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927 Commits

Author SHA1 Message Date
Thomas Harte
eccf5ca043 Makes first effort to wire up the ADB vertical blank input. 
However: looking at the disassembly, I'm not sure it really is wired to INTR. So work to do.
 2021-02-14 22:20:58 -05:00
Thomas Harte
c284b34003 Resolves inability of ADB microcontroller to read its own ROM (!) 2021-02-13 17:53:40 -05:00
Thomas Harte
2c4dcf8843 Edges towards implementing an ADB device. 2021-02-12 21:50:24 -05:00
Thomas Harte
e83b2120ce Tidies up, allows Operations and AddressingModes to be posted directly to ostreams. 2021-02-10 21:46:56 -05:00
Thomas Harte
3c7f9a43ad Merge branch 'AppleIIgs' of github.com:TomHarte/CLK into AppleIIgs 2021-02-08 18:43:27 -05:00
Thomas Harte
82312d3b59 Provide a more convincing version of port output. 2021-02-08 18:14:08 -05:00
Thomas Harte
93a80a30d3 With correct divider appears to get reset requests posted. 2021-02-07 23:05:01 -05:00
Thomas Harte
77b1efd176 Sets sensible 'reset' values. 2021-02-07 21:53:57 -05:00
Thomas Harte
acfab1dfb3 Starts to make some effort at timers. 2021-02-06 21:02:44 -05:00
Thomas Harte
819e9039ab Corrects printed target address for ZeroPageRelative. 2021-02-04 20:54:31 -05:00
Thomas Harte
b8c6d4b153 Rips out my high-level ADB microcontroller protocol implementation. 
Adds just enough that the main computer validates the ADB controller as present and talking.
 2021-01-30 17:53:27 -05:00
Thomas Harte
5eddc92846 Implements direction registers. 2021-01-28 21:06:11 -05:00
Thomas Harte
f50e8b5106 If I'm going to maintain the max_address approach, & is 'correct'. 
% +1 would be 'more correct', but I think this approach is probably misguided.
 2021-01-27 18:31:11 -05:00
Thomas Harte
dcc2fe0990 Improves M50470 entry-point detection, adds test output. 2021-01-26 21:29:17 -05:00
Thomas Harte
56111c75ae Makes first efforts towards disassembly. 2021-01-26 19:52:30 -05:00
Thomas Harte
cc90935abd Starts to provide just a touch of reflection. 2021-01-26 19:22:00 -05:00
Thomas Harte
413e42e1b6 Attempts to fix BBC. 
But thereby stops all ADB output.
 2021-01-25 22:34:03 -05:00
Thomas Harte
fc4bda0047 Experimentally flipping interpretation of the output bit gives something closer to coherent. 2021-01-25 22:02:39 -05:00
Thomas Harte
c8beb59172 Attempts properly to track ADB bus activity. 
Output is not yet a valid ADB stream. Work to do.
 2021-01-25 17:43:22 -05:00
Thomas Harte
8789ffda15 Corrects performer storage, RMW/W confusion, implicit casts, port readback. 2021-01-24 22:30:42 -05:00
Thomas Harte
e8e604dc3c Attempts to wire up M50470 and GLU. 
Resulting in an unexpected interest in R15. Bugs to find, I guess.
 2021-01-24 18:07:05 -05:00
Thomas Harte
57e0fdfadc Ensures ADB microcontroller is clocked. 
And runs at the 'correct' speed (i.e. modulo my instruction-by-instruction implementation).
 2021-01-23 22:55:12 -05:00
Thomas Harte
36aebe0ff9 Posts cycle lengths. 2021-01-23 21:58:52 -05:00
Thomas Harte
051d2b83f4 Corrects TSX lookup. 2021-01-23 15:45:21 -05:00
Thomas Harte
17b12120eb Corrects bit-selection shifts. 2021-01-21 23:13:00 -05:00
Thomas Harte
6e9ce50569 Corrects duration-based iteration. 2021-01-21 23:05:43 -05:00
Thomas Harte
adef2e9b4e Starts formalising end conditions. 2021-01-21 22:36:44 -05:00
Thomas Harte
0fafbf5092 Completes M50740 instruction set. 2021-01-21 19:08:38 -05:00
Thomas Harte
c10c161d39 Implements ADC and SBC. 2021-01-21 18:53:24 -05:00
Thomas Harte
04024ca159 Adds BIT. 2021-01-20 21:41:43 -05:00
Thomas Harte
64d556f60f Implements shifts and rotates. 2021-01-20 21:39:13 -05:00
Thomas Harte
8564e7406b Corrects index-mode CMP, LDA. 2021-01-20 21:32:46 -05:00
Thomas Harte
ebdb58d790 Seemingly advances to the first indefinite loop. 2021-01-20 21:18:52 -05:00
Thomas Harte
cf8afc70b2 Takes a swing at BBC, BBS. 2021-01-20 20:52:04 -05:00
Thomas Harte
4f02e8fbaf Knocks off the low-hanging instruction fruit. 2021-01-20 20:41:35 -05:00
Thomas Harte
6e618a6bb7 Adds a list of missing instructions. 
Not looking too bad; subject to not yet having a strategy for interrupts, timing, nothing yet implemented for timers, IO ports...
