Commit Graph

70 Commits

Author SHA1 Message Date
Adrian Conlon
b0aacce406 Tidy header file usage a little.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-08-18 23:56:16 +01:00
Adrian Conlon
cc64e114a9 Start refactoring the processor classes to allow big/little endian processors to be specified.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-08-17 21:53:49 +01:00
Adrian Conlon
70c70af969 Sort out some exception and member initialisation rules.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-08-11 21:19:19 +01:00
Adrian Conlon
cac871cf2b Remove duplicated code (from const definitions) the performance benefit isn't worth the amount of duplicated code.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-06-24 20:58:20 +01:00
Adrian Conlon
d27b490d4c (Hopefully) fix compilation issue on g++
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-06-16 09:53:44 +01:00
Adrian Conlon
67487b5b6e Simplify the usage of the register16_t union.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-06-16 00:55:32 +01:00
Adrian Conlon
3e854c7c49 Const some more bus/processor usage, and ensure the data bus is a member, not a reference to memory.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-06-10 00:40:56 +01:00
Adrian Conlon
d818095815 MEMPTR is really only a concept of Intel style processors.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-03-18 22:40:23 +00:00
Adrian Conlon
45dc274167 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>
2018-03-10 01:53:57 +00:00
Adrian Conlon
c6eb68ba13 Further return by value, rather than reference.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-02-26 19:47:35 +00:00
Adrian Conlon
adf506a41e 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>
2018-02-25 19:48:01 +00:00
Adrian Conlon
1bf2a9bdfb 6502, Disassembly: Some dump methods can be static
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-27 10:13:17 +00:00
Adrian Conlon
9124f10008 6502: Implement some more undocumented instructions (for the Blargg nes cpu tests)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-21 10:45:25 +00:00
Adrian Conlon
b5fee5b5d9 Make explicit the notion of page based loads in M6502.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-18 21:17:45 +00:00
Adrian Conlon
21bd8a06e6 Power on conditions are chip specific and *not* directly related to construction/destruction.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-18 17:50:15 +00:00
Adrian Conlon
19aea5244b 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>
2018-01-17 22:17:08 +00:00
Adrian Conlon
d57cb8c9be 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>
2018-01-16 23:54:43 +00:00
Adrian Conlon
43573ac699 6502: Rotate and shift by value, not reference.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-14 21:03:29 +00:00
Adrian Conlon
ac95670cfc Add support for 6502 pin 38 (SO: set overflow)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-12 20:13:35 +00:00
Adrian Conlon
847e07be86 Add undocumented 6502 instruction RRA. nestest.nes now runs to completion: Hurrah!
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-07 23:42:26 +00:00
Adrian Conlon
4d9c0b490a Add undocumented 6502 instruction: SRE
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-07 23:16:24 +00:00
Adrian Conlon
65b856611e Undocumented 6502 instruction RLA added.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-07 22:50:14 +00:00
Adrian Conlon
5b62a6b70b Sort out M6502 precompiled headers.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-06 23:19:29 +00:00
Adrian Conlon
5c3568aebd Undocumented instruction: SLO added
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-04 22:46:44 +00:00
Adrian Conlon
cb89eb8c82 Add undocumented 6502 instruction: ISB
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-04 21:47:50 +00:00
Adrian Conlon
12565966de Remove some assertions from the 6502 implementation.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-02 23:24:52 +00:00
Adrian Conlon
4d5afb67a3 Refactor the 6502 code a little. No functional changes and tests still seem to work.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-02 21:20:47 +00:00
Adrian Conlon
345ab2e2c6 Undocumented instruction: DCP added
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-01 21:05:42 +00:00
Adrian Conlon
1beee9782f Undocumented instruction: SAX added
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-01 12:46:21 +00:00
Adrian Conlon
75aece30e3 Undocumented instruction: LAX added.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-01 12:28:00 +00:00
Adrian Conlon
d4c08b2a25 Use portability macros in the 6502 disassembler.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-01-01 01:16:22 +00:00
Adrian Conlon
82fe35891d Linux compatibility changes
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-30 15:22:27 +00:00
Adrian Conlon
2683999e2c Mild refactoring, no functional change...
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-30 14:33:48 +00:00
Adrian Conlon
8e4030a5aa Add some performance hints to conditionals.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-29 14:56:26 +00:00
Adrian Conlon
412a44fafd Correct some page crossing conditions affecting 6502 cycle counts.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-29 14:49:53 +00:00
Adrian Conlon
0604d5cf22 Actually, all 6502 getWord usage has an invariant high page indicator.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-29 11:50:24 +00:00
Adrian Conlon
7432e602f8 Correct a 6502 bug in absolute indirect addressing mode (unchanging page on address resolution).
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-28 16:15:22 +00:00
Adrian Conlon
dcf99bf65d Zero page indirection should completely ignore the high byte of the address line.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-28 15:16:21 +00:00
Adrian Conlon
bfa1c07ea4 Change a couple of small formatting quirks in the disassembler to better match "nestest".
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-28 14:18:17 +00:00
Adrian Conlon
81ed53ce11 First stab at a Ricoh 2A03: A 6502 minus decimal mode support.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-25 23:34:56 +00:00
Adrian Conlon
1edabd79f3 More pinout oriented method of executing instructions (especially interrupts)
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-12-10 21:41:48 +00:00
Adrian Conlon
0b6ef3d4dd VS2017 and CPP core guidelines updates
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-11-11 15:13:26 +00:00
Adrian Conlon
c292fb552e A whole bunch of consistency changes. No functional changes.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-11-03 22:05:01 +00:00
Adrian Conlon
0d3776d3ec Get the 6502 tests running again.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2017-10-28 13:06:56 +01:00
Adrian.Conlon
c472d70c5c Ensure the MOS6502 unit tests run successfully to completion.
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
2017-09-07 00:58:56 +01:00
Adrian.Conlon
9b43b74c28 Rationalise some of the reset/initialise logic across pProcessor implementations.
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
2017-09-01 16:01:40 +01:00
Adrian.Conlon
e70686c5de Some more rationalisation of processor execution/stepping strategies.
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
2017-08-30 23:17:34 +01:00
Adrian.Conlon
d710a28526 More consolidation of instruction implementations.
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
2017-08-28 21:18:08 +01:00
Adrian.Conlon
329fd269ed Share some more code from the 6502 processor implementation.
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
2017-08-28 18:52:48 +01:00
Adrian.Conlon
59e9adf57c Share more of push/pop implementation across processors.
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
2017-08-28 13:19:17 +01:00