to accumulator.
2017-01-27 11:03:50 +01:00
Radosław Kujawa
8d5482ad09
Remove x bit from the awk program, it is never started directly.
2017-01-27 10:14:32 +01:00
Radosław Kujawa
0c63342ad7
Add comments explaing what these functions do.
2017-01-27 10:13:32 +01:00
Radosław Kujawa
b7f1b8095b
Add emulation of INC and DEC.
2017-01-27 00:04:47 +01:00
Radosław Kujawa
1da576c821
Merge branch 'master' of github.com:rkujawa/rk65c02
2017-01-26 17:27:22 +01:00
Radosław Kujawa
80b6848108
Preliminary support for stepping.
2017-01-26 13:11:00 +01:00
Radosław Kujawa
941e89173a
Add struct with info about reason for stopping emulation.
2017-01-26 12:52:40 +01:00
Radosław Kujawa
285d2ee828
Initial state of the CPU has IRQ disable bit set.
2017-01-25 21:17:18 +01:00
Radosław Kujawa
13ef3e2d08
Add PHX, PLX, PHY, PLY emulation and test cases.
2017-01-25 13:14:00 +01:00
Radosław Kujawa
acc0fad32e
Add emulation of BIT instruction and test cases for it.
2017-01-25 10:10:00 +01:00
Radosław Kujawa
7915657355
Add bit testing macro.
2017-01-25 10:09:50 +01:00
Radosław Kujawa
95db0b7dd2
Add commented out debug message.
2017-01-25 10:09:38 +01:00
Radosław Kujawa
47028b0e26
Add commented out debug message.
2017-01-24 22:18:21 +01:00
Radosław Kujawa
90b6c06e32
Fix missing breaks in indirect zero page handling switch.
2017-01-24 22:18:02 +01:00
Radosław Kujawa
39aaca5034
Correct indirect zero page Y behaviour.
2017-01-24 16:37:10 +01:00
Radosław Kujawa
20a39a8d6c
Correct wrong ORA indirect zero page X size.
2017-01-24 16:36:39 +01:00
Radosław Kujawa
342a188314
Fix wrong mnemonic for absolute ORA.
2017-01-23 15:39:10 +01:00
Radosław Kujawa
6c3a203cdc
Support all AND addressing modes.
2017-01-23 15:28:14 +01:00
Radosław Kujawa
0dd63f2bf0
Add ROL and ROR emulation. Too old to ror and to rol!
2017-01-23 15:25:32 +01:00
Radosław Kujawa
f9708ca049
Add STA, STY, STX emulation.
2017-01-23 15:02:21 +01:00
Radosław Kujawa
ee8a16a5ba
Add ORA and EOR emulation.
2017-01-23 14:53:05 +01:00
Radosław Kujawa
6b7298cf8d
Avoid intermediate variable in AND emulation.
2017-01-23 14:45:46 +01:00
