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819 Commits

Author SHA1 Message Date
Thomas Harte
7788a109b0 Tweak more overtly to avoid divide by zero. 2022-05-29 20:51:50 -04:00
Thomas Harte
3ef53315a2 Don't try to append operands to 'None'. 2022-05-29 15:28:16 -04:00
Thomas Harte
3da720c789 Make requires_supervisor explicitly compile-time usable. 2022-05-29 14:55:24 -04:00
Thomas Harte
c97245e626 Fix CalcEA timing; make MOVEfromSR a read-modify-write. 2022-05-27 10:32:28 -04:00
Thomas Harte
463fbb07f9 Adapt remaining 68000 tests to use Mk2. 2022-05-25 10:55:17 -04:00
Thomas Harte
9e3c2b68d7 Eliminate potential future implicit conversion warnings. 2022-05-24 11:05:24 -04:00
Thomas Harte
3349bcaaed Attempt interrupt support. 2022-05-24 10:53:59 -04:00
Thomas Harte
6a442e0136 MOVEM has an immediate first operand. 2022-05-20 20:34:51 -04:00
Thomas Harte
cb77519af8 Make BSR operate like the other offsets: the flow controller gets whatever was in the opcode. 2022-05-20 12:40:09 -04:00
Thomas Harte
ba8592ceae At least on the 68000, Scc is read-modify-write. 2022-05-20 11:43:26 -04:00
Thomas Harte
452dd3ccfd Add a performer call-out for Scc; use it to implement proper timing in the mk2 68000. 2022-05-20 11:20:23 -04:00
Thomas Harte
eeb6a088b8 Add a tag to avoid duplication. 2022-05-19 15:49:42 -04:00
Thomas Harte
e4c0a89889 Just use the four-bit register number directly. 2022-05-19 15:01:09 -04:00
Thomas Harte
c6c6213460 Bifurcate the fetch-operand flow. 
Address calculation will be the same, but the fetch will differ. I don't think there's a neat costless way to factor out the address calculations, alas, but I'll see whether macros can save the day.
 2022-05-19 10:27:51 -04:00
Thomas Harte
3db2de7478 Works 68000 mk2 into the comparative tests. 
... revealing that I've leant a little too hard on __LINE__.
 2022-05-16 20:04:13 -04:00
Thomas Harte
acb63a1307 Pull generalised DIVU/DIVS into a macro. 2022-05-15 20:01:51 -04:00
Thomas Harte
341bf2e480 Repattern DIVS after DIVU. 2022-05-15 16:54:58 -04:00
Thomas Harte
ff8e4754d7 Ensure STOP exits the run loop. 2022-05-14 19:17:32 -04:00
Thomas Harte
27c4d19455 Support STOP. 2022-05-14 11:35:35 -04:00
Thomas Harte
f83954f5b7 Switch to common bit-selection logic. 2022-05-13 15:08:15 -04:00
Thomas Harte
77b56c50e6 Ensure you can't trace into divide-by-zero, etc. 2022-05-13 14:02:56 -04:00
Thomas Harte
002a8c061f Trim the public interface of Executor. 2022-05-13 13:55:37 -04:00
Thomas Harte
4299334e24 Clean up some TODOs, eliminate one further conditional. 2022-05-13 11:17:57 -04:00
Thomas Harte
4d03c73222 Ensure that the first instruction of privilege/line1010/etc exceptions isn't traced. 2022-05-13 11:08:22 -04:00
Thomas Harte
7a2fd93d08 Document BusHandler interface. 2022-05-13 10:59:36 -04:00
Thomas Harte
5b67c9bf4a MOVE to SR requires supervisor privileges. 2022-05-13 09:01:03 -04:00
Thomas Harte
6c854e8ecc Simplify is_supervisor semantics. 2022-05-13 07:53:40 -04:00
Thomas Harte
2e796f31d4 Support interrupts; documentation to come. 2022-05-12 20:52:24 -04:00
Thomas Harte
2fa6b2301b Move string logic into Preinstruction. 2022-05-12 19:46:08 -04:00
Thomas Harte
a6e4d23c29 Tidy up primarily as per PatickvL's comments. 
... though pulling the flag values out of an enum and into a namespace is entirely my own contribution, to keep them in their own namespace but having them overtly be ints.
