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53 Commits

Author SHA1 Message Date
Adrian Conlon
dfc4c49454 Correct 5-bit sign extension on the 6809 processor. Allows CLR 5-bit offset indexed disassembly to work correctly. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 12:57:44 +01:00
Adrian Conlon
a8cc289149 Whoops: The "Bus" class *really* isn't allowed to know the "endianness" of the attached processor! 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 11:27:33 +01:00
Adrian Conlon
c105ee37bf Have a stab at sorting out processor pin handling. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 12:09:26 +01:00
Adrian Conlon
6d4223c368 Start moving towards reset being just another style of interrupt. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 01:34:30 +01:00
Adrian Conlon
2a3b0a5291 Add JMP and JSR instructions to the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 18:10:38 +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
ed76038bfa More memptr adjustments 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-17 13:59:59 +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
e40240694f More removal of duplicated code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-24 22:33:02 +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
116f9961c4 Add a higher/lower nibble mask 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-05-25 22:36:10 +01:00
Adrian Conlon
9de0f597f6 Remove some "tricksy" code from the Z80 emulator chain. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-04-14 09:39:06 +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
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
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
108f66632e Performance: watch out for unnecessary virtualised methods. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-01-06 17:13:02 +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
7e3957d4db Rewrite i8080 interrupts to be more closely related to the hardware. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-02 23:50:59 +00:00
Adrian Conlon
d70f6b375b Ensure each header file has a newline on its own at the end of each file. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-30 23:19:17 +00:00
Adrian Conlon
12385dcc6f More clang warnings corrected. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-30 23:15:40 +00:00
Adrian Conlon
a0f7d584b6 Correct a few warnings reported by "clang" 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-30 14:37:18 +00:00
Adrian Conlon
c513f0cab1 GSL was too problematic when used with GCC. Removed. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-20 19:17:49 +00:00
Adrian Conlon
67c27d4a3e GSL + CPP core guidelines changes. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-18 14:29:30 +00:00
Adrian Conlon
47446a617d the "run" method is probably better off not being overridden. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-11 15:50:55 +00:00
Adrian Conlon
d010e3ca2f Start incorporating CPP core guidelines (as an experiment!) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-10 22:41:50 +00:00
Adrian Conlon
8143f8a506 Try to correct "one definition rule" problems: 
1) No forward declarations
2) No virtual methods defined inline.

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-05 12:47:42 +00:00
Adrian Conlon
926ac48224 Move to VS2017 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-04 23:15:55 +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
64b7335a79 Attempted move to a "BUS" oriented memory architecture (TBC!) 
Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
 2017-09-06 13:22:23 +01:00
Adrian.Conlon
da806bddcb Tidy some more Windows/Linux compatibility issues. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-09-03 21:30:46 +01:00
Adrian.Conlon
640b2be670 Parts of the EightBit library become linux compatible (TBC!) 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-09-03 12:11:14 +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
1eb127ed72 Add power support to processor base class. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-31 12:13:00 +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
ec15a2c90c Correct SP arithmetic methods: All Blargg CPU tests now pass. Hurrah! 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-28 23:04:25 +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
Adrian.Conlon
448ee2f09f Refactor the MBC implementation to allow a single point of definition. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-24 10:28:31 +01:00
Adrian.Conlon
8716035396 Second stage halt implementation: allow halt state to be exited by an interrupt. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-20 20:09:21 +01:00
Adrian.Conlon
016b3bca59 Switch to a memory read/write event driven model. All tests passing. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-06 17:06:48 +01:00
Adrian.Conlon
b6dd48ca63 Some more small clarifications of shared processor implementation. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-25 18:56:43 +01:00
Adrian.Conlon
4f491f110e Make the 6502 a little more compatible with other processor implementations. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-17 13:46:06 +01:00
Adrian.Conlon
8c81a27224 "Modernise" the 6502 emulator a little. Not complete, but does successfully complete Klaus Dormann tests. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-11 21:34:01 +01:00
Adrian.Conlon
3c0a1697fd Fetching bytes/words and stack access are more processor specific than I thought. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-07 09:27:06 +01:00
Adrian.Conlon
c9bf24d1fa Tidy up register and static method access. 
Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
 2017-06-19 13:53:00 +01:00
Adrian.Conlon
627e41bf35 Introduce an IntelProcessor base class to allow known good implementation to be shared. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-06-11 09:45:34 +01:00
Adrian.Conlon
b1aa523dcc Small simplifications to base Processor class. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-06-10 12:42:55 +01:00