Adrian Conlon
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45dc274167
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Get rid of wrappers for bus access: i.e. make it clearer where the bus is being read/written.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-03-10 01:53:57 +00:00 |
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Adrian Conlon
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c6eb68ba13
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Further return by value, rather than reference.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-02-26 19:47:35 +00:00 |
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Adrian Conlon
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adf506a41e
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Optimisation: Prefer return by value to return by reference. ~10% speed-up!
Just watch a video by Chandler Carruth from 2015, where he talked about C++ optimisers...
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-02-25 19:48:01 +00:00 |
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Adrian Conlon
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d34b161255
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Simplify some build options.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-02-19 23:18:21 +00:00 |
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Adrian Conlon
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1bf2a9bdfb
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6502, Disassembly: Some dump methods can be static
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-27 10:13:17 +00:00 |
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Adrian Conlon
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9124f10008
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6502: Implement some more undocumented instructions (for the Blargg nes cpu tests)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-21 10:45:25 +00:00 |
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Adrian Conlon
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b5fee5b5d9
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Make explicit the notion of page based loads in M6502.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-18 21:17:45 +00:00 |
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Adrian Conlon
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21bd8a06e6
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Power on conditions are chip specific and *not* directly related to construction/destruction.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-18 17:50:15 +00:00 |
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Adrian Conlon
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19aea5244b
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The vector of instructions was good, but a switch is fastest and probably easiest to read/modify. (Running at 101Mz, 32M instructions per second)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-17 22:17:08 +00:00 |
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Adrian Conlon
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d57cb8c9be
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6502: I might regret this, but move to a vector of instructions, rather than decoding them one at a time
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-16 23:54:43 +00:00 |
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Adrian Conlon
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43573ac699
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6502: Rotate and shift by value, not reference.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-14 21:03:29 +00:00 |
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Adrian Conlon
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4bd1a1eab1
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M6502: Couple of small C++ usage changes: shouldn't be any functional effects.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-12 23:32:06 +00:00 |
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Adrian Conlon
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177dbbcd33
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Tidy 6502 PLP implementation a little.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-12 20:39:15 +00:00 |
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Adrian Conlon
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ac95670cfc
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Add support for 6502 pin 38 (SO: set overflow)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-12 20:13:35 +00:00 |
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Adrian Conlon
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0a2873c40d
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Add AllSuiteA test suite (works fine)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-09 20:18:03 +00:00 |
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Adrian Conlon
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ffb945a46d
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Add some documentation (!) for undocumented 6502 instructions.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-07 23:48:27 +00:00 |
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Adrian Conlon
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847e07be86
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Add undocumented 6502 instruction RRA. nestest.nes now runs to completion: Hurrah!
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-07 23:42:26 +00:00 |
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Adrian Conlon
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4d9c0b490a
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Add undocumented 6502 instruction: SRE
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-07 23:16:24 +00:00 |
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Adrian Conlon
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65b856611e
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Undocumented 6502 instruction RLA added.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-07 22:50:14 +00:00 |
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Adrian Conlon
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31524929c3
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Correct Windows path style to platform neutral.
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2018-01-06 23:26:34 +00:00 |
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Adrian Conlon
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5b62a6b70b
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Sort out M6502 precompiled headers.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-06 23:19:29 +00:00 |
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Adrian Conlon
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47919fe5af
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6502 linux compatibility in Makefile
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-06 23:19:07 +00:00 |
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Adrian Conlon
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809973acb3
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Couple more linux changes for the 6502...
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-06 22:35:17 +00:00 |
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Adrian Conlon
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08d742e336
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Linux compatibility changes.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-06 22:18:02 +00:00 |
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Adrian Conlon
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2482a7b742
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Moved the 6502 test directory to something a little more standard.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-06 22:10:02 +00:00 |
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Adrian Conlon
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2311ea98c6
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Add preliminary Linux support for 6502 builds.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-06 21:37:03 +00:00 |
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Adrian Conlon
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0d3fee5daf
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Strictly not required, but makes life easier: add the 6502 test binary.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-06 21:31:25 +00:00 |
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Adrian Conlon
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28f11b15bb
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Whoops: forgot that load data direct needs to be disabled when loading from binary.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-05 20:52:36 +00:00 |
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Adrian Conlon
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6ddb57fadb
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Updated to latest version of the Klaus Dormann 6502 tests.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-05 19:42:34 +00:00 |
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Adrian Conlon
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5c3568aebd
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Undocumented instruction: SLO added
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-04 22:46:44 +00:00 |
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Adrian Conlon
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cb89eb8c82
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Add undocumented 6502 instruction: ISB
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-04 21:47:50 +00:00 |
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Adrian Conlon
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12565966de
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Remove some assertions from the 6502 implementation.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-02 23:24:52 +00:00 |
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Adrian Conlon
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4d5afb67a3
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Refactor the 6502 code a little. No functional changes and tests still seem to work.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-02 21:20:47 +00:00 |
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Adrian Conlon
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345ab2e2c6
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Undocumented instruction: DCP added
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-01 21:05:42 +00:00 |
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Adrian Conlon
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5f54f61514
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Undocumented variant of SBC added.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-01 12:55:47 +00:00 |
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Adrian Conlon
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1beee9782f
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Undocumented instruction: SAX added
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-01 12:46:21 +00:00 |
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Adrian Conlon
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75aece30e3
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Undocumented instruction: LAX added.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-01 12:28:00 +00:00 |
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Adrian Conlon
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d4c08b2a25
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Use portability macros in the 6502 disassembler.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2018-01-01 01:16:22 +00:00 |
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Adrian Conlon
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eb40c0865e
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Started added undocumented instructions: first the NOPS (single, double and triple byte variants, including cycle variations).
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-31 14:41:00 +00:00 |
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Adrian Conlon
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82fe35891d
|
Linux compatibility changes
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-30 15:22:27 +00:00 |
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Adrian Conlon
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2683999e2c
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Mild refactoring, no functional change...
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-30 14:33:48 +00:00 |
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Adrian Conlon
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8e4030a5aa
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Add some performance hints to conditionals.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-29 14:56:26 +00:00 |
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Adrian Conlon
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412a44fafd
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Correct some page crossing conditions affecting 6502 cycle counts.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-29 14:49:53 +00:00 |
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Adrian Conlon
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0604d5cf22
|
Actually, all 6502 getWord usage has an invariant high page indicator.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-29 11:50:24 +00:00 |
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Adrian Conlon
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7432e602f8
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Correct a 6502 bug in absolute indirect addressing mode (unchanging page on address resolution).
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-28 16:15:22 +00:00 |
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Adrian Conlon
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1946b7ef39
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Correct a couple of flag anomalies in the 6502 processor highlighted by NESTEST
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-28 15:53:30 +00:00 |
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Adrian Conlon
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dcf99bf65d
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Zero page indirection should completely ignore the high byte of the address line.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-28 15:16:21 +00:00 |
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Adrian Conlon
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bfa1c07ea4
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Change a couple of small formatting quirks in the disassembler to better match "nestest".
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-28 14:18:17 +00:00 |
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Adrian Conlon
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81ed53ce11
|
First stab at a Ricoh 2A03: A 6502 minus decimal mode support.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-25 23:34:56 +00:00 |
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Adrian Conlon
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1edabd79f3
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More pinout oriented method of executing instructions (especially interrupts)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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2017-12-10 21:41:48 +00:00 |
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