 2022-05-12 16:23:07 -04:00
Thomas Harte
6d43576db7 Remove errant semicolon. 2022-05-12 16:21:36 -04:00
Thomas Harte
b7d1bff0c7 Eliminate branches from ABCD. 2022-05-12 15:25:01 -04:00
Thomas Harte
79c5af755f Eliminate branches from SBCD. 2022-05-12 15:18:03 -04:00
Thomas Harte
c6d84e7e60 Use Status::FlagT pervasively. 2022-05-12 11:42:33 -04:00
Thomas Harte
192513656a After much guesswork, fix SBCD and thereby pass flamewing tests. 2022-05-12 11:39:01 -04:00
Thomas Harte
f3c1b1f052 Name flags, remove closing underscores on exposed data fields. 2022-05-12 08:19:41 -04:00
Thomas Harte
bd61c72007 Mutate SBCD to correct values, though not yet statuses. 2022-05-12 07:22:26 -04:00
Thomas Harte
0efeea1294 Slightly improve SBCD. Not there yet though. 2022-05-12 07:07:21 -04:00
Thomas Harte
a9902fc817 Fix ABCD when the result has an invalid lower digit. 2022-05-11 16:31:27 -04:00
Thomas Harte
d492156453 Add noreturn attribute as a warning. 2022-05-11 10:51:48 -04:00
Thomas Harte
96af3d5ec5 Fix infinite inner/outer loop. 2022-05-11 10:26:12 -04:00
Thomas Harte
69ba14e34e Support the trace flag. 2022-05-11 09:39:15 -04:00
Thomas Harte
943c924382 Add missing: MOVE to/from USP, RESET. 2022-05-11 07:52:23 -04:00
Thomas Harte
4b97427937 Remove further magic constants. 2022-05-11 07:00:35 -04:00
Thomas Harte
ab8e1fdcbf Take a swing at access faults and address errors. 2022-05-10 16:20:30 -04:00
Thomas Harte
477979c275 Fully formulate and document the flow controller. 2022-05-10 10:34:07 -04:00
Thomas Harte
c635720a09 Tidy up; provide a notification for bit-change operations. 2022-05-10 08:23:25 -04:00
Thomas Harte
f2a6a12f79 Remove further vestiges of timing. 2022-05-09 20:58:51 -04:00
Thomas Harte
7445c617bc Start removing 68000-specific timing calculations. 2022-05-09 20:32:02 -04:00
Thomas Harte
8e7340860e Minor thematic rearrangement. 2022-05-09 16:35:17 -04:00
Thomas Harte
2ca1eb4cf8 Move set_pc into the operation-specific group. 2022-05-09 16:20:15 -04:00
Thomas Harte
0af8660181 Remove add_pc and decline_branch in favour of operation-specific signals. 2022-05-09 16:19:25 -04:00
Thomas Harte
2f7cff84d9 Enable missing rotates and shifts. 2022-05-09 11:26:01 -04:00
Thomas Harte
8e5650fde9 Clean up Instruction.hpp. 2022-05-09 10:13:42 -04:00
Thomas Harte
539932dc56 Provide function codes. TODO: optionally. 2022-05-09 09:18:02 -04:00
Thomas Harte
e35de357fa Route reads and writes through a common path. 2022-05-08 17:17:46 -04:00
Thomas Harte
0818fd7828 Ensure no status updates fall through the cracks. 2022-05-07 21:29:12 -04:00
Thomas Harte
98cb9cc1eb Fix CHK operand size. 2022-05-07 21:16:44 -04:00
Thomas Harte
bf8c97abbb Permit TRAP, TRAPV and CHK to push the next PC rather than the current. 2022-05-07 20:32:39 -04:00
Thomas Harte
ad6cf5e401 Pull out magic constant, simplify sp and TAS. 2022-05-07 20:20:24 -04:00
Thomas Harte
2b3900fd14 Fix LINK A7. 2022-05-07 08:15:26 -04:00
Thomas Harte
1defeca1ad Implement RTS, RTR, RTE. 2022-05-06 12:30:49 -04:00
Thomas Harte
ac6a9ab631 Fix TAS Dn. 2022-05-06 12:23:04 -04:00
Thomas Harte
8176bb6f79 Expose issues with TST and TAS. 2022-05-06 12:18:56 -04:00
Thomas Harte
9c266d4316 Proceed to unimplemented TST. 2022-05-06 11:33:57 -04:00
Thomas Harte
190a351a29 Fix address writeback. 2022-05-06 09:56:01 -04:00
Thomas Harte
607ddd2f78 Preserve MOVEM order in Operation. 2022-05-06 09:45:06 -04:00
Thomas Harte
fed79a116f Be overt about the size being described here. 2022-05-06 09:22:38 -04:00
Thomas Harte
5db0ea0236 Add note for my tomorrow self. 2022-05-05 21:11:02 -04:00
Thomas Harte
06fe320cc0 Correct source counting, but this leaves the operands still being the wrong way around. 2022-05-05 21:06:53 -04:00
Thomas Harte
f7991e18de Makes a failed attempt to implement MOVEM to registers. 2022-05-05 20:32:21 -04:00
Thomas Harte
d7d0a5c15e Implement MOVEM to memory. 2022-05-05 18:51:29 -04:00
Thomas Harte
47f4bbeec6 Switch to a contiguous block of 16 registers. 2022-05-05 15:31:59 -04:00
Thomas Harte
9ab70b340c Route MOVEM appropriately. 2022-05-05 12:42:57 -04:00
Thomas Harte
70cdc2ca9f Fix MOVEP to register. 
Advance to lack of MOVEM.
