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212 Commits

Author SHA1 Message Date
Thomas Harte
bf7faa80c1 Add TODO. 2022-03-10 16:47:54 -05:00
Thomas Harte
a2ae3771eb Add test for switch to Source::IndirectNoBase. 2022-03-10 15:45:56 -05:00
Thomas Harte
673ffc50da Switch to intended compact version of Instruction. 2022-03-10 15:14:50 -05:00
Thomas Harte
6dc9973754 Incorporate length into Instruction. 2022-03-10 07:12:12 -05:00
Thomas Harte
cf6a910630 Handle no-base case directly in existing switch. 2022-03-09 20:20:32 -05:00
Thomas Harte
520baa6ec8 Formalise IndirectNoBase and permit a knowledgable caller to avoid conditionals. 2022-03-09 20:19:40 -05:00
Thomas Harte
bbf925a27e Clarify, unify and correct decoding and encoding of [CALL/RET/JMP][near/far/relative/absolute]. 2022-03-09 16:48:06 -05:00
Thomas Harte
381fd5dbe4 E8 is a relative call. 2022-03-09 16:37:07 -05:00
Thomas Harte
ead8b7437e Remove done TODO. 2022-03-09 15:26:20 -05:00
Thomas Harte
acd9df6745 Fix segment/offset sizes for far calls. 2022-03-09 15:23:43 -05:00
Thomas Harte
f96c051932 Record PUSH immediate operation size. 2022-03-09 14:24:57 -05:00
Thomas Harte
67b2e40fae Fixed: INs and OUTs remain single byte. 2022-03-09 10:51:16 -05:00
Thomas Harte
081a2acd61 Fix shift group operand size. 2022-03-09 09:33:25 -05:00
Thomas Harte
de79acc790 Fix RegAddr/AddrRegs and group 2 decoding. 2022-03-09 08:38:34 -05:00
Thomas Harte
21d4838322 Fix current implementation of data_segment. 
As far as it goes.
 2022-03-08 17:08:21 -05:00
Thomas Harte
926a373591 Extend SIB test, correct decoder. 2022-03-08 15:03:37 -05:00
Thomas Harte
a954f23642 Attempt 32-bit modregrm + SIB parsing. 2022-03-08 14:39:49 -05:00
Thomas Harte
41a104cc10 Adds special test/control/debug MOVs. 
This'll do; it's not ideal but avoids bloating up the `Source` enum.
 2022-03-07 17:04:05 -05:00
Thomas Harte
f0b4971c7b Correct SHLD format. 2022-03-07 16:39:02 -05:00
Thomas Harte
8e669a32a3 Take a stab at group 8. 2022-03-07 16:34:56 -05:00
Thomas Harte
0e16e7935e Correct double reference to Group 6. 2022-03-07 16:26:17 -05:00
Thomas Harte
7ea84d9a4e Add MOVZX, MOVSX. 2022-03-07 16:25:44 -05:00
Thomas Harte
7313c89dec Add BT, BTS, BTR, BTC, BSF, BSR. 2022-03-07 16:23:25 -05:00
Thomas Harte
35a66c03c2 Add the SETs. 2022-03-07 10:32:34 -05:00
Thomas Harte
bbb3168bae Adds the missing shift group segues at c0 and c1. 2022-03-07 09:18:59 -05:00
Thomas Harte
1ea9d3faf8 Introduce additional forms of IMUL. 2022-03-07 09:05:22 -05:00
Thomas Harte
4479be4fd0 Add the two immediate PUSHes. 2022-03-06 14:28:41 -05:00
Thomas Harte
91a6bf671d Also 'easy': LSS, LFS, LGS. 
Though perhaps I'm off on LES and LDS?
