966 Commits

Author	SHA1	Message	Date
Thomas Harte	fd70f7ad43	Attempts to make pixel content observeable.	2021-09-08 20:57:26 -04:00
Thomas Harte	5cc25d0846	Adds a further sanity assert.	2021-08-08 21:52:52 -04:00
Thomas Harte	e402e690b0	Assume and test that divide-by-zero posts the PC of the offending instruction.	2021-08-07 17:51:00 -04:00
Thomas Harte	dcbc9847a3	Attempts to get E synchronisation correct.	2021-08-05 20:08:34 -04:00
Thomas Harte	60b09d9bb0	Increases compile-time logging options.	2021-08-01 21:22:33 -04:00
Thomas Harte	f576baf214	I'm not yet sure this is the best approach, but starts trying to make use of Lorenz's 6526 tests.	2021-07-30 21:21:16 -04:00
Thomas Harte	8d2d4c850f	Revoke temporary debugging.	2021-07-25 19:59:10 -04:00
Thomas Harte	b7bed027d7	Ensures the value initially loaded to A7 is aligned. ... This is a bit of a guess; it's likely to be true though per the rule that A7 is always kept aligned.	2021-07-25 19:55:23 -04:00
Thomas Harte	956a6dbd64	Improve commentary.	2021-07-23 19:23:54 -04:00
Thomas Harte	68fe19818e	Expose more information about the E clock state.	2021-07-23 19:22:00 -04:00
Thomas Harte	69d62560b4	Adds comment to avoid potential future error.	2021-07-22 22:00:33 -04:00
Thomas Harte	26f4758523	Makes a further accommodation for PermitRead/Write.	2021-07-22 21:11:25 -04:00
Thomas Harte	5401744dc0	Add additional asserts.	2021-07-21 21:47:44 -04:00
Thomas Harte	fe10a10ac2	Correct address on stack upon priviliege exception.	2021-07-21 21:46:55 -04:00
Thomas Harte	b2ae8e7a4a	Adds a type for the operation bitfield.	2021-07-18 20:54:54 -04:00
Thomas Harte	50b9d0e86d	Logically, I think this should be unsigned.	2021-07-18 20:25:22 -04:00
Thomas Harte	0cfc7f732c	Extends to support read/write permissions in apply.	2021-07-17 21:09:52 -04:00
Thomas Harte	51d98ef9ab	Add missing stddef header where size_t is used.	2021-07-01 23:15:32 -04:00
Thomas Harte	bdcab447f9	Add a further accessor.	2021-06-27 16:27:26 -04:00
Thomas Harte	d80f03e369	Corrects longstanding deviation from naming convention.	2021-04-25 14:11:36 -04:00
Thomas Harte	e7a9ae18a1	Introduce further default state.	2021-04-24 23:18:00 -04:00
Thomas Harte	77fcf52d27	Purely style: remove some redundant nullptrs.	2021-04-19 18:53:00 -04:00
Thomas Harte	79c2bc1fd7	Put the program counter on the bus during interrupt acknowledge.	2021-04-19 18:43:50 -04:00
Thomas Harte	7017324d60	r_step is obsolete now that I know that [DD/FD]CB don't have a refresh cycle.	2021-04-13 22:17:30 -04:00
Thomas Harte	deb5d69ac7	Consolidates macros.	2021-04-13 22:11:28 -04:00
Thomas Harte	5998f3b35b	Corrects LD[I/D/IR/DR] timing. ... Macro cleanup to come.	2021-04-13 20:00:18 -04:00
Thomas Harte	869567fdd9	Corrects EX (SP), HL breakdown.	2021-04-13 19:45:48 -04:00
Thomas Harte	b42780173a	Establishes that there really is no Read4 and Read4Pre distinction. ... Will finish these unit tests, then clean up.	2021-04-12 20:54:10 -04:00
Thomas Harte	947de2d54a	Switches five-cycle read to a post hoc pause.	2021-04-12 17:17:08 -04:00
Thomas Harte	e82367def3	Switches to test-conformant behaviour for (IX/IY+n) opcode fetches.	2021-04-11 23:01:00 -04:00
Thomas Harte	9cde7c12ba	Shifts responsibility for refresh into the fetch-decode-execute sequence.	2021-04-11 22:50:24 -04:00
Thomas Harte	015556cc91	Switch (ii+n) to Read4Pre.	2021-04-11 10:26:14 -04:00
Thomas Harte	b397059d5e	Moves read time in Read4Pre.	2021-04-10 17:54:20 -04:00
Thomas Harte	e0736435f8	Makes assumption that the address bus just holds its value during an internal operation.	2021-04-10 12:00:53 -04:00
Thomas Harte	eacffa49f5	Exposes IR during 'internal' operations.	2021-04-08 22:22:26 -04:00
Thomas Harte	29cf80339a	Corrects too-short buffer.	2021-04-08 22:15:03 -04:00
Thomas Harte	57a7e0834f	Corrects sampling of MREQ.	2021-04-08 19:21:35 -04:00
Thomas Harte	25b8c4c062	Provide clearer failure case.	2021-04-03 21:04:44 -04:00
Thomas Harte	1be88a5308	Remove first draft.	2021-04-02 07:39:22 -04:00
Thomas Harte	294280a94e	Spells out everything except interrupt acknowledge.	2021-04-02 07:38:06 -04:00
Thomas Harte	32aebfebe0	Starts spelling out meaning of the Z80's partial machine cycles.	2021-04-02 07:37:56 -04:00
Thomas Harte	76299a2add	Include AF' in Z80 state.	2021-03-29 22:58:52 -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