 2022-05-05 12:37:47 -04:00
Thomas Harte
f63a872387 BTST does not write back. 2022-05-05 12:32:15 -04:00
Thomas Harte
67462c2f92 Rewire MOVEP. 2022-05-05 12:27:36 -04:00
Thomas Harte
4a4e786060 Hit a realisation: write-back isn't going to work with MOVEP as formulated. 2022-05-05 09:26:26 -04:00
Thomas Harte
665f2d4c00 Attempts MOVEP. 2022-05-05 09:00:33 -04:00
Thomas Harte
64586ca7ba Implement BTST/etc. 2022-05-04 20:57:22 -04:00
Thomas Harte
15c90e546f Fix rotates and shifts to memory. 2022-05-04 19:44:59 -04:00
Thomas Harte
5aabe01b6d Mostly fix LINK and UNLK. 2022-05-04 08:41:55 -04:00
Thomas Harte
5d1d94848c Take a bash at LINK and UNLK. 2022-05-04 08:26:11 -04:00
Thomas Harte
7d10976e08 Add LINK and UNLINK to operand_flags. 2022-05-03 20:51:02 -04:00
Thomas Harte
d3b55a74a5 Fix LEA, proceed to non-functional LINK and UNLK. 2022-05-03 20:45:36 -04:00
Thomas Harte
de58ec71fd Fix EXT, SWAP. 2022-05-03 20:17:36 -04:00
Thomas Harte
052ba80fd7 Add enough wiring to complete but fail EXT and JMP/JSR. 2022-05-03 15:49:55 -04:00
Thomas Harte
39f0ec7536 Get far enough through CHK to realise that MOVEM probably needs to be divided by direction. 2022-05-03 15:40:04 -04:00
Thomas Harte
af973138df Correct decoding of Bcc.b, satisfying Bcc and BSR tests. 2022-05-03 15:32:54 -04:00
Thomas Harte
5a87506f3d Fix Bcc, making decision that add_pc is relative to start of instruction. 2022-05-03 15:21:42 -04:00
Thomas Harte
90f0005cf2 Proceed to failing Bcc and flagging up my lack of an implementation for BSR. 2022-05-03 14:45:49 -04:00
Thomas Harte
d8b3748d24 Fix Scc size, DBcc behaviour. 2022-05-03 14:40:51 -04:00
Thomas Harte
1b224c961e Fix Scc, add operand flags for DBcc. 2022-05-03 14:23:57 -04:00
Thomas Harte
b6ffff5bbd Distinguish [ADD/SUB]QA from [ADD/SUB]Q. 2022-05-03 14:17:26 -04:00
Thomas Harte
b3cf13775b Consume operand_flags into Instruction.hpp. 2022-05-03 11:09:57 -04:00
Thomas Harte
c61809f0c4 Add CMPAl. 2022-05-03 09:20:02 -04:00
Thomas Harte
2f2d6bc08b Correct CMPw. 2022-05-03 09:05:34 -04:00
Thomas Harte
1bb809098c Switch — messily — to a more compact way of indicating sequence. 2022-05-03 09:04:54 -04:00
Thomas Harte
011506f00d Add basic exceptions. 2022-05-02 21:27:58 -04:00
Thomas Harte
25ab478461 Fix immediate byte and word fetches. 2022-05-02 20:17:44 -04:00
Thomas Harte
fc9a35dd04 Test add/sub, add an exception for invalid Sequences. 2022-05-02 20:09:38 -04:00
Thomas Harte
7efe30f34c Fix (d8, _, Xn) calculation. 2022-05-02 15:09:59 -04:00
Thomas Harte
3827ecd6d3 Proceed to complete test running. 2022-05-02 12:57:45 -04:00
Thomas Harte
14532867a4 Sneaks towards testing EXT. 2022-05-02 08:00:56 -04:00
Thomas Harte
73f340586d Proceed to building, but failing tests. 2022-05-02 07:45:07 -04:00
Thomas Harte
56fe00c5fb Correct errors preparatory to Executor's lack of flow controller actions. 2022-05-01 20:40:57 -04:00
Thomas Harte
3c26177239 Provide both compile- and run-time operation selection options. 2022-05-01 17:39:56 -04:00
Thomas Harte
fe8f0d960d Equivocate. 
(Specifically: addresses cannot generally be obtained in advance, as they are often the product of registers, but things like displacements, immediate values and absolute addresses can)
 2022-05-01 15:30:03 -04:00
Thomas Harte
c72caef4fd Correct further size specifiers. 2022-05-01 15:21:58 -04:00
Thomas Harte
0720a391e8 Correct address register mutations. 2022-05-01 15:18:06 -04:00
Thomas Harte
d16ac70a50 Correct include path. 2022-05-01 15:14:12 -04:00
Thomas Harte
fc8e020436 Improve field name. 2022-05-01 15:12:13 -04:00
Thomas Harte
6b073c6067 Attempt to round out addressing modes, shift to a header, as per templating on BusHandler. 2022-05-01 15:10:54 -04:00
Thomas Harte
0b19bbff8d Marginally refactor, to avoid repetition of read/write branch. 2022-05-01 13:09:28 -04:00
Thomas Harte
42927c1e32 Establish more of the 680x0 executor loop. 2022-05-01 13:00:20 -04:00
Thomas Harte
df999978f1 Figure out what the call to perform should look like. 