 2021-01-20 20:37:35 -05:00
Thomas Harte
df1bc18fb3 Pushes ahead to what will be my first interaction with the T flag. 2021-01-20 20:27:09 -05:00
Thomas Harte
9f12ce2fb8 Corrects RTS, adds the remainder of the direct flag manipulations. 2021-01-20 20:16:55 -05:00
Thomas Harte
b9672c0669 Gets beyond a prima facie convincing JSR/RET. 2021-01-20 18:21:44 -05:00
Thomas Harte
e58608b25a Gets as far as executing a first loop. 2021-01-20 18:15:24 -05:00
Thomas Harte
e502d76371 Corrects immediate instruction length, muddles through to having to parse a second program segment. 
Albeit with JSR not yet properly implemented.
 2021-01-19 22:12:18 -05:00
Thomas Harte
b0c790f3c6 Adds enough flags seemingly to reach an ASL. 2021-01-19 21:54:15 -05:00
Thomas Harte
aa478cd222 Stops trying to force bit ID into the addressing mode. 2021-01-19 21:51:01 -05:00
Thomas Harte
c78c121159 Succeeds at executing a single instruction. 2021-01-18 20:16:01 -05:00
Thomas Harte
e71e506883 This assert is redundant; not worth an extra #include. 2021-01-18 17:56:40 -05:00
Thomas Harte
a601ac0cab Corrects performer population, lookup, calls. 2021-01-18 17:53:14 -05:00
Thomas Harte
9b92753e0a In theory this should 'execute' up to the first unconditional branch. 
Where execution means: do very little.
 2021-01-18 17:11:11 -05:00
Thomas Harte
ec0018df79 Routes in the ADB keyboard ROM. This should get as far as parsing. 2021-01-18 16:59:49 -05:00
Thomas Harte
8b19c523cf Starts to bend towards getting some performers in motion. 2021-01-18 16:45:52 -05:00
Thomas Harte
5ace61f9b9 Continues walking very slowly towards cached execution. 2021-01-18 11:20:45 -05:00
Thomas Harte
8a74f5911c Minor reorganisation to finish the day. 2021-01-17 21:56:15 -05:00
Thomas Harte
4982430a29 Takes a run at most of the remaining addressing modes. 2021-01-17 21:52:16 -05:00
Thomas Harte
dea79c6dea Adds missing #include. 2021-01-17 20:56:22 -05:00
Thomas Harte
ad03858c6e Switches performers to member functions. Very slightly starts work on M50740 performers. 2021-01-17 20:53:11 -05:00
Thomas Harte
54b26c7991 Bends to using 8-bit lookups for M50740 instructions. 2021-01-17 20:03:36 -05:00
Thomas Harte
17c3a3eb4b Seeks to switch to maintaining a bank of performers. 
My thinking here is that for really simple processors there'll be 256 or less, meaning that they can be stored by simple uint8_t; for every other processor I can currently think of it'll likely be uint16_t.

Either way, that's a much better outcome than using plain pointers, which on architectures I currently build for will always be 8 bytes. For the simple processors I can get eight times as much into the cache; for the others four times.
 2021-01-17 19:38:23 -05:00
Thomas Harte
5f413a38df Switches all American-style dates. 
I'd failed to configure my new computer appropriately, it seems.
 2021-01-16 22:09:19 -05:00
Thomas Harte
8860d0ff51 Starts to establish the CachingExecutor. 2021-01-16 22:06:16 -05:00
Thomas Harte
8bd471fa3c Corrects recursive call. 2021-01-16 21:50:48 -05:00
Thomas Harte
cd6ac51aa6 Muddles along to generating functions. 
Albeit right now without a body.
 2021-01-16 21:45:44 -05:00
Thomas Harte
10caa1a1fb Steps gingerly towards execution. 2021-01-16 20:51:02 -05:00
Thomas Harte
722e0068ca Adds additional exposition. 2021-01-16 20:10:20 -05:00
Thomas Harte
8f2eea8819 Corrects AccessType::Read. 2021-01-16 20:04:48 -05:00
Thomas Harte
3b2d65fa16 Adds access type declaration. 2021-01-16 20:04:01 -05:00
Thomas Harte
3dc36b704a Starts on the next piece: parsers. 2021-01-16 19:54:40 -05:00
Thomas Harte
37a20e125c Completes the M50740 decoder. 
Completely untested.
 2021-01-15 22:47:52 -05:00
Thomas Harte
2910faf963 Adds missing #include. 2021-01-15 22:33:14 -05:00
Thomas Harte
1acb8c3c42 Completes the opcode map. 2021-01-15 22:24:37 -05:00
Thomas Harte
f667dd223f Advances to 50% of the opcode map. 2021-01-15 22:05:34 -05:00
Thomas Harte
e0d90f69ec Fills in the first quarter of the opcode map. 2021-01-15 21:58:46 -05:00
Thomas Harte
d82187bee2 Decides to shove bit number into AddressingMode. 2021-01-15 21:50:05 -05:00
Thomas Harte
3c20e1f037 Adds files for the M50740 and corrects namespace errors elsewhere. 2021-01-15 21:30:30 -05:00
Thomas Harte
9c2c918760 Better sorts by function, corrects TEST description. 2021-01-15 21:07:02 -05:00
Thomas Harte
47d20699d8 Completes list, ensures POP acts as documented. 2021-01-15 20:48:31 -05:00
Thomas Harte
e8ce70dccb Chips further away at documentation. 2021-01-15 18:52:59 -05:00
Thomas Harte
fa4938f29c Establishes the reason I'm sort-of documenting these. 2021-01-15 18:27:55 -05:00
Thomas Harte
ddb4bb1421 Better plans project layout. 2021-01-15 18:16:01 -05:00