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Commit Graph

103 Commits

Author SHA1 Message Date
Thomas Harte
ce5aae3f7d Adjust more dangling indentation changes. 2024-12-04 22:29:08 -05:00
Thomas Harte
17ff0c4f65 Fix PLD/PLB sizes. 2024-09-21 21:28:38 -04:00
Thomas Harte
ff6753fcdf PEI: don't page wrap. 2024-09-21 21:12:04 -04:00
Thomas Harte
a65551f652 Give PLB the same stack behaviour as PLD. 2024-09-21 21:08:02 -04:00
Thomas Harte
f0d807a0fe Fix [d], y page-wrapping behaviour. 2024-09-21 20:49:59 -04:00
Thomas Harte
eb9e5fb727 Eliminate various unnecessary uses of std::make_pair. 2024-05-29 21:46:33 -04:00
Thomas Harte
c0eb401d04 Add a between-instructions enforcement of SH = 1. 2023-08-05 14:57:43 -04:00
Thomas Harte
e61a4eb5a9 Regularise PHD and PLD. 2023-07-30 16:36:29 -04:00
Thomas Harte
acd7f9f4cd Fix stack usage of JSL. 2023-07-30 16:34:42 -04:00
Thomas Harte
9f1a657cc4 Fix stack usage of PEA. 2023-07-30 16:33:44 -04:00
Thomas Harte
e52d1866ab Fix PEI stack usage. 2023-07-30 16:32:56 -04:00
Thomas Harte
a02b8222fa Fix stack usage of PER. 2023-07-30 16:29:56 -04:00
Thomas Harte
3762ee1a63 Fix stack usage of PHD. 2023-07-30 16:29:15 -04:00
Thomas Harte
3ec61e8770 Fix stack usage of RTL. 2023-07-30 16:27:13 -04:00
Thomas Harte
2f7dd0b01a Correct stack behaviour of PLD. 2023-07-30 16:26:29 -04:00
Thomas Harte
ed2d4ebb0c Fix test (and commentary) for shortened emulated branches. 2023-04-15 23:30:30 -04:00
Thomas Harte
4467eb1c41 Ensure relevant throwaway stack reads use the previous stack address.
TODO: can CycleFetchPreviousThrowaway be used more widely?
2022-06-24 14:00:03 -04:00
Thomas Harte
a23b0f5122 Map STA (d), y to correct calculator. 2022-06-23 20:57:47 -04:00
Thomas Harte
944e5ebbfa Take another run at IO addresses. 2022-06-22 15:28:11 -04:00
Thomas Harte
7dcfa9eb65 65816: improve decimal calculations, posted IO addresses, read/write during redundant read-modify-write cycle. 2022-06-21 14:33:06 -04:00
Thomas Harte
ec98736bd7 Ensure IO cycles don't produce an address of (PC+1). 2022-06-21 11:41:05 -04:00
Thomas Harte
574a37814c Attempts to fix exception selection and timing. 2020-12-08 18:46:30 -05:00
Thomas Harte
9e0e063f8a Resolves one further GCC warning.
Technically this leaves one further, on a temporary printf I have in my IIgs. I'll fix that when I strip all this caveman stufff.
2020-11-22 21:57:48 -05:00
Thomas Harte
d3c7253981 Shifts size-limiting of X and Y to transitions and mutations, away from reads.
Primarily to remove potential bug-causing complexity — this is easier to debug. But let's see.
2020-11-04 20:35:41 -05:00
Thomas Harte
5cbb91f352 Fixes COP vector, ensures WDM skips a byte. 2020-11-03 20:01:02 -05:00
Thomas Harte
bf85d71674 Brings ADC into conformance. Fixes JML. 2020-11-03 18:12:10 -05:00
Thomas Harte
0178aaee2b Attempts retroactively to enforce the rule that 8-bit index modes => no top byte.
