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74 Commits

Author SHA1 Message Date
Adrian Conlon
46b140dda1 Correct issues with the 6809 indirect indexed addressing mode. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-29 13:25:19 +01:00
Adrian Conlon
b0addc5100 Correct a couple of minor issues in the 6809 disassembler 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-28 18:28:00 +01:00
Adrian Conlon
52ad4e6996 Tidied the 6809 disassembler a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-28 16:46:15 +01:00
Adrian Conlon
3dfea03b2e In theory, this finishes the 6809 disassembler. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-28 13:56:06 +01:00
Adrian Conlon
67b5fe1658 Add two more pieces of 6809 documentation 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-28 08:30:56 +01:00
Adrian Conlon
c22b3fca3b Correct 6809 disassembly prefix issue. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-28 08:18:00 +01:00
Adrian Conlon
837ac495ab Couple more 6809 disassembly instructions added, up to the point of an instruction oddity... 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 23:50:18 +01:00
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
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
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
974d5fbd14 Only show disassembled output, when there is actually something to show (fixes 6809 startup/interrupt sequence) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 10:25:15 +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
87b7295fe8 Remove unused "Resource" folder from the 6809 test project 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 01:18:49 +01:00
Adrian Conlon
2d6b9d9ecf Add some more 6809 documentation. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-26 19:10:04 +01:00
Adrian Conlon
e88cbc269b Add a skeletal half way house between a 6809 tester and a CoCo 2 emulator. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-26 19:09:34 +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
ae66b39dac Add a couple of LIKELY/UNLIKELY specifications to the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 12:51:43 +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
bca7977a23 Whoops: correctly generalise DAA code on the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 13:05:29 +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
0649796575 Small code tidy in the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-24 12:36:25 +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
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