Albeit that this class doesn't currently offer any of the proper flow control actions.
 2022-04-30 20:34:44 -04:00
Thomas Harte
43cd740a7b Shuffle Step to give meaning to the LSB. 2022-04-30 20:33:35 -04:00
Thomas Harte
52f355db24 Decision: operation is not a template parameter. Hence can use condition as fully typed. 2022-04-30 14:08:51 -04:00
Thomas Harte
a86c5ccdc9 Merge branch '68000Perform' of github.com:TomHarte/CLK into 68000Perform 2022-04-30 14:02:23 -04:00
Thomas Harte
e532562108 Merge branch 'master' into 68000Perform 2022-04-30 14:02:17 -04:00
Thomas Harte
8d24c00df2 Include decoded condition in Preinstruction. 2022-04-30 09:00:47 -04:00
Thomas Harte
f4074e0bba Add basic status. 2022-04-30 08:38:28 -04:00
Thomas Harte
e4426dc952 Introduce calculate EA steps. 2022-04-29 20:30:48 -04:00
Thomas Harte
9359f6477b Start drafting an Executor. 2022-04-29 17:12:06 -04:00
Thomas Harte
a103f30d51 Attempt to game out LEA, PEA. Add various special MOVEs. 2022-04-29 14:43:58 -04:00
Thomas Harte
78b60dbd1a Evict MOVEM and MOVEP, enable TRAP and TRAPV, complete CHK. 2022-04-29 14:43:30 -04:00
Thomas Harte
cde75a1c00 Make steps more visible. 2022-04-29 11:26:39 -04:00
Thomas Harte
b9d243552c MOVEs don't read from operand 2. 2022-04-29 11:22:06 -04:00
Thomas Harte
85242ba896 Add to Xcode project, template on Model as per CLR being odd. Fill in some obvious answers. 2022-04-29 11:10:14 -04:00
Thomas Harte
d16dab6f62 Starts introducing a sequencer, to resolve responsibility of perform. 2022-04-29 10:40:19 -04:00
Thomas Harte
8066b19f93 Correct typos. 2022-04-29 07:57:02 -04:00
Thomas Harte
abd2a831a3 Added a further ambiguity. 2022-04-29 05:08:44 -04:00
Thomas Harte
824d3ae3f7 Conclusion: a union does produce better code. 
(But needn't be so verbose)
 2022-04-29 04:51:02 -04:00
Thomas Harte
727a14c6f9 Add notes for myself on decisions yet to make. 2022-04-29 03:53:17 -04:00
Thomas Harte
13d20137d3 Tackle two lingering references to exception_handler. 2022-04-29 03:38:23 -04:00
Thomas Harte
9680566595 Include in automated build, temporarily. 2022-04-28 20:42:44 -04:00
Thomas Harte
33c9ea2cf7 A flow controller feels more natural than an exception handler. 2022-04-28 20:42:04 -04:00
Thomas Harte
1d8d2b373b Port all simple instruction bodies. 2022-04-28 16:55:47 -04:00
Thomas Harte
611b472b12 Add evaluate_condition, to check standard 68000 condition codes. 2022-04-28 16:54:57 -04:00
Thomas Harte
bb73eb0db3 Start working on an isolation of 68000 instruction execution. 2022-04-28 15:35:40 -04:00
Thomas Harte
39261436c8 Remove unused type alias. 2022-04-27 19:53:32 -04:00
Thomas Harte
5e355383df Correct SIB test. 2022-04-27 19:53:15 -04:00
Thomas Harte
9cbbb6e508 Adjust path to match namespace; add to Qt project. 2022-04-27 08:05:36 -04:00
Thomas Harte
8902bb1af0 Include size and supervisor flag in Preinstruction. 2022-04-26 19:44:02 -04:00
Thomas Harte
baf1bd354d Avoid packing/unpacking of operands. 2022-04-26 19:37:07 -04:00
Thomas Harte
539c2985aa Fill in size table, define quick to return a uint32_t. 2022-04-26 12:30:14 -04:00
Thomas Harte
5c356e15b5 Completes requires_supervisor. 2022-04-25 20:05:45 -04:00
Thomas Harte
8ff0b71b29 Subsume MOVEQ into MOVE.l; add missing invalid_operands. 2022-04-25 19:58:19 -04:00
Thomas Harte
8f8f201186 Complete transition to simple AND-based verification. 2022-04-25 16:23:16 -04:00
Thomas Harte
0c688757b0 Adapt the last of the MOVEs, TAS, NOT, SUB and TST. 2022-04-25 16:05:44 -04:00
Thomas Harte
5778e92e70 Adapt MOVE, DIV, MUL, OR. 2022-04-25 15:43:25 -04:00
Thomas Harte
3268ea42ff Translate SUB, PEA. 2022-04-25 12:41:41 -04:00
