Thomas Harte
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98d3da62b5
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Apply E mode wrap for d,x and d,y only when DL = 0.
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2022-09-09 16:02:35 -04:00 |
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Thomas Harte
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45dc99fb9d
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Further improve exposition.
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2022-09-09 15:48:25 -04:00 |
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Thomas Harte
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4ddbf095f3
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Fully banish flush from the processors.
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2022-07-12 10:49:53 -04:00 |
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Thomas Harte
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c2938a4f63
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Avoid potential classic macro error with address.
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2022-06-29 15:09:52 -04:00 |
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Thomas Harte
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4467eb1c41
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Ensure relevant throwaway stack reads use the previous stack address.
TODO: can CycleFetchPreviousThrowaway be used more widely?
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2022-06-24 14:00:03 -04:00 |
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Thomas Harte
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069a057a94
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Resolve assumption of arithmetic shifts.
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2022-06-24 07:26:07 -04:00 |
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Thomas Harte
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4ed3b21bf3
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Decimal SBC tweak: negative partial results don't cause carry.
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2022-06-23 21:58:09 -04:00 |
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Thomas Harte
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a23b0f5122
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Map STA (d), y to correct calculator.
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2022-06-23 20:57:47 -04:00 |
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Thomas Harte
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da552abf75
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Fix BIT overflow flag.
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2022-06-23 15:24:51 -04:00 |
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Thomas Harte
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380b5141fb
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Be overt about conversion wanted here.
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2022-06-23 13:03:26 -04:00 |
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Thomas Harte
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66775b2c4e
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Always consume a second cycle in 16-bit mode.
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2022-06-23 12:46:51 -04:00 |
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Thomas Harte
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2c12a7d968
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Make absolutely sure there's no address bit 24.
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2022-06-23 12:12:02 -04:00 |
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Thomas Harte
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5a97c09238
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Flip internal presumption on the BRK flag.
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2022-06-23 11:23:00 -04:00 |
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Thomas Harte
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3112376943
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Don't include DBR in direct indexed indirect.
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2022-06-23 11:03:37 -04:00 |
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Thomas Harte
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ecfd17a259
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Report a 1 in the stack pointer high byte when in emulation mode.
It has one internally, it just wasn't previously exposed via this method.
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2022-06-22 15:55:34 -04:00 |
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Thomas Harte
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a72dd96dc6
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Page boundary crossing is free outside of emulation mode.
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2022-06-22 15:31:30 -04:00 |
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Thomas Harte
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944e5ebbfa
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Take another run at IO addresses.
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2022-06-22 15:28:11 -04:00 |
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Thomas Harte
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76767110b7
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Fix overflow for 8-bit calculations; essentially a revert for ADC.
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2022-06-22 15:18:47 -04:00 |
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Thomas Harte
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7dcfa9eb65
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65816: improve decimal calculations, posted IO addresses, read/write during redundant read-modify-write cycle.
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2022-06-21 14:33:06 -04:00 |
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Thomas Harte
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ec98736bd7
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Ensure IO cycles don't produce an address of (PC+1).
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2022-06-21 11:41:05 -04:00 |
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Thomas Harte
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586ef4810b
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Add restart_operation_fetch, to aid with testing.
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2022-06-18 16:25:57 -04:00 |
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Thomas Harte
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c8471eb993
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Adds various asserts, some comments.
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2021-03-03 20:47:45 -05:00 |
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Thomas Harte
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83d0cfc24e
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Improves commentary.
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2021-03-03 20:33:28 -05:00 |
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Thomas Harte
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f6466fd657
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Remove temporary hackery.
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2021-02-19 22:47:50 -05:00 |
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Thomas Harte
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72d7901c88
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Takes a shot at the keyboard data full flag.
Just a guess. But likely?
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2021-02-19 20:06:12 -05:00 |
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Thomas Harte
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992ee6d631
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Don't zero out the program bank until after it has headed stackward.
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2021-02-17 22:08:08 -05:00 |
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Thomas Harte
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3c887aff95
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Improves consistency.
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2021-01-21 18:58:22 -05:00 |
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Thomas Harte
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e0b36c9c3d
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Corrects PBR/DBR resetting upon an exception.
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2020-12-29 15:27:49 -05:00 |
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Thomas Harte
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574a37814c
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Attempts to fix exception selection and timing.
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2020-12-08 18:46:30 -05:00 |
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Thomas Harte
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c72bdd776e
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Adds a new assert: I think this is the issue getting into GS/OS.
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2020-12-07 22:43:24 -05:00 |
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Thomas Harte
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9e0e063f8a
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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.
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2020-11-22 21:57:48 -05:00 |
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Thomas Harte
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8ace258fbc
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Tackles outstanding GCC warnings.
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2020-11-22 21:43:56 -05:00 |
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Thomas Harte
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cdacf280e1
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After much extra logging, corrects destination bank for MVN and MVP.
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2020-11-15 16:08:29 -05:00 |
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Thomas Harte
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d3c7253981
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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.
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2020-11-04 20:35:41 -05:00 |
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Thomas Harte
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d50b059a17
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Imports 6502-esque test for decimal SBC overflow.
All applicable krom tests now pass.
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2020-11-03 20:37:30 -05:00 |
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Thomas Harte
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cc5ec78156
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Provides something on WAI/STP; sizes STY by the x flag; disables MSC test.
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2020-11-03 20:17:44 -05:00 |
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Thomas Harte
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5cbb91f352
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Fixes COP vector, ensures WDM skips a byte.
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2020-11-03 20:01:02 -05:00 |
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Thomas Harte
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91ea2eff4c
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Corrects MVN/MVP off-by-one and failure to store what was read.
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2020-11-03 18:29:35 -05:00 |
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Thomas Harte
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bf85d71674
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Brings ADC into conformance. Fixes JML.
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2020-11-03 18:12:10 -05:00 |
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Thomas Harte
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3889646d6b
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Takes a swing at incorporating krom's 65816 test suite. At least as far as ADC.
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2020-11-02 21:09:32 -05:00 |
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Thomas Harte
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0178aaee2b
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Attempts retroactively to enforce the rule that 8-bit index modes => no top byte.
(Rather than a preserved but ignored top byte)
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2020-11-02 18:55:28 -05:00 |
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Thomas Harte
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e8943618dc
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Adds some extra commentary and distinguishes X/Y sizing from M.
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2020-10-31 10:21:13 -04:00 |
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Thomas Harte
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1ae2f6f449
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PHD and PLD should always be 16-bit; PLP 8-bit.
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2020-10-31 09:22:35 -04:00 |
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Thomas Harte
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88e26b42f5
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Fixed: PHP pushes only 8 bits regardless of mode.
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2020-10-30 22:36:00 -04:00 |
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Thomas Harte
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7f3f6c339f
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Corrects stacked program bank during native-mode exceptions.
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2020-10-30 20:11:39 -04:00 |
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Thomas Harte
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266022b193
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Fixes PEA.
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2020-10-28 22:00:28 -04:00 |
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Thomas Harte
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1df2ce513a
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Ensures that reset doesn't push to the stack.
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2020-10-28 21:23:35 -04:00 |
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Thomas Harte
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1e4679ae14
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Corrects JSL and RTL.
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2020-10-28 17:25:40 -04:00 |
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Thomas Harte
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b3ab9fff9b
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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.
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2020-10-19 19:27:16 -04:00 |
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Thomas Harte
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14718b93a4
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Improve commentary.
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2020-10-19 09:32:50 -04:00 |
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