3091 Commits

Author	SHA1	Message	Date
Thomas Harte	8af173c4bc	Remove hopeful hit.	2023-11-16 15:48:27 -05:00
Thomas Harte	e1541543c3	Play hit and hope.	2023-11-16 15:40:47 -05:00
Thomas Harte	99e7de5a8b	Colocate memory.	2023-11-16 15:24:35 -05:00
Thomas Harte	095359017f	Log first unhandled port.	2023-11-16 13:02:35 -05:00
Thomas Harte	25f0a373f3	Don't sign-extend ports (!).	2023-11-16 11:17:12 -05:00
Thomas Harte	832e31f7e5	Add note to self.	2023-11-16 10:34:24 -05:00
Thomas Harte	164a7fe848	Log port IO.	2023-11-16 06:48:24 -05:00
Thomas Harte	62b6219763	Install BIOS, albeit in writeable storage.	2023-11-15 22:02:53 -05:00
Thomas Harte	2bc9dfbef9	Albeit with no BIOS present, execute.	2023-11-15 16:10:37 -05:00
Thomas Harte	3b84299a05	Edge closer to PCCompatible doing _something_.	2023-11-15 15:58:49 -05:00
Thomas Harte	6f48ffba16	Add enough of a ScanProducer to run.	2023-11-15 14:30:30 -05:00
Thomas Harte	1a3b2b0620	Add necessary wiring for File -> New...	2023-11-15 14:27:04 -05:00
Thomas Harte	af7069ac21	Include and fetch a BIOS.	2023-11-15 11:32:23 -05:00
Thomas Harte	e927fd00d8	Do just enough to include x86 code in the main build.	2023-11-15 11:01:28 -05:00
Ryan Carsten Schmidt	234292f163	Fix Apple II/II+/IIe first eight non-hbl vbl bytes ... Closes #1196	2023-11-13 00:51:34 -06:00
Ryan Schmidt	18ed36d090	Update get_last_read_value source documentation	2023-10-25 03:25:52 -05:00
Ryan Schmidt	c206c7e2cb	Fix Apple II/II+ text/lores hbl read addresses ... Closes #1181	2023-10-25 03:25:48 -05:00
Ryan Schmidt	98730f1f90	Fix Apple II/II+/IIe first hbl byte read addresses ... Closes #1180	2023-10-25 03:21:22 -05:00
Ryan Schmidt	c272632b5a	Fix Apple II/II+/IIe hbl row < 64 read addresses ... See #1180	2023-10-25 03:21:17 -05:00
Ryan Schmidt	577b01e80b	Fix Apple II/II+/IIe vbl rows read addresses ... See #1180	2023-10-25 03:21:06 -05:00
Thomas Harte	8efb6a9226	Simplify 'get_next_sequence_point' -> 'next_sequence_point'.	2023-09-10 18:00:49 -04:00
Thomas Harte	e5d3140cd1	Avoid flurry of startup events, repeats.	2023-08-22 09:28:57 -04:00
Thomas Harte	79e9de34b6	Flip order of byte usage in double high res mono.	2023-08-21 22:20:42 -04:00
Thomas Harte	2b58f64161	Switch to maximal signalling rate.	2023-08-21 22:12:55 -04:00
Thomas Harte	bb84a5a474	Enable various ADB-controller interrupts.	2023-08-21 15:35:13 -04:00
Thomas Harte	357a324e87	Add exposition.	2023-08-20 15:34:40 -04:00
Thomas Harte	b8e7c2b8ac	Remove printf.	2023-08-20 15:33:30 -04:00
Thomas Harte	3e2a82b638	Add delta capper.	2023-08-20 15:32:48 -04:00
Thomas Harte	1125286b96	Add note to self.	2023-08-20 15:03:28 -04:00
Thomas Harte	17f1f05064	Hit and hope appears to have fixed mouse input.	2023-08-20 15:02:25 -04:00
Thomas Harte	b34403164e	Abstract out VGC interrupt register; fix clearing bug.	2023-08-18 14:30:40 -04:00
Adrian Perez de Castro	1de2631877	Add missing <cstdint> includes for GCC 13 ... Sprinkle includes of the <cstdint> header as needed to make the build succeed with GCC 13, this fixes both with SDL and Qt builds.	2023-05-25 23:06:13 +03:00