Thomas Harte
1538500903 Add enough to make AND masks the default case. 2022-04-25 12:30:44 -04:00
Thomas Harte
6ca30a16ca Update JMP, JSR. 2022-04-25 12:05:07 -04:00
Thomas Harte
e6dc2e0d31 Add EXG, EXT. 2022-04-25 11:49:14 -04:00
Thomas Harte
9bbd1390c1 Add new-style validation of EORI to CCR, move EXG decoding into page navigation. 2022-04-25 11:43:30 -04:00
Thomas Harte
27f8db6e8b Update DBcc, DIVU/DIVS, EOR. 2022-04-25 09:49:18 -04:00
Thomas Harte
dda0c0e097 Update CMPM, CMPI. 2022-04-25 09:39:22 -04:00
Thomas Harte
f5ea5c26a3 Translate CHK, CLR, CMP, CMPA. 2022-04-24 21:05:00 -04:00
Thomas Harte
d01fa96177 Port BSR, BTST. 2022-04-24 20:49:41 -04:00
Thomas Harte
03caa53863 Translate BSET. 2022-04-24 19:58:10 -04:00
Thomas Harte
4f4a2e6d92 Translate ASL, ASR, Bcc, BCHG, BCLR. 2022-04-24 19:53:54 -04:00
Thomas Harte
87178ed725 Port AND. 2022-04-24 15:12:18 -04:00
Thomas Harte
94e5436f6e Attempt a more compact retelling. 2022-04-24 14:47:14 -04:00
Thomas Harte
b965f2053a Start experimenting with a simple AND for operand validation. 2022-04-24 10:43:06 -04:00
Thomas Harte
edee078f0a Eliminate last set of failures. 2022-04-22 20:57:45 -04:00
Thomas Harte
d4b766bf3f Introduce directional ADD/SUB/AND/OR. 
Just 512 failures to go.
 2022-04-22 20:37:09 -04:00
Thomas Harte
72772c9a83 Remove branch from combined_mode. 
On x86 it was probably only a conditional move, but this is fine.
 2022-04-22 15:11:41 -04:00
Thomas Harte
4c806d7c51 Tidy up slightly, ahead of a final push to getting complete test success. 
After which I can start undoing style errors.
 2022-04-22 14:51:25 -04:00
Thomas Harte
96afcb7a43 Introduce remainder of tests. 2022-04-22 14:33:43 -04:00
Thomas Harte
efeee5160e Add tests for RTE, RTR, TRAP, TRAPV, CHK. 2022-04-22 10:06:39 -04:00
Thomas Harte
06fb502047 Add MUL/DIV tests and exclusions. 2022-04-22 09:47:16 -04:00
Thomas Harte
977192f480 Resolve D-page decoding errors. 
In particular: that I'd overlooked CMPM, and was treating NOT as two-operand.
 2022-04-22 09:24:16 -04:00
Thomas Harte
cf66d9d38d Add failing tests for EOR, NOT, OR; disambiguate EOR vs CMP. 2022-04-21 20:36:04 -04:00
Thomas Harte
25eeff8fc5 Correct CMP decoding, correct AND as far as asymmetry of Dn, Dn. 2022-04-21 20:14:52 -04:00
Thomas Harte
bf9fc0ae96 Correct decoding of BSR. 2022-04-21 16:24:34 -04:00
Thomas Harte
a8a1a74b79 Correct BSRb quick value. 2022-04-21 16:13:06 -04:00
Thomas Harte
549e440f7c Add 'quick' decoding and testing. 2022-04-21 16:05:00 -04:00
Thomas Harte
45c02c31f8 Add MOVEM exclusions. 2022-04-21 15:47:34 -04:00
Thomas Harte
b6b092d124 Add tests, exclusions for rest of shift/roll group. 2022-04-21 11:26:56 -04:00
Thomas Harte
3af93ada6f Test and correct Bcc, BSR, CLR, NEGX, NEG. 2022-04-20 20:19:56 -04:00
Thomas Harte
dc16928f74 Add appropriate exclusions for JSR, JMP, Scc. 2022-04-20 16:56:26 -04:00
Thomas Harte
80ff146620 Add CMP, CMPA and TST tests and exclusions. 2022-04-20 16:29:45 -04:00
Thomas Harte
d4fe9d8166 Complete BTST/etc exclusions. 2022-04-20 16:16:24 -04:00
Thomas Harte
85a0af03c1 Import more standard JSON; start validating. 2022-04-20 09:17:00 -04:00
Thomas Harte
dc43f5605b Give MOVEPs precedence. 2022-04-20 08:40:56 -04:00
Thomas Harte
fab064641f Add Move[to/from][SR/CCR/USP] tests, correct decodings. 2022-04-20 07:59:13 -04:00
Thomas Harte
316e9681cc Weed out false PEAs. 2022-04-19 20:34:08 -04:00
Thomas Harte
4181313cc6 Correct decoding of SWAP. 2022-04-19 20:28:00 -04:00
Thomas Harte
6aabc5e7b0 Test LEA, PEA, add name for MOVEq. 2022-04-19 19:45:51 -04:00
Thomas Harte
343a8e0192 Resolve wrong-headed mapping of LEA to MOVEAl. 2022-04-19 19:36:21 -04:00
