Adrian Conlon
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25321e78e7
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Now that HALT/RESET/NMI/IRQ and BRK have a unified architecture, I think this wraps up the instruction handler of the 6502.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-08 01:32:43 +00:00 |
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Adrian Conlon
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3faec680b0
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I think this fixes one of my NES issues. The fix-up required for the PC is handled by the fetchByte associated with the BRK instruction.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-07 01:28:23 +00:00 |
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Adrian Conlon
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741e005e0c
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Add some more 6809 documentation.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-07 01:09:24 +00:00 |
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Adrian Conlon
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d7763d8215
|
Profile mode no longer exists on the 6502 test program.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-07 01:08:23 +00:00 |
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Adrian Conlon
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06e2a5c947
|
Start unifying 6502 interrupt handling. NMI/IRQ/BRK are all doing mostly the same work.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-07 01:06:07 +00:00 |
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Adrian Conlon
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b7b7c93a77
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This tidies the last of 6502 cycle accurate instruction implementations.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 22:34:53 +00:00 |
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Adrian Conlon
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ad644f7013
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Tidy the 6502 instruction switch statement a little to lessen the width a little.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 20:51:13 +00:00 |
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Adrian Conlon
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c3d2ef51d9
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Cycle accuracy for a couple of the indexed write (store) instructions.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 20:39:37 +00:00 |
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Adrian Conlon
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4d3be9e756
|
Use correct boundary crossing conditional for Read/Modify/Write Absolute,X addressing mode.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 12:58:13 +00:00 |
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Adrian Conlon
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baf32cef89
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Get the memory access more correct for more of boundary crossing indexed addressing modes.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 12:17:43 +00:00 |
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Adrian Conlon
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a13ad5042a
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Correct constructions of register16_t: the structure is "#ifdef"ed for different endian arrangements.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 11:27:43 +00:00 |
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Adrian Conlon
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3749585398
|
Cycle accuracy changes for BRK/RTI instructions.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 11:13:49 +00:00 |
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Adrian Conlon
|
5b9c348ff1
|
Remove nodiscard instance where we're using the method for cycle/memory accuracy.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-06 11:10:05 +00:00 |
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Adrian Conlon
|
3337f57747
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More cycle accuracy changes, concentrating on stack operations.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-05 23:21:43 +00:00 |
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Adrian Conlon
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f5125b2a35
|
Add some documentation regarding instruction cycle timings.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-05 23:21:12 +00:00 |
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Adrian Conlon
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143e9a9e68
|
More cycle accuracy changes:
1) implied instruction, pointless fetch
2) branch pointless fetch when condition is met
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-05 17:23:50 +00:00 |
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Adrian Conlon
|
3b7cec9c69
|
Spot a couple more addCycle patterns.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2019-01-04 09:17:59 +00:00 |
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Adrian Conlon
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d2e853f101
|
Explicitly note implied addressing mode instructions.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2019-01-04 08:20:23 +00:00 |
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Adrian Conlon
|
556e06426e
|
Further work on the slow migration to a cycle accurate 6502
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2019-01-03 01:04:12 +00:00 |
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Adrian Conlon
|
6c582f6349
|
Add a working(ish) 6502 ATX implementation.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-30 17:12:45 +00:00 |
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Adrian Conlon
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5ade05a689
|
Add a bunch of undocumented 6502 instructions. Abandoned ATX implementation. Too poorly documented.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-30 12:01:23 +00:00 |
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Adrian Conlon
|
815c99710a
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Add enough undocumented 6502 instructions to get through "nestest".
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-29 22:22:31 +00:00 |
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Adrian Conlon
|
c136b306ab
|
Use the new busRead/Write processor methods to simplify the 6502 cycle counting.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-29 22:18:01 +00:00 |
|
Adrian Conlon
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adb60a6e90
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Port the 6502 to the new bus architecture.
