6502/EightBit
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518 Commits 1 Branch 0 Tags 113 MiB
ce9738eb4b
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49 Commits

Author SHA1 Message Date
Adrian Conlon
ce9738eb4b Fill out more 6809 disassembly + fix a bug in the TFR/EXG instructions: muddled up 8/16 bit transfers. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 22:48:08 +01:00
Adrian Conlon
fbc743a608 6809 Disassembly: Addressing mode: immediate byte added. More instructions decoded. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 13:11:43 +01:00
Adrian Conlon
2f632cdaf5 Another 6809 instruction and addressing mode disassembly added. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 11:29:15 +01:00
Adrian Conlon
a5e51f7140 Simplify the 6809 disassembler usage a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 10:43:12 +01:00
Adrian Conlon
983e2a5eb2 Start fleshing out the 6809 disassembler. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 01:19:22 +01:00
Adrian Conlon
a22c5a5c78 Add skeletal disassembler to the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-26 19:08:07 +01:00
Adrian Conlon
50826d36b6 Add a little pin documentation to the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-26 19:02:41 +01:00
Adrian Conlon
dc6803a5b6 Whoops: powerOn should always be public (6809) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-26 17:27:50 +01:00
Adrian Conlon
ef5e325b6d Tidy 6809 header file usage a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-26 13:07:26 +01:00
Adrian Conlon
ab78ba5db0 Start adding definition of BA/BS flags. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 14:55:57 +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
f8097af5a4 Whoops: correct overly enthusiastic shift on the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 12:57:04 +01:00
Adrian Conlon
adb6433737 Easier to read flag handling in the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 12:30:16 +01:00
Adrian Conlon
21e8360dc1 First stab at interrupt handling on the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 12:14:14 +01:00
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
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
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
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
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
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
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
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