Thomas Harte
ef87d09cfa Clear up MOVEs, fail on MOVEAs. 2022-04-19 17:13:23 -04:00
Thomas Harte
d21c67f237 Don't permit byte move from address register. 2022-04-19 16:49:26 -04:00
Thomas Harte
de40fed248 Test MOVEs and add operand validation. 2022-04-19 16:31:03 -04:00
Thomas Harte
76d7e0e1f8 Test and correct SUBs. 2022-04-19 16:27:20 -04:00
Thomas Harte
1f585d67b6 ADDA: correct decoding, add validation. 2022-04-19 14:43:01 -04:00
Thomas Harte
5b22e94a4b Map invalid reg+mode combinations to AddressingMode::None; add validation of ADDs and decoding of ADDX. 2022-04-19 14:36:36 -04:00
Thomas Harte
7749aef6b6 Improve const correctness. 2022-04-19 14:35:40 -04:00
Thomas Harte
5de8fb0d08 Disallow four illegal NBCD addressing modes. 2022-04-19 09:59:02 -04:00
Thomas Harte
19f7335926 Add post validation step. 2022-04-19 09:44:02 -04:00
Thomas Harte
99f4cd867d Decode the two EXTs. 2022-04-19 08:42:17 -04:00
Thomas Harte
93fe3459fd The quick value won't always fit in reg; turf the problem elsewhere. 2022-04-19 08:37:35 -04:00
Thomas Harte
1abd3bd7f3 Decode SWAP. 2022-04-19 08:37:13 -04:00
Thomas Harte
fc4fd41be4 Reorder from most specific to least. 2022-04-19 08:00:52 -04:00
Thomas Harte
e4c6251ef5 Express the BSR/Bcc.l test properly. 2022-04-18 14:42:31 -04:00
Thomas Harte
7aa250eaf7 Advances to hitting the same absent/present mapping as the old decoder. 2022-04-18 14:41:26 -04:00
Thomas Harte
ff380b686a Decode MOVEq. 2022-04-18 09:12:45 -04:00
Thomas Harte
d2452f4b68 Fix SUBQ ExtendedOperation mappings. 2022-04-18 09:08:49 -04:00
Thomas Harte
deb9c32a38 Add missing Sccs. 2022-04-18 09:04:17 -04:00
Thomas Harte
440f45b996 Attempt decoding and disambiguation of Scc, DBcc, Bcc and BSR. 2022-04-18 08:55:46 -04:00
Thomas Harte
7d64c4ec66 Add STOP. 2022-04-18 08:29:10 -04:00
Thomas Harte
7fe0d530c1 Add a decoder for TRAP. 2022-04-18 08:05:33 -04:00
Thomas Harte
c944767554 Better document decoding patterns, add LEA and CHK. 2022-04-18 08:00:43 -04:00
Thomas Harte
fde5a1c507 Ensure ADDI, SUBI, etc, provide an operation. 2022-04-18 07:42:30 -04:00
Thomas Harte
1991ed0804 Introduce failing [partial-]test of new 68000 decoder. 2022-04-18 07:23:25 -04:00
Thomas Harte
4eb752b000 Even out tabs. 2022-04-15 20:41:39 -04:00
Thomas Harte
bfb29a58f3 Take another crack at neatness; make LEA overt. 2022-04-15 20:33:59 -04:00
Thomas Harte
f86e455a87 Advance permissively through the 4xxx page to LEA. 2022-04-15 16:01:33 -04:00
Thomas Harte
faa35fe9fc Decode MOVE and the fixed 0x4xxx set. 2022-04-15 15:40:31 -04:00
Thomas Harte
89b8b59658 Ostensibly completes the 0 line. 2022-04-15 15:33:54 -04:00
Thomas Harte
de55a1adc4 Require a model for decoding; shift a bunch of immediates into ExtendedOperation. 2022-04-15 09:40:37 -04:00
Thomas Harte
d1613025ee For now, assume the .q actions can be handled inside Preinstruction. 2022-04-13 09:29:12 -04:00
Thomas Harte
cc4431c409 Expand decode to accept a wider array of operations, and then funnel them down. 2022-04-12 16:17:30 -04:00
Thomas Harte
3d5986c55d Some minor style changes, plus I think I've talked myself into an expanded Operation-tracking enum. Probably. 2022-04-12 14:54:11 -04:00
Thomas Harte
9aeb6ee532 Formally prepare for one- and two-operand instructions. 2022-04-12 09:14:46 -04:00
Thomas Harte
e7f6cc598d Make first attempt to complete broad phase of decoding. 2022-04-12 09:08:46 -04:00
Thomas Harte
cd465dd121 Decode page E. 2022-04-12 09:04:40 -04:00
Thomas Harte
174b48a14a Populate lines 9 and D. 2022-04-12 08:57:40 -04:00
Thomas Harte
bca18e7aba Fill in line decoders for 5, 6 and 7. 
This leaves 9, D and E to go.