(Rather than a preserved but ignored top byte)
2020-11-02 18:55:28 -05:00
Thomas Harte
e8943618dc Adds some extra commentary and distinguishes X/Y sizing from M. 2020-10-31 10:21:13 -04:00
Thomas Harte
1ae2f6f449 PHD and PLD should always be 16-bit; PLP 8-bit. 2020-10-31 09:22:35 -04:00
Thomas Harte
88e26b42f5 Fixed: PHP pushes only 8 bits regardless of mode. 2020-10-30 22:36:00 -04:00
Thomas Harte
266022b193 Fixes PEA. 2020-10-28 22:00:28 -04:00
Thomas Harte
1df2ce513a Ensures that reset doesn't push to the stack. 2020-10-28 21:23:35 -04:00
Thomas Harte
1e4679ae14 Corrects JSL and RTL. 2020-10-28 17:25:40 -04:00
Thomas Harte
b3ab9fff9b Imports a custom-built copy of Klaus Dormann's 65C02 test, with only 65816-compatible parts.
Thereby fixes another couple of 65816 issues — BRK(, etc) not clearing the decimal flag, and `TRB d` being mismapped.
2020-10-19 19:27:16 -04:00
Thomas Harte
14718b93a4
Improve commentary. 2020-10-19 09:32:50 -04:00
Thomas Harte
99eba2f8ba Ensures intended 65816 exception behaviour.
i.e. the relevant micro-op sequence exists, and its operation isn't lost. Also sets the 65816 by default to jump straight into power-on, not to execute an instruction first. That shouldn't make a functional difference, but it makes debugging easier because it makes startup fully deterministic.
2020-10-18 14:43:47 -04:00
Thomas Harte
3b398f7a9a Attempts to complete all 65816 bus signalling. 2020-10-16 21:56:20 -04:00
Thomas Harte
096add7551 Exposes non-BusOperation bus outputs. 2020-10-16 21:05:42 -04:00
Thomas Harte
c0a1c34012 Wraps all registers into a struct, so that I can implement abort.
Makes some preparations for ready too.
2020-10-15 18:42:38 -04:00
Thomas Harte
27afb8f0a7 Adds direct indirect long test, and thereby fixes addressing mode.
Nine to go!
2020-10-14 21:26:20 -04:00
Thomas Harte
b22aa5d699 Starts transcribing the addressing examples I have into tests.
Correspondingly extends the exposed register set and test-machine addressing range.
2020-10-13 21:38:30 -04:00
Thomas Harte
8f5537aaaa Attempts to resolve my direct-indirect addressing stumble. 2020-10-13 20:21:53 -04:00
Thomas Harte
a15d4a156b Starts trying to ensure appropriate address wrapping. 2020-10-12 22:33:43 -04:00
Thomas Harte
7479dc74ed Removes printf. It's no longer telling me anything. 2020-10-12 21:52:58 -04:00
Thomas Harte
28da1a724a Introduces Jeek816 test case. 2020-10-12 21:43:44 -04:00
Thomas Harte
f529eadbec Corrects 16-bit read-modify-write.
Subject to the TODO proviso on 'correct'; has my 6502 prejudice pushed me into unrealistic bus signalling?
2020-10-12 18:36:09 -04:00
Thomas Harte
5dc3cd3a2f Starts using Jeek816 for a basic native-mode audit. Fixes absolute long addressing. 2020-10-11 22:02:46 -04:00
Thomas Harte
a0885ab7d0 Implements STP and WAI.
Albeit still without fully-implemented reactions to exceptions in general.
2020-10-11 17:56:55 -04:00
Thomas Harte
8eaf1303a3 Attempts proactively to ensure proper RTI behaviour on the 65816. 2020-10-11 15:25:13 -04:00
Thomas Harte
20cbe72985 Ties to 8- or 16-bit those instructions that aren't M/X-dependent.
This is technically redundant for PEI, PEA and PER since they have dedicated bus programs anyway, but it's good to be explicit.
2020-10-11 14:38:35 -04:00