6502/EightBit
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624 Commits 1 Branch 0 Tags 113 MiB
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Commit Graph

144 Commits

Author SHA1 Message Date
Adrian Conlon
1eb59279a8 Remove unneeded powerOn override from the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 10:54:16 +01:00
Adrian Conlon
57928602d5 Tidy instruction prefixing in the 6809, such that executed/ing instruction events fire correctly. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 10:49:13 +01:00
Adrian Conlon
a43b1109bc Add TST instruction to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 00:33:18 +01:00
Adrian Conlon
c7ca555995 Add various SUB/SBC instructions to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 00:14:44 +01:00
Adrian Conlon
595a9a0af7 Tidy the formatting within the 6809 processor code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-23 23:22:14 +01:00
Adrian Conlon
722e7b89c2 Add implementation of ST instruction for the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-23 23:09:19 +01:00
Adrian Conlon
1e32514e1d Implement SEX/SWI/SWI2/SWI3/SYNC/TFR instructions for the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-23 14:09:46 +01:00
Adrian Conlon
e555fe335f Whoops: correct return values of 6809 branch helpers. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-23 09:32:37 +01:00
Adrian Conlon
6af8641b45 Tidy instruction comments a little on the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-23 09:22:17 +01:00
Adrian Conlon
224c254223 Add stubs for any remaining instruction sin the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-23 00:43:56 +01:00
Adrian Conlon
4703b89a42 First stab at 6809 branching 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 23:06:36 +01:00
Adrian Conlon
90fb124bd7 Whoops: RTI is 3B in the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 10:24:12 +01:00
Adrian Conlon
10684a02f4 Add RTI/RTS instructions to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 10:21:22 +01:00
Adrian Conlon
07248972bf Add implementations of ROL/ROR for the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 09:11:02 +01:00
Adrian Conlon
6f6e88f003 Tidy up instruction timing for the PUL/PSH instructions on the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 08:45:38 +01:00
Adrian Conlon
117f03cbd1 Whoops: Correct PULS/PSHU/PULU instructions on the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 08:19:44 +01:00
Adrian Conlon
1556e82313 Whoops: CWAI has to flag that the entire range of registers has been saved. (6809) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 01:03:54 +01:00
Adrian Conlon
86c9ade43f Add PSH/PUL instructions to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-22 00:34:16 +01:00
Adrian Conlon
905e7d3d44 Whoops: Correct cycle counts for the OR instruction on the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 23:09:04 +01:00
Adrian Conlon
551c26bb3c Add OR instruction to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 23:07:22 +01:00
Adrian Conlon
06f4300c38 Added MUL instruction to the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 22:45:33 +01:00
Adrian Conlon
c571956377 Add LSR implementation to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 21:59:25 +01:00
Adrian Conlon
05ca4166c7 Add LEA instruction to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 20:50:43 +01:00
Adrian Conlon
a917fb0d4c Add LD instructions to the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 18:57:20 +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
d44718ed22 Add INC instruction to the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 17:01:20 +01:00
Adrian Conlon
8c8c02f4b7 Add EXG instruction to the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 14:51:56 +01:00
Adrian Conlon
f1f64dad93 Add DEC and EOR instructions to the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 13:29:52 +01:00
Adrian Conlon
00ca20dbe4 Add DAA to the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 12:25:58 +01:00
Adrian Conlon
0882513762 Add CWAI command to the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 09:52:03 +01:00
Adrian Conlon
b4abd7c739 Add COM instruction to the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-21 09:01:15 +01:00
Adrian Conlon
aa1a461db7 Whoops: missed a couple bad type conversions in the 6809 processor 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-20 22:20:24 +01:00
Adrian Conlon
90805e76bf Try to share more flag adjustments in the 6809 implementation 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-20 22:18:41 +01:00
Adrian Conlon
9122b5aa76 Whoops: missed carry adjustment for the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-20 12:54:01 +01:00
Adrian Conlon
dad5ee8926 Add CMP implementations for the 6809 (tricky!) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-20 11:52:09 +01:00
Adrian Conlon
fc31ae84d5 Add 6809 CLR instructions. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 17:03:32 +01:00
Adrian Conlon
a5a8b6059d Add BIT instructions to the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 16:30:31 +01:00
Adrian Conlon
d17cd1777a Add ASL/ASR instructions for the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 16:18:06 +01:00
Adrian Conlon
a125c4c24c Implement AND for the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 14:08:49 +01:00
Adrian Conlon
33fbad7132 ADD instruction added to the 6809 implementation 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 12:58:44 +01:00
Adrian Conlon
cca7453e35 Refactor the 6809 a little to shift large blocks of code from the header. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 10:39:41 +01:00
Adrian Conlon
a7835b943a Add an implementation of ADC for the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 10:15:37 +01:00
Adrian Conlon
15e1258f40 Rearrange the 6809 code such that I can fire memory events. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 00:55:59 +01:00
Adrian Conlon
ab1d84703b Add a skeletal 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-19 00:18:08 +01:00