 2022-03-06 09:28:43 -05:00
Thomas Harte
49b5889d9e 0x8c is available on the 8086. 2022-03-06 09:24:59 -05:00
Thomas Harte
ede61ae130 Flag up TODOs, for easier in-editor navigation. 2022-03-05 17:48:01 -05:00
Thomas Harte
7a79111767 Add the easiest 80386 extensions: PUSH/POP FS/GS and longer conditional jumps. 2022-03-05 17:32:21 -05:00
Thomas Harte
6432521b9d Correct two references to JP that should be JL. 2022-03-05 17:16:32 -05:00
Thomas Harte
65f578fe61 Add notes on all missing opcodes. 2022-03-05 17:16:13 -05:00
Thomas Harte
3a8eb4a4f0 Add 80386 segment overrides. 2022-03-05 17:03:46 -05:00
Thomas Harte
eb180656bb Fix $8e data size, add $8c. 2022-03-05 17:00:48 -05:00
Thomas Harte
1afcbba218 Clarify sign extension availability. 2022-03-05 16:44:26 -05:00
Thomas Harte
8a0902a83b Adapts existing opcodes for 32-bit parsing. 2022-03-05 13:52:07 -05:00
Thomas Harte
dfb312fee6 Make column and row meanings overt. 2022-03-05 11:56:08 -05:00
Thomas Harte
11bb594fa2 Sets up [ignored] memory and data size prefixes. 2022-03-02 20:23:35 -05:00
Thomas Harte
8e3ae2c78f Add opcode map as documentation. 2022-03-02 20:00:21 -05:00
Thomas Harte
4b4135e35a Correct #undef. 2022-03-01 18:23:24 -05:00
Thomas Harte
d1148c4cab Switch to constexpr function, for guaranteed semantics. 2022-03-01 17:30:41 -05:00
Thomas Harte
8ee62b4789 Simplify address size semantics. 
Since it'll no longer be a mode-dependant toggle, but a fully-retained value.
 2022-03-01 17:29:26 -05:00
Thomas Harte
5e7a142ff1 Fix is_write errors, update comment, add additional source for asserts. 2022-03-01 16:51:54 -05:00
Thomas Harte
2c816db45e Refactor: (i) to expose effective address calculation; and (ii) to include address size in Instruction. 2022-03-01 09:36:37 -05:00
Thomas Harte
b920507f34 Double down on AddressT, add an assert on memory_mask. 2022-02-28 10:03:58 -05:00
Thomas Harte
afbc57cc0c Incorporate displacement, switch macro flag. 2022-02-28 09:53:23 -05:00
Thomas Harte
9f12c009d6 Correct data size when accessing address registers. 2022-02-27 19:45:03 -05:00
Thomas Harte
84ac68a58b Fix indirect memory read/write 2022-02-27 18:43:00 -05:00
Thomas Harte
27d1df4699 Introduce enough of a DataPointerResolver test to build but fail. 2022-02-27 18:27:58 -05:00
Thomas Harte
0d7a7dc7c9 Introduce DataPointerResolver, to codify the meaning of DataPointer and validate that enough information is present. 2022-02-27 11:25:02 -05:00
Thomas Harte
b8bff0e7f5 Double up eSP, eBP, eSI, eDI and AH, CH, DH, BH enums, as per Intel's encoding. 2022-02-24 05:16:15 -05:00
Thomas Harte
60bf1ef7ea Rename SourceSIB to DataPointer, extend to allow for an absent base. 2022-02-23 08:28:20 -05:00
Thomas Harte
95976d8b58 Add missing #include. 2022-02-21 16:33:58 -05:00
Thomas Harte
ecb20cc29b Improve tabbing. 2022-02-21 16:09:03 -05:00
Thomas Harte
b6183e86eb Clarifies model tests by macro; adds the address size toggle. 2022-02-21 16:06:02 -05:00
Thomas Harte
229af0380c This is normatively called the address size. 2022-02-21 15:52:16 -05:00
Thomas Harte
b968a662d3 Dump notes on intended Instruction layout, add memory size flag. 2022-02-21 15:48:58 -05:00
Thomas Harte
159e869fe6 Justifies the templatisation. 2022-02-21 15:33:08 -05:00
Thomas Harte
76814588b8 Template Instruction on its content size. 2022-02-21 12:36:03 -05:00
Thomas Harte
1934c7faa2 Switch Decoder into a template. 2022-02-21 12:21:57 -05:00
Thomas Harte
9e9e160c43 Eliminate Ind[BXPlusSI/etc] in favour of specifying everything via a ScaleIndexBase. 2022-02-21 11:45:46 -05:00
Thomas Harte
546b4edbf1 Ensure ScaleIndexBase can be used constexpr; add note-to-self on indexing table. 2022-02-20 19:22:28 -05:00
Thomas Harte
63d8a88e2f Switch to holding the SIB as a typed ScaleIndexBase. 