 2022-04-12 08:44:32 -04:00
Thomas Harte
17e761d6c6 Add enough code to pages 0–3 to shift problem to decode(). 2022-04-12 08:36:44 -04:00
Thomas Harte
c50556dde4 Create empty line decoders. 2022-04-12 08:16:29 -04:00
Thomas Harte
dd5bdd67d7 Add B page and a large chunk of 4. 2022-04-12 07:49:08 -04:00
Thomas Harte
21ac9363e9 Add page 8. 2022-04-11 16:32:57 -04:00
Thomas Harte
8e3cccf4d6 Begins a formalised 68k decoder. 2022-04-11 15:00:55 -04:00
Thomas Harte
bb5cf570e5 Remove conditional, make generic enough for both 32- and 64-bit operation. 2022-04-10 15:18:23 -04:00
Thomas Harte
7002d6d306 Improve accuracy of comment. 2022-04-10 09:37:18 -04:00
Thomas Harte
1b8d8f3a04 Default to 32-bit versions. 2022-04-10 09:35:58 -04:00
Thomas Harte
284440336d Correct rotate_mask(). 2022-04-10 09:31:39 -04:00
Thomas Harte
140ae7a513 Clarify template parameters. 2022-04-10 08:57:09 -04:00
Thomas Harte
7de50b5e2e Provide 64-bit me, mb and sh. Add direct getter for rotate masks. 2022-04-09 21:08:01 -04:00
Thomas Harte
4652a84b43 Add exposition. 2022-04-09 19:20:13 -04:00
Thomas Harte
9e0755bc86 Introduce overlooked: ld, ldu, rldclx, rldcrx, rldicx, rldiclx, rldicrx, rldimix. 2022-04-09 18:28:51 -04:00
Thomas Harte
da0f7d7907 Rearrange into alphabetical order. 2022-04-09 10:20:03 -04:00
Thomas Harte
88d72bf31d Fill in more mnemonics. 2022-04-08 10:01:52 -04:00
Thomas Harte
aac2f7dd73 Add missing validations. 2022-04-08 09:47:04 -04:00
Thomas Harte
1f44ad1723 Completes test cases. 2022-04-06 21:09:58 -04:00
Thomas Harte
4ab1857a11 Complete MPC601 commentary. 2022-04-06 20:53:44 -04:00
Thomas Harte
d23c714ec7 Build in an optional post hoc validation. 
TODO: validate.
 2022-04-05 11:23:54 -04:00
Thomas Harte
59a1fde2a1 Fix is_zero_mask. 2022-04-03 20:37:09 -04:00
Thomas Harte
31276de5c3 Complete 'misc instructions' tests. 2022-04-03 20:33:32 -04:00
Thomas Harte
c581aef11d Test as far as mffs. 2022-04-03 18:29:40 -04:00
Thomas Harte
7f6a955a71 Complete the cmp set. 2022-04-03 15:50:03 -04:00
Thomas Harte
125d97cc41 Complete floating point tests. 2022-04-03 08:55:28 -04:00
Thomas Harte
de7d9ba471 Add further floating point tests. 2022-04-03 08:06:59 -04:00
Thomas Harte
ad54b44235 Begin documentation and testing of the floating point instructions. 2022-04-02 19:58:21 -04:00
Thomas Harte
42532ec0f5 Test floating point loads and stores. 2022-04-02 15:40:17 -04:00
Thomas Harte
b84fa619da Test integer loads and stores. 2022-04-02 15:27:12 -04:00
Thomas Harte
8a1409184f Add decoding of lwa. 2022-04-02 10:31:55 -04:00
Thomas Harte
8a3c16a5bc Add lwa. 2022-04-02 10:26:47 -04:00
Thomas Harte
6343c65ce2 Document further; mftb is optional. 2022-04-02 10:09:58 -04:00
Thomas Harte
d5967f7834 Correct decoding of stwcx. and stdcx. 2022-04-01 20:37:36 -04:00
Thomas Harte
d5f7650ac1 Test synchronising loads and stores, further expand documentation. 2022-04-01 18:30:48 -04:00
Thomas Harte
8f580c256c Remove explanations; saying nothing is better than giving incomplete advice. 2022-04-01 17:49:34 -04:00
Thomas Harte
7c8f044380 Complete shift tests. 2022-04-01 17:22:32 -04:00
Thomas Harte
8efd506471 Transcribe up to the end of 'e', use extswx and remove extsw. 2022-04-01 17:11:57 -04:00
Thomas Harte
e83267751e Start shuffling parameters into conventional order; expand on cmp–cmpli, dcbf–dcbz. 2022-03-30 20:36:46 -04:00
Thomas Harte
84f0b0a84c Test rotates. 2022-03-30 16:43:09 -04:00
Thomas Harte
52e7226655 Merge branch 'PowerPCTests' of github.com:TomHarte/CLK into PowerPCTests 2022-03-29 20:50:40 -04:00
Thomas Harte
b89c8decd4 Test addx–divwx and mtcrf; document fields for crand, etc. 2022-03-29 20:48:43 -04:00
Thomas Harte
d783975597 Start offering a list of relevant fields per Operation. 2022-03-29 19:59:21 -04:00