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2018-12-29 19:40:02 +00:00 |
|
Adrian Conlon
|
f38d326ca7
|
Improve the flexibility of the BUS mapping/read/write architecture.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-29 19:17:36 +00:00 |
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Adrian Conlon
|
722888ae66
|
Correct ROM loading issue discovered while resurrecting NES support.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-29 19:06:24 +00:00 |
|
Adrian Conlon
|
2a223a5acd
|
More M6532 documentation added/adjusted
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-03 23:39:22 +00:00 |
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Adrian Conlon
|
fe1aaf56c7
|
Add work in progress of M6532 Riot chip. Nowhere near working yet, but includes lots of documentation.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-03 22:54:57 +00:00 |
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Adrian Conlon
|
d6ebf00ccc
|
Merge branch 'master' of https://github.com/MoleskiCoder/EightBit
|
2018-12-01 16:46:06 +00:00 |
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Adrian Conlon
|
679275e930
|
Correct Linux build errors.
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
|
2018-12-01 16:41:39 +00:00 |
|
Adrian Conlon
|
dc477cd050
|
Use explicit enumeration types (improves type safety) where appropriate.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-01 15:24:29 +00:00 |
|
Adrian Conlon
|
cf0828c595
|
Tidy the Z80 BIT implementation for better code resuse. No functional change
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-12-01 13:01:33 +00:00 |
|
Adrian Conlon
|
802ad6041d
|
Update project README.md
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-29 01:37:53 +00:00 |
|
Adrian Conlon
|
e80a5bfcd4
|
Whoops: the bit instruction *can* have its return value discarded...
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-29 00:14:44 +00:00 |
|
Adrian Conlon
|
9960ad6012
|
Tidy return parameter usage a little within the EightBit library.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-29 00:09:40 +00:00 |
|
Adrian Conlon
|
deb9a6d43c
|
Correct more analysis problems. No functional changes.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-28 21:27:14 +00:00 |
|
Adrian Conlon
|
a940a29283
|
Unify build settings across all the EightBit libraries.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-28 21:24:51 +00:00 |
|
Adrian Conlon
|
a673a64c3f
|
Lots of various changes suggested by the code analysis tools.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-27 22:36:54 +00:00 |
|
Adrian Conlon
|
555423d10a
|
Tidy the Z80 test classes, based on code analysis.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-27 22:28:09 +00:00 |
|
Adrian Conlon
|
0313037d6f
|
Tidy the 8080 test configuration class a little.
|
2018-11-27 22:19:15 +00:00 |
|
Adrian Conlon
|
9dcaaadf80
|
Simplify a couple of the MC6809 test projects.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-25 19:05:14 +00:00 |
|
Adrian Conlon
|
e156b1ff1a
|
Correct some more compilation warnings (across the whole EightBit project).
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-25 19:02:11 +00:00 |
|
Adrian Conlon
|
21a16a3c97
|
Ensure newly added C++ implementations are in the VisualStudio project files.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-25 11:05:41 +00:00 |
|
Adrian Conlon
|
64ed8e01ec
|
Add some more MC6809 documentation (and Searle BASIC derivative).
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-25 10:45:06 +00:00 |
|
Adrian Conlon
|
887b89308a
|
Ensure virtual methods are no longer defined inline.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-25 10:43:51 +00:00 |
|
Adrian Conlon
|
85bc2aab12
|
Reverse "UNLIKELY" conditions that also contain an else. Helps compilers that have no LIKELY/UNLIKELY macros.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-25 10:38:30 +00:00 |
|
Adrian Conlon
|
000b254d2a
|
Tidy some white space issues a little.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-24 10:56:36 +00:00 |
|
Adrian Conlon
|
5ff883305e
|
Modernise the signal handling and construction sequence of the Z80 test board.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-24 10:56:00 +00:00 |
|
Adrian Conlon
|
cec760767a
|
Fix some problems in the MC6809 instruction decoder.
Found by going through the switch line by line...
BASIC interpreter now seems to run!
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
|
2018-11-20 08:51:17 +00:00 |
|
Adrian Conlon
|
c54c2a681b
|
Merge branch 'master' of https://github.com/MoleskiCoder/EightBit
|
2018-11-18 22:16:16 +00:00 |
|