(and permit copy assignment)
 2022-02-20 17:54:53 -05:00
Thomas Harte
75d2d64e7c Albeit that it requires nuanced shift/roll semantics, eliminates CL constant. 
Shifts and rolls are already slightly semantically special for being undefined for values greater than 8/16/32 — i.e. in some implementations they don't even use the entirety of CL, just the low five bits. Which makes me feel a little better.

The upside of no ambiguity between eCX size 1 and CL justifies the trade.
 2022-02-20 17:52:19 -05:00
Thomas Harte
a5113998e2 Accept that IN and OUT are going to have special semantics, thereby kill ::AX and ::DX. 2022-02-20 17:15:01 -05:00
Thomas Harte
4d2e8cd71d Adds a presently-unreachable step for SIB consumption. 2022-02-19 18:00:27 -05:00
Thomas Harte
30b355fd6f Chips away further at the legacy register names. 2022-02-18 18:37:47 -05:00
Thomas Harte
12df7112da Starts adjusting the concept of a Source. 2022-02-17 11:32:09 -05:00
Thomas Harte
cd5ca3f65b Attempts a full decoding of the 80286 instruction set. 2022-02-10 17:13:50 -05:00
Thomas Harte
0bd63cf00f Introduces the easy F page instructions. 2022-02-10 09:35:05 -05:00
Thomas Harte
7ceb3369eb Attempts decoding of the 80186 set. 2022-02-09 17:51:48 -05:00
Thomas Harte
ae21726287 Splits 80186 additions from 80286; fills in a touch more. 2022-02-01 20:38:10 -05:00
Thomas Harte
a4da1b6eb0 Begins enumerating the 80286 and 80386 instructions. 2022-01-31 09:11:06 -05:00
Thomas Harte
85bfd2eba3 Remove further errant 'Awaiting's. 2022-01-31 08:22:07 -05:00
Thomas Harte
2d543590dc Make a noun, for better consistency. 2022-01-31 08:14:33 -05:00
Thomas Harte
2574407afb Relocates MinIntTypeValue to Numeric. 2021-06-22 19:33:02 -04:00
Thomas Harte
135134acfd Adds a shell for video emulation. 2021-03-18 12:47:48 -04:00
Cacodemon345
82717b39bb
Fix compilation on GCC 10 2021-03-13 01:27:29 +06:00
Thomas Harte
cbf5a79ee8 Takes a swing at improper key repeat. 2021-02-28 16:46:09 -05:00
Thomas Harte
5d1970d201 Adds a hacky different guess at how register access might work. 2021-02-19 21:46:18 -05:00
Thomas Harte
2e9065b34c Increases number of fixed initial values. 2021-02-18 22:48:53 -05:00
Thomas Harte
2a45e7a8d4 Slows timer X, to what may or may not be correct. 2021-02-15 16:40:27 -05:00
Thomas Harte
f8f0ff0fae Add timer X counting. 
Still no interrupts.
 2021-02-15 16:29:25 -05:00
Thomas Harte
f5dcff2f29 Honours interrupt vector. 2021-02-15 15:05:56 -05:00
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