Thomas Harte
5ec291df5c Merge branch 'PowerPCTests' of github.com:TomHarte/CLK into PowerPCTests 2022-03-29 14:38:28 -04:00
Thomas Harte
0a45355055 Add a few more field comments. 2022-03-29 14:37:21 -04:00
Thomas Harte
99ad40f3e0 Test subfcx, subfx; correct decoding of oe(). 2022-03-28 20:39:52 -04:00
Thomas Harte
b9c8016aca Merge branch 'PowerPCTests' of github.com:TomHarte/CLK into PowerPCTests 2022-03-28 20:20:59 -04:00
Thomas Harte
8ad1f2d4f5 Add bad attempt to catch subfc. 2022-03-28 20:18:41 -04:00
Thomas Harte
dc30581be0 Fix typo; . -> , 2022-03-28 16:39:55 -04:00
Thomas Harte
2e56b606fa Improve file division, document some further operations. 2022-03-27 18:44:56 -04:00
Thomas Harte
d84c72afe5 Test loads and stores, and immediate arithmetic. 2022-03-27 08:47:01 -04:00
Thomas Harte
4f6a9917c6 Test lbzx, lbzux. 2022-03-26 08:45:07 -04:00
Thomas Harte
3d48183753 Test lwzux. 2022-03-25 20:31:47 -04:00
Thomas Harte
33c31eb798 Test lwzx. 2022-03-25 20:23:21 -04:00
Thomas Harte
73ae7ad82f Resolve final branch test: aa() applies. 2022-03-25 20:10:08 -04:00
Thomas Harte
1a5d3bb69c Match majority of branch tests. 2022-03-25 08:41:57 -04:00
Thomas Harte
7d4fe55d63 Handle bclrx set and clear. 2022-03-25 06:25:06 -04:00
Thomas Harte
089e03afe8 Navigates bcctrx tests, adding simplified bo() helpers and bi() helpers. 2022-03-24 20:44:03 -04:00
Thomas Harte
8e019f01ab Document dozx and dozi. 2022-03-21 10:49:01 -04:00
Thomas Harte
77bdaf3c78 These are likely to be useful outside of the decoder. 2022-03-21 10:41:17 -04:00
Thomas Harte
0b6828c895 Decision: these enums will be at namespace scope. 2022-03-21 10:19:30 -04:00
Thomas Harte
d4704c656f Merge branch 'PowerPCTests' of github.com:TomHarte/CLK into PowerPCTests 2022-03-21 10:18:36 -04:00
Thomas Harte
c01192c784 Add exposition for absx to divsx. 2022-03-21 10:17:55 -04:00
Thomas Harte
8adb611edf Attempt to clarify with an enum. 2022-03-19 12:27:28 -04:00
Thomas Harte
e5af5b57ad Add documentation for bx, bcx, bcctrx. 
Catch bcx tests.
 2022-03-18 19:55:26 -04:00
Thomas Harte
1725894fe9 Eliminate redundant CMPSD, CDQ, CWDE. 
Also removes IBTS for now, as I'm unclear where it should sit in the opcode map.
 2022-03-12 12:24:44 -05:00
Thomas Harte
fd4f85eb19 Add SMSW. 2022-03-12 12:23:48 -05:00
Thomas Harte
f1c4864016 Eliminate INSD. 2022-03-12 11:37:21 -05:00
Thomas Harte
e6bd265729 Explain which BOUNDs operand is which. 2022-03-11 20:34:28 -05:00
Thomas Harte
c22e8112e7 Expand exposition. 2022-03-11 20:30:56 -05:00
Thomas Harte
44252984c2 Eliminate INT3 special case. 2022-03-11 14:03:46 -05:00
Thomas Harte
4b4f92780e Shuffle extension word order. 
The primary objective here is simplifying index calculation, but as per the note it does also potentially open up options with regard to packing in the future.
 2022-03-11 13:24:45 -05:00
Thomas Harte
f694620087 Resolve TODO. 2022-03-11 13:10:44 -05:00
Thomas Harte
9b4048ec6e The address size modifier doesn't seem to affect far address sizes. 
It's meant to affect only instructions with operands that reside in memory, I think. So probably only ::DirectAddress in my nomenclature. More research to do.
 2022-03-11 12:46:07 -05:00
Thomas Harte
c744a97e3c Ensure no extensions for default constructed Instruction. 2022-03-11 11:55:26 -05:00
Thomas Harte
91d75d7704 Switch strategy on 8086 instruction lengths. 2022-03-11 09:48:26 -05:00
Thomas Harte
dc8cff364f Switch to common test. 2022-03-11 09:48:02 -05:00
Thomas Harte
572dc40e6b Allow assignments. 2022-03-11 09:47:23 -05:00
Thomas Harte
f92ffddb82 Add instruction length limits. 2022-03-10 20:47:56 -05:00
Thomas Harte
641e0c1afc Resolve default segment question. 2022-03-10 20:27:35 -05:00
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