97 Commits

Author	SHA1	Message	Date
Thomas Harte	477979c275	Fully formulate and document the flow controller.	2022-05-10 10:34:07 -04:00
Thomas Harte	c635720a09	Tidy up; provide a notification for bit-change operations.	2022-05-10 08:23:25 -04:00
Thomas Harte	f2a6a12f79	Remove further vestiges of timing.	2022-05-09 20:58:51 -04:00
Thomas Harte	7445c617bc	Start removing 68000-specific timing calculations.	2022-05-09 20:32:02 -04:00
Thomas Harte	8e7340860e	Minor thematic rearrangement.	2022-05-09 16:35:17 -04:00
Thomas Harte	2ca1eb4cf8	Move set_pc into the operation-specific group.	2022-05-09 16:20:15 -04:00
Thomas Harte	0af8660181	Remove add_pc and decline_branch in favour of operation-specific signals.	2022-05-09 16:19:25 -04:00
Thomas Harte	2f7cff84d9	Enable missing rotates and shifts.	2022-05-09 11:26:01 -04:00
Thomas Harte	8e5650fde9	Clean up Instruction.hpp.	2022-05-09 10:13:42 -04:00
Thomas Harte	539932dc56	Provide function codes. TODO: optionally.	2022-05-09 09:18:02 -04:00
Thomas Harte	e35de357fa	Route reads and writes through a common path.	2022-05-08 17:17:46 -04:00
Thomas Harte	0818fd7828	Ensure no status updates fall through the cracks.	2022-05-07 21:29:12 -04:00
Thomas Harte	98cb9cc1eb	Fix CHK operand size.	2022-05-07 21:16:44 -04:00
Thomas Harte	bf8c97abbb	Permit TRAP, TRAPV and CHK to push the next PC rather than the current.	2022-05-07 20:32:39 -04:00
Thomas Harte	ad6cf5e401	Pull out magic constant, simplify sp and TAS.	2022-05-07 20:20:24 -04:00
Thomas Harte	2b3900fd14	Fix LINK A7.	2022-05-07 08:15:26 -04:00
Thomas Harte	1defeca1ad	Implement RTS, RTR, RTE.	2022-05-06 12:30:49 -04:00
Thomas Harte	ac6a9ab631	Fix TAS Dn.	2022-05-06 12:23:04 -04:00
Thomas Harte	8176bb6f79	Expose issues with TST and TAS.	2022-05-06 12:18:56 -04:00
Thomas Harte	9c266d4316	Proceed to unimplemented TST.	2022-05-06 11:33:57 -04:00
Thomas Harte	190a351a29	Fix address writeback.	2022-05-06 09:56:01 -04:00
Thomas Harte	607ddd2f78	Preserve MOVEM order in Operation.	2022-05-06 09:45:06 -04:00
Thomas Harte	fed79a116f	Be overt about the size being described here.	2022-05-06 09:22:38 -04:00
Thomas Harte	5db0ea0236	Add note for my tomorrow self.	2022-05-05 21:11:02 -04:00
Thomas Harte	06fe320cc0	Correct source counting, but this leaves the operands still being the wrong way around.	2022-05-05 21:06:53 -04:00
Thomas Harte	f7991e18de	Makes a failed attempt to implement MOVEM to registers.	2022-05-05 20:32:21 -04:00
Thomas Harte	d7d0a5c15e	Implement MOVEM to memory.	2022-05-05 18:51:29 -04:00
Thomas Harte	47f4bbeec6	Switch to a contiguous block of 16 registers.	2022-05-05 15:31:59 -04:00
Thomas Harte	9ab70b340c	Route MOVEM appropriately.	2022-05-05 12:42:57 -04:00
Thomas Harte	70cdc2ca9f	Fix MOVEP to register. ... Advance to lack of MOVEM.	2022-05-05 12:37:47 -04:00
Thomas Harte	f63a872387	BTST does not write back.	2022-05-05 12:32:15 -04:00
Thomas Harte	67462c2f92	Rewire MOVEP.	2022-05-05 12:27:36 -04:00
Thomas Harte	4a4e786060	Hit a realisation: write-back isn't going to work with MOVEP as formulated.	2022-05-05 09:26:26 -04:00
Thomas Harte	665f2d4c00	Attempts MOVEP.	2022-05-05 09:00:33 -04:00
Thomas Harte	64586ca7ba	Implement BTST/etc.	2022-05-04 20:57:22 -04:00
Thomas Harte	15c90e546f	Fix rotates and shifts to memory.	2022-05-04 19:44:59 -04:00
Thomas Harte	5aabe01b6d	Mostly fix LINK and UNLK.	2022-05-04 08:41:55 -04:00
Thomas Harte	5d1d94848c	Take a bash at LINK and UNLK.	2022-05-04 08:26:11 -04:00
Thomas Harte	7d10976e08	Add LINK and UNLINK to operand_flags.	2022-05-03 20:51:02 -04:00
Thomas Harte	d3b55a74a5	Fix LEA, proceed to non-functional LINK and UNLK.	2022-05-03 20:45:36 -04:00
Thomas Harte	de58ec71fd	Fix EXT, SWAP.	2022-05-03 20:17:36 -04:00
Thomas Harte	052ba80fd7	Add enough wiring to complete but fail EXT and JMP/JSR.	2022-05-03 15:49:55 -04:00
Thomas Harte	39f0ec7536	Get far enough through CHK to realise that MOVEM probably needs to be divided by direction.	2022-05-03 15:40:04 -04:00
Thomas Harte	af973138df	Correct decoding of Bcc.b, satisfying Bcc and BSR tests.	2022-05-03 15:32:54 -04:00
Thomas Harte	5a87506f3d	Fix Bcc, making decision that add_pc is relative to start of instruction.	2022-05-03 15:21:42 -04:00
Thomas Harte	90f0005cf2	Proceed to failing Bcc and flagging up my lack of an implementation for BSR.	2022-05-03 14:45:49 -04:00
Thomas Harte	d8b3748d24	Fix Scc size, DBcc behaviour.	2022-05-03 14:40:51 -04:00
Thomas Harte	1b224c961e	Fix Scc, add operand flags for DBcc.	2022-05-03 14:23:57 -04:00
Thomas Harte	b6ffff5bbd	Distinguish [ADD/SUB]QA from [ADD/SUB]Q.	2022-05-03 14:17:26 -04:00
Thomas Harte	b3cf13775b	Consume operand_flags into Instruction.hpp.	2022-05-03 11:09:57 -04:00