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184 Commits

Author SHA1 Message Date
Adrian Conlon
68a785ceec Add an address masking to the memory mapping structure. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-01 23:43:29 +00:00
Adrian Conlon
7af81018c9 Modify rotate and shift instructions to be a little more understandable (6502/6809) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-01 19:47:21 +00:00
Adrian Conlon
4dc0becb74 Refactor the 6502 implementation to be a lot more like the MC6809. Hopefully show bugs in the latter a little more easily. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-31 23:29:13 +00:00
Adrian Conlon
edbc2784d9 Sort out why cycle counting wasn't working as I thought it should on the MC6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-28 13:34:34 +00:00
Adrian Conlon
99692ce6c7 Refactor MC6850 for C++14/17 updates 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 21:58:23 +01:00
Adrian Conlon
1a317c7907 C++14/17 refactoring for MC6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 21:55:54 +01:00
Adrian Conlon
8dbb3eafec Switch to C++17 standard in all EightBit projects. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 14:28:14 +01:00
Adrian Conlon
b50d21965d Addr support for the RTS/CTS and IRQ pins to the MC6850 chip emulation 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-23 00:01:33 +01:00
Adrian Conlon
4bfb264380 Simplify chip pin level matching a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-21 19:42:20 +01:00
Adrian Conlon
4840c238d6 Set configuration default to *not* exit early. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-21 18:07:42 +01:00
Adrian Conlon
806251bf6f Whoops: Remove extra blank line. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-21 18:07:08 +01:00
Adrian Conlon
54e0dcfe36 Move board termination and cycle count etc. into the configuration class. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-21 10:28:33 +01:00
Adrian Conlon
4d09da1541 Reuse standard 6809/6850 chip/bus wiring 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-20 22:54:10 +01:00
Adrian Conlon
1b2ddd8843 Don't expose the bus via the CPU any more: if a component needs the bus, it should be prepared to hold a reference to it. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-20 20:52:41 +01:00
Adrian Conlon
9b0cc4542f Tidy MC6809 test board/device access. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-20 16:57:32 +01:00
Adrian Conlon
dbc3e192d7 More sharing of common implementation on the MC6809. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-18 22:50:54 +01:00
Adrian Conlon
83497b0b9e Share some implementation details on the MC6809, where possible. Somewhat closer to how I imagine the hardware is implemented... 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-18 22:25:52 +01:00
Adrian Conlon
966a07b018 Reuse pul/psh definition to simplify entire register set save/restore code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-17 20:42:03 +01:00
Adrian Conlon
4b2f8e3599 Correct "LE" definition to at least match the MC6809 documentation. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-17 20:39:58 +01:00
Adrian Conlon
8c8438f819 Tidy the test code formatting a little 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 23:39:37 +01:00
Adrian Conlon
4e48f4a5a0 Slightly simplify half-carry evaluation. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 23:18:13 +01:00
Adrian Conlon
140e87485c Whoops: Correct dodgy CMP test. That explains why I never understood why it was failing! 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 21:26:33 +01:00
Adrian Conlon
9d71c78338 DEC/INC don't adjust carry flags 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 21:19:37 +01:00
Adrian Conlon
0c07d39250 Share (hopefully!) correct overflow implementations 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 21:19:03 +01:00
Adrian Conlon
707a742899 Not complete, but this gets large chunks of the MC6809 addition and subtraction parts of the emulator working correctly 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 20:40:20 +01:00
Adrian Conlon
769c65394b The extra _getch isn't required as I fix the MC6809 CPU emulation. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 20:38:07 +01:00
Adrian Conlon
12dc90c064 Add lots of tests, mainly covering addition and subtraction. Shows quite a few problems... 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 10:06:47 +01:00
Adrian Conlon
9445e7d1c4 Add test for CLRA implied 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-07 11:04:22 +01:00
Adrian Conlon
9296eaf954 Add test for BITA immediate. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-07 10:55:30 +01:00
Adrian Conlon
cf32f37fc3 Add test for ASRA inherent. And fix resulting bugs exposed! 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-07 10:48:27 +01:00
