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Author SHA1 Message Date
Adrian.Conlon
e42484d35c Better DIV implementation. Incremented as a word and exposed as the high part in the DIV register. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-09-01 13:17:20 +01:00
Adrian.Conlon
a2784ae02d Timers can (of course) expire during CPU instruction execution. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-31 17:21:44 +01:00
Adrian.Conlon
406e651c66 Whoops: The processor should only execute instructions while it is powered. Otherwise, it'll get into an infinite loop. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-31 17:19:32 +01:00
Adrian.Conlon
711d4f4384 Add some GB IO register information in the disassembler. Nothing fancy! 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-31 17:18:38 +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
20c126adfc Correct a couple of cycle counting issues. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-31 01:19:51 +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
5fe3d458df Correct F8 carry flag usage. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-29 22:36:26 +01:00
Adrian.Conlon
daab0484c3 Use corrected LR35902 library to run test loop. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-29 22:35:56 +01:00
Adrian.Conlon
ea033d3984 Move a fair amount of code from the GameBoy implementation into the EightBit library for the LR35902 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-29 22:23:32 +01:00
Adrian.Conlon
9da58a5af7 Merge branch 'master' of https://github.com/MoleskiCoder/EightBit 2017-08-29 17:28:24 +01:00
Adrian.Conlon
8033948aef Very small argument tidy. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-29 17:26:41 +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
91c8855183 Share i8080 and Z80 I/O implementations. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-28 21:41:10 +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
73a34f4fae Start a more careful documentation of the I/O registers. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-26 09:46:53 +01:00
Adrian.Conlon
4cbab14750 Remove unused StatusFlags.h header. Not sure why that was still there! 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-25 22:37:10 +01:00
Adrian.Conlon
c6df5ba775 Merge branch 'master' of https://github.com/MoleskiCoder/EightBit 2017-08-25 10:33:31 +01:00
Adrian.Conlon
246e6431ab Small correction to GB SP instructions passes a little more of the Blargg tests. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-25 10:33:22 +01:00
Adrian.Conlon
01317796c0 Effective address calculation isn't required for Gameboy MBC1 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-24 23:47:28 +01:00
Adrian.Conlon
ae4106ce5a Preliminary MBC1 support. Enough to run cpu_instrs.gb to completion. Hurrah! 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-24 23:23:40 +01:00
Adrian.Conlon
9964070b85 Refactor to allow peek/poke/reference to share a common implementation as much as possible. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-24 11:28:01 +01:00
Adrian.Conlon
19c0b93262 Changes to the "const"ness of peek necessitate some changes. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-24 11:06:23 +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
da96454185 Merge branch 'master' of https://github.com/MoleskiCoder/EightBit 2017-08-23 23:18:52 +01:00
Adrian.Conlon
2c7e32aa78 First stab at implementing MBC1 support for LR35902. Not complete, but all old tests still work. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-23 23:17:45 +01:00
Adrian.Conlon
12c9125e9b Correct warning in 6502 implementation. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-23 22:30:58 +01:00
Adrian.Conlon
2c99e09618 Correct compiler type for LR35902 fuse tests. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-23 22:22:58 +01:00
Adrian.Conlon
a087750d9c Interrupt handling doesn't use the current running cycles. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-21 09:34:17 +01:00
Adrian.Conlon
1cf73a8aa4 Correct test runner, to ensure LR35902 tests work correctly. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-20 23:01:49 +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
57e48e389f First stage "halt" reimplementation: allow the clock to run during halt, but nothing else. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-20 19:44:57 +01:00
Adrian.Conlon
42b0fdc23d Implement DIV timer (TBC) 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-20 09:52:26 +01:00
Adrian.Conlon
75b17e47a8 Better method of enabling/disabling boot ROM. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-19 17:33:28 +01:00
Adrian.Conlon
86a4e22ae1 First stab at implementing GB timer control. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-18 19:00:10 +01:00
Adrian.Conlon
0457dffba4 Rewrite GB interrupt handling to properly document the trigger sequence. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-18 09:49:06 +01:00
Adrian.Conlon
039545bd08 Rearrange some of the shift/rotate code a little to make it easier to read. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-16 22:51:15 +01:00
Adrian.Conlon
54ab96ea38 Correct expected test results, now we know the zero flag is cleared for shift/rotate operations. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-15 23:35:27 +01:00
Adrian.Conlon
87e97eea8c Fixes rotates and shifts zero flag use (i.e. 09 - op r,r,s now runs successfully) 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-15 23:27:46 +01:00
Adrian.Conlon
2bbb021176 Correct case error in LR35902 disassembler 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-14 22:57:46 +01:00
Adrian.Conlon
6506b33436 Add comment noting GB: unique instruction. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-14 18:41:51 +01:00
Adrian.Conlon
c7dafb5f75 Another GB test corrected. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-14 18:11:19 +01:00
Adrian.Conlon
00f6c14703 Another couple of tests fixed. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-14 10:54:44 +01:00
Adrian.Conlon
a8c3c46709 Fix broken GB pop af test, to take low order flags mask. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-14 10:42:34 +01:00
Adrian.Conlon
043b7f3338 Another tested GB instruction. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-14 10:36:19 +01:00
Adrian.Conlon
e7116c5b56 Another GB test fixed. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-14 10:22:22 +01:00
Adrian.Conlon
4d322aeeb3 More GB tests fixed 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-13 23:01:52 +01:00
Adrian.Conlon
4a0d2dd930 Miscellaneous GB tests fixed. No surprises. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-13 22:51:15 +01:00