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Author SHA1 Message Date
Thomas Harte
c73021cf3c Implement MOVE. 2022-05-23 08:46:06 -04:00
Thomas Harte
1b3acf9cd8 Eliminate assumption. 2022-05-23 08:18:37 -04:00
Federico Berti
1a26d4e409
Update nbcd_pea.json 
Add missing bracket
 2022-05-23 12:14:00 +01:00
Thomas Harte
c8ede400eb Fix RTE. 2022-05-22 21:17:28 -04:00
Thomas Harte
269263eecf Implement RTE, RTS, RTR. 2022-05-22 21:16:38 -04:00
Thomas Harte
4e21cdfc63 Enable NEGX/CLR tests. 2022-05-22 20:55:21 -04:00
Thomas Harte
faef5633f8 Ensure MOVE from SR has an effective address to write to. 2022-05-22 20:52:00 -04:00
Thomas Harte
7d1f1a3175 Implement MOVE [to/from] [CCR/SR]. 2022-05-22 19:45:22 -04:00
Thomas Harte
4e34727195 Fully implement TAS. 2022-05-22 16:14:03 -04:00
Thomas Harte
1dd6ed6ae3 Implement TAS Dn, with detour for other TASes. 2022-05-22 16:08:30 -04:00
Thomas Harte
cb4d6710df Switch to a more direct indication of progress. 2022-05-22 11:27:58 -04:00
Thomas Harte
3b68b9a83b Implement PEA. 2022-05-22 11:27:38 -04:00
Thomas Harte
4279ce87ea Implement LEA. 2022-05-22 08:29:12 -04:00
Thomas Harte
3c1c4f89e9 Add MULU/S functionality, though not timing. 2022-05-22 08:02:32 -04:00
Thomas Harte
4a6512f5d5 Reduce dispatch boilerplate. 2022-05-22 07:39:16 -04:00
Thomas Harte
284f23c6ea Implement JMP. 2022-05-22 07:16:38 -04:00
Thomas Harte
11a9a5c126 Use common macros for the two forms of Perform. 2022-05-22 07:08:14 -04:00
Thomas Harte
4993801741 Add missing prefetch to BSET, BCHG, BCLR. 2022-05-21 21:05:05 -04:00
Thomas Harte
4b35899a12 Bcc: properly establish offset. 2022-05-21 20:59:34 -04:00
Thomas Harte
1304e930eb DBcc is two-operand. 2022-05-21 20:06:03 -04:00
Thomas Harte
94288d5a94 Excludes DBcc from standard operand fetch. 2022-05-21 19:53:28 -04:00
Thomas Harte
3811ab1b82 Fix the two 8bit-with-displacement effective address Calc steps. 2022-05-21 16:20:01 -04:00
Thomas Harte
c869eb1eec Correct omission: wasn't testing the final PC. 
Plenty of new errors incoming.
 2022-05-21 15:56:27 -04:00
Thomas Harte
f97d2a0eb9 Add DIVU/DIVS, at least as far as getting the correct numeric result. 2022-05-21 15:56:09 -04:00
Thomas Harte
176c8355cb The tests in chk.json now pass. 2022-05-21 14:32:58 -04:00
Thomas Harte
2258434326 Ensure proper return addresses are calculated for JSR. 2022-05-21 14:28:44 -04:00
Thomas Harte
e46a3c4046 Implement JSR. 2022-05-21 10:29:36 -04:00
Thomas Harte
0e4cfde657 Fix MOVEM predec. 2022-05-21 08:17:39 -04:00
Thomas Harte
4bd9c36922 Fix postincrement mode. 2022-05-20 21:01:23 -04:00
Thomas Harte
256da43fe5 Fix MOVEM other than postinc and predec. 2022-05-20 20:47:54 -04:00
Thomas Harte
6a442e0136 MOVEM has an immediate first operand. 2022-05-20 20:34:51 -04:00
Thomas Harte
a818650027 Add a faulty attempt at MOVEM. 2022-05-20 18:48:19 -04:00
Thomas Harte
9d79e64f5c Add a mere calculate effective address pathway. 
Plus a lot of waffle to try to justify the further code duplication.
 2022-05-20 16:23:52 -04:00
Thomas Harte
c7c12f9638 After a quick check, eori_andi_ori also now passes. 2022-05-20 14:47:11 -04:00
Thomas Harte
ee942c5c17 Fix PC-relative fetches. 2022-05-20 14:42:51 -04:00
Thomas Harte
d157819c49 Implement the various to-[SR/CCR] actions, which do a 'repeat' prefetch. 
(which isn't exactly a repeat, at least in the SR cases, because the function code might have changed)
 2022-05-20 14:29:14 -04:00
Thomas Harte
2d91fb5441 Implement MOVEP. 2022-05-20 14:22:32 -04:00
Thomas Harte
81431a5453 Attempt BTST, BCHG, BCLR and BSET. 2022-05-20 12:58:45 -04:00
Thomas Harte
6d7ec07216 Uncover another three already-working test files. 2022-05-20 12:44:57 -04:00
Thomas Harte
b4978d1452 Implement BSR, adding one more test file to the working set. 2022-05-20 12:40:35 -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
45e9648b8c Implement Bcc. 2022-05-20 12:04:43 -04:00
Thomas Harte
ce32957d9d Shuffle two more into the working column. 2022-05-20 11:53:12 -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
4327af3760 DBcc: add write-back. 2022-05-20 11:37:18 -04:00
Thomas Harte
860cc63e21 Attempt DBcc. 2022-05-20 11:32:06 -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
e5c1621382 Add missing fallthrough, patterns for all ADDs and SUBs. 2022-05-20 07:02:02 -04:00
Thomas Harte
af3518dc1f Implement various ADD, SUB patterns. 2022-05-19 20:50:37 -04:00
Thomas Harte
6cfc0e80d9 Don't test the unrecognised instruction exception. 2022-05-19 19:45:38 -04:00