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144 Commits

Author SHA1 Message Date
Adrian Conlon
cec760767a Fix some problems in the MC6809 instruction decoder. 
Found by going through the switch line by line...
BASIC interpreter now seems to run!

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-20 08:51:17 +00:00
Adrian Conlon
859804d179 Refactor MC6809 core to use lambdas in preference to std::bind methods. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-18 22:15:49 +00:00
Adrian Conlon
fdbb28828f Apply the concept of powered components to the "board" 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-11 16:48:44 +00:00
Adrian Conlon
f29c571226 Add tests for BHI BLE on the 6809 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-10 20:48:43 +00:00
Adrian Conlon
b926f4b7f1 Simplify 6809 conditionals a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-10 20:31:14 +00:00
Adrian Conlon
b82ca402bf Add 6809 BGT tests. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-10 20:30:38 +00:00
Adrian Conlon
8b12ed23e8 Add (currently disabled) disassembler to the 6809 unit test runner. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-10 20:29:27 +00:00
Adrian Conlon
e688411cb9 Refactor memory related code a little to make the hierarchy of classes a little easier to understand. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-04 16:38:57 +00:00
Adrian Conlon
8ef5d97366 Update boost from 1.65 -> 1.68 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-04 12:58:01 +00:00
Adrian Conlon
9132f2028f Add an "UnusedMemory" class to better allow "gaps" in the memory map. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-03 23:11:48 +00:00
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