Adrian Conlon
f2b9ab0814 Add test for ASLA inherent. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-07 10:32:26 +01:00
Adrian Conlon
7719c8e875 Add test for ANDA immediate 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-07 10:08:12 +01:00
Adrian Conlon
1f4a84b803 Add test for ADDA immediate. Seems to be working. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-07 09:47:10 +01:00
Adrian Conlon
5dc185866e Add a test for ADCA immediate. Half carry and overflow flags incorrect! 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-07 09:14:30 +01:00
Adrian Conlon
7e57efd4cd Modification of unit test comments: no functional modification. 2018-10-06 23:54:33 +01:00
Adrian Conlon
fe05d468d6 Start adding MC6809 unit tests for each instruction. Just ABX, so far 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-06 23:52:39 +01:00
Adrian Conlon
0c174afc02 More MC6809 disassembly corrections: tabs and pshu/s puls/u stack order. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-03 20:15:44 +01:00
Adrian Conlon
f6cd8a4277 Properly disassemble MC6809 PULS/PULU PSHS/PSHU instructions to show registers. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-02 22:35:31 +01:00
Adrian Conlon
f58e3ded83 Use corrected MC6850 in MC6809 test board. Working a little better now. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-30 23:10:03 +01:00
Adrian Conlon
8ea7bf5d68 Refactoring on the MC6850 and associated test board code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-29 14:31:50 +01:00
Adrian Conlon
8d3551e681 Refactor bit set/get routines from processor class to lower level chip class. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-29 14:08:44 +01:00
Adrian Conlon
de5a9963e0 More MC6850 updates 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-29 10:06:02 +01:00
Adrian Conlon
f6bd871757 Whoops: correct 6809 stack pointer increment/decrement order 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-29 10:02:53 +01:00
Adrian Conlon
861fc28bba Wire up the MC6850 events to the board 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-25 23:57:20 +01:00
Adrian Conlon
df7c7904f4 Whoops: correct a small layout (tabs) issue. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-25 23:56:28 +01:00
Adrian Conlon
9ab075d0f6 Incorporate the concepts of transmission and receipt into the events for the MC6850 (TBC) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-24 08:29:11 +01:00
Adrian Conlon
d77c2a1e9d Add more of the MC6850 internals. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-23 20:31:55 +01:00
Adrian Conlon
b3faa0bb2e Wire the MC6850 chip into the MC6809 test code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-23 13:14:10 +01:00
Adrian Conlon
30ac7dc268 Whoops: missed movement of stdafx.h for MC6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-22 23:09:10 +01:00
Adrian Conlon
d45401d9b1 Tidy a couple of MC6809 niggles: 
1) Move the stdafx.h to the correct place (out of the include search path)
2) Simplify long branch extra cycle handling
3) Rename derived flag handling, to remove B prefix
4) Make interrupt mask flag handling a little easier to read

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-22 10:54:05 +01:00
Adrian Conlon
7c03521025 Refactor plsu/s pshu/s to share code more easily 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-21 00:28:08 +01:00
Adrian Conlon
6bb8118c7f Add miscellaneous documentation and test gubbins 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-21 00:17:25 +01:00
Adrian Conlon
7adefd380a Sort a bunch of missing argument const specifications. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-21 00:16:00 +01:00
Adrian Conlon
9e91d2adad Plug the 8K hole in the address space of the Grant Searle SBC with 0xff (held high) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-16 19:49:52 +01:00
Adrian Conlon
54bb9743be Correct 10/11 opcode prefix disassembly on the 6809 processor. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-16 17:56:55 +01:00
Adrian Conlon
fe3794e011 Simplify register16_t usage a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-16 12:00:29 +01:00
Adrian Conlon
7d840f1a42 Modifying the manner in which memory is mapped, allows a fairly clean mechanism for loading Intel "hex" files. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-15 14:35:59 +01:00
Adrian Conlon
a9adde6ea5 Correct 6809 CLR flag handling. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-30 01:37:46 +01:00
Adrian Conlon
8e0c1ebcde Modify the 6809 disassembler a little to give output more like xroar (for comparison purposes) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-30 01:37:09 +01:00
Adrian Conlon
c85176431b Refactor 6809 jsr/rts code a little. No functional changes. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-29 14:03:24 +01:00
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