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10,237 Commits 8 Branches 121 Tags 496 MiB
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178 Commits

Author SHA1 Message Date
Thomas Harte
28c79b2885 Eliminate redundant [space][tab] pairs. 2023-05-12 14:14:45 -04:00
Thomas Harte
f6acee18cc Eliminate type-in-function-name from 6502-world. 2023-05-10 18:53:38 -05:00
Thomas Harte
2b56b7be0d Simplify namespace syntax. 2023-05-10 16:02:18 -05:00
Thomas Harte
ed2d4ebb0c Fix test (and commentary) for shortened emulated branches. 2023-04-15 23:30:30 -04:00
Thomas Harte
107cb18df4 Fix perceives S in emulated stack-relative mode. 2023-04-14 00:04:44 -04:00
Thomas Harte
98d3da62b5 Apply E mode wrap for d,x and d,y only when DL = 0. 2022-09-09 16:02:35 -04:00
Thomas Harte
45dc99fb9d Further improve exposition. 2022-09-09 15:48:25 -04:00
Thomas Harte
4ddbf095f3 Fully banish flush from the processors. 2022-07-12 10:49:53 -04:00
Thomas Harte
c2938a4f63 Avoid potential classic macro error with address. 2022-06-29 15:09:52 -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
069a057a94 Resolve assumption of arithmetic shifts. 2022-06-24 07:26:07 -04:00
Thomas Harte
4ed3b21bf3 Decimal SBC tweak: negative partial results don't cause carry. 2022-06-23 21:58:09 -04:00
Thomas Harte
a23b0f5122 Map STA (d), y to correct calculator. 2022-06-23 20:57:47 -04:00
Thomas Harte
da552abf75 Fix BIT overflow flag. 2022-06-23 15:24:51 -04:00
Thomas Harte
380b5141fb Be overt about conversion wanted here. 2022-06-23 13:03:26 -04:00
Thomas Harte
66775b2c4e Always consume a second cycle in 16-bit mode. 2022-06-23 12:46:51 -04:00
Thomas Harte
2c12a7d968 Make absolutely sure there's no address bit 24. 2022-06-23 12:12:02 -04:00
Thomas Harte
5a97c09238 Flip internal presumption on the BRK flag. 2022-06-23 11:23:00 -04:00
Thomas Harte
3112376943 Don't include DBR in direct indexed indirect. 2022-06-23 11:03:37 -04:00
Thomas Harte
ecfd17a259 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.
 2022-06-22 15:55:34 -04:00
Thomas Harte
a72dd96dc6 Page boundary crossing is free outside of emulation mode. 2022-06-22 15:31:30 -04:00
Thomas Harte
944e5ebbfa Take another run at IO addresses. 2022-06-22 15:28:11 -04:00
Thomas Harte
76767110b7 Fix overflow for 8-bit calculations; essentially a revert for ADC. 2022-06-22 15:18:47 -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
586ef4810b Add restart_operation_fetch, to aid with testing. 2022-06-18 16:25:57 -04:00
Thomas Harte
8a18685902 Relocated RegisterSizes to Numeric. 2022-04-28 15:10:08 -04:00
Thomas Harte
51d98ef9ab Add missing stddef header where size_t is used. 2021-07-01 23:15:32 -04:00
Thomas Harte
c8471eb993 Adds various asserts, some comments. 2021-03-03 20:47:45 -05:00
Thomas Harte
83d0cfc24e Improves commentary. 2021-03-03 20:33:28 -05:00
Thomas Harte
f6466fd657 Remove temporary hackery. 2021-02-19 22:47:50 -05:00
Thomas Harte
72d7901c88 Takes a shot at the keyboard data full flag. 
Just a guess. But likely?
 2021-02-19 20:06:12 -05:00
Thomas Harte
992ee6d631 Don't zero out the program bank until after it has headed stackward. 2021-02-17 22:08:08 -05:00
Thomas Harte
3c887aff95 Improves consistency. 2021-01-21 18:58:22 -05:00
Thomas Harte
e0b36c9c3d Corrects PBR/DBR resetting upon an exception. 2020-12-29 15:27:49 -05:00
Thomas Harte
574a37814c Attempts to fix exception selection and timing. 2020-12-08 18:46:30 -05:00
Thomas Harte
c72bdd776e Adds a new assert: I think this is the issue getting into GS/OS. 2020-12-07 22:43:24 -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
8ace258fbc Tackles outstanding GCC warnings. 2020-11-22 21:43:56 -05:00
Thomas Harte
cdacf280e1 After much extra logging, corrects destination bank for MVN and MVP. 2020-11-15 16:08:29 -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
d50b059a17 Imports 6502-esque test for decimal SBC overflow. 
All applicable krom tests now pass.
 2020-11-03 20:37:30 -05:00
Thomas Harte
cc5ec78156 Provides something on WAI/STP; sizes STY by the x flag; disables MSC test. 2020-11-03 20:17:44 -05:00
Thomas Harte
5cbb91f352 Fixes COP vector, ensures WDM skips a byte. 2020-11-03 20:01:02 -05:00
Thomas Harte
91ea2eff4c Corrects MVN/MVP off-by-one and failure to store what was read. 2020-11-03 18:29:35 -05:00
Thomas Harte
bf85d71674 Brings ADC into conformance. Fixes JML. 2020-11-03 18:12:10 -05:00
Thomas Harte
3889646d6b Takes a swing at incorporating krom's 65816 test suite. At least as far as ADC. 2020-11-02 21:09:32 -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