191 Commits

Author	SHA1	Message	Date
Thomas Harte	c0eb401d04	Add a between-instructions enforcement of SH = 1.	2023-08-05 14:57:43 -04:00
Thomas Harte	2262725010	Reveal 16-bit stack pointer when asked, regardless of mode.	2023-07-31 17:08:02 -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	3a02c22072	Provide an always-16bit-address route to the stack.	2023-07-30 16:25:51 -04:00
Thomas Harte	0f1468adfd	Correct wrapping behaviour for (d, x).	2023-07-28 13:39:21 -04:00
Thomas Harte	e9347168e6	Don't alter the data bank upon BRK, COP, IRQ, etc.	2023-07-28 10:53:02 -04:00
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