Thomas Harte	8578dfbf22	Eliminate various other errant spaces.	2023-05-16 16:40:09 -04:00
Thomas Harte	7f8f1d7e61	Avoid BASIC 2.1 requirement when running 1.1.	2023-05-15 10:17:27 -04:00
Thomas Harte	a1a7c0e253	Apply maybe_unused judiciously.	2023-05-15 10:17:04 -04:00
Thomas Harte	22ac13d3f2	Set proper number of volumes.	2023-05-13 22:29:09 -04:00
Thomas Harte	876fc6d1e0	Eliminate redundant line break.	2023-05-13 22:18:40 -04:00
Thomas Harte	e1d671daf7	Avoid paying for an OPLL if not connected.	2023-05-13 22:16:42 -04:00
Thomas Harte	4989701de9	Install MSX-MUSIC ROM.	2023-05-12 23:50:43 -04:00
Thomas Harte	fed97b8d26	Add MSX-MUSIC entry.	2023-05-12 23:33:28 -04:00
Thomas Harte	e7888497b7	Add an OPLL.	2023-05-12 23:30:03 -04:00
Thomas Harte	0b53c73da8	Add additional consts.	2023-05-12 22:13:55 -04:00
Thomas Harte	a6ebfe2ce2	Add has_msx_music flag.	2023-05-12 22:09:15 -04:00
Thomas Harte	50343dec43	Eliminate all whitespace-only lines.	2023-05-12 14:16:39 -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	10cd2a36cf	Avoid type-in-function-name, Z80 edition.	2023-05-10 18:42:19 -05:00
Thomas Harte	809cd7bca9	Remove the 68000's Mk2 suffix.	2023-05-10 17:13:01 -05:00
Thomas Harte	e56db3c4e5	Eliminate the old 68000 implementation.	2023-05-10 17:06:27 -05:00
Thomas Harte	2b56b7be0d	Simplify namespace syntax.	2023-05-10 16:02:18 -05:00
Thomas Harte	0cb4fec504	Merge pull request #1129 from TomHarte/FarewellCodecvt ... Eliminate use of deprecated codecvt.	2023-04-30 17:21:43 -04:00
Thomas Harte	ec81cdd388	Eliminate codecvt.	2023-04-30 17:17:40 -04:00
Thomas Harte	1f4d526ea5	Permit MSX RAM mapper readback.	2023-04-29 23:48:22 -04:00
Thomas Harte	201a7c17ae	Avoid VDP race condition.	2023-03-12 23:20:48 -04:00
Thomas Harte	9836a108da	Avoid VDP access races.	2023-03-10 21:04:55 -05:00
Thomas Harte	1edf747f9f	Avoid flushes for video output changes.	2023-02-14 20:13:34 -05:00
Thomas Harte	4c93d01fe2	Reduce logging.	2023-01-29 21:30:57 -05:00
Thomas Harte	c9643c4145	Log memory control meaningfully.	2023-01-21 14:13:02 -05:00
Thomas Harte	339086d597	The Yamaha chips have more ports.	2023-01-17 22:29:17 -05:00
Thomas Harte	055e9cdf8d	Differentiate unmapped and mapped-for-handler.	2023-01-16 19:52:40 -05:00
Thomas Harte	a5b9bdc18c	Eliminate speculative apply_mapping.	2023-01-16 11:53:04 -05:00
Thomas Harte	eb51ff5cdf	Add RAM paging.	2023-01-16 11:52:08 -05:00
Thomas Harte	1769c24531	Avoid ambiguous naming.	2023-01-16 11:43:43 -05:00
Thomas Harte	1a58ddaa67	Increase notes for future self.	2023-01-15 23:12:36 -05:00
Thomas Harte	183cb519e7	Give autonomy to secondary slots.	2023-01-15 22:51:17 -05:00
Thomas Harte	68361913ee	Substitute VDP for the MSX 2.	2023-01-14 22:05:59 -05:00
Thomas Harte	1e17fc71ab	Add an RP-5C01 to the MSX 2.	2023-01-14 14:52:07 -05:00
Thomas Harte	18def0c97d	Correct extension ROM visibility.	2023-01-13 22:22:58 -05:00
Thomas Harte	f0a4d1d8ec	Wire up did-page notifications.	2023-01-13 21:54:59 -05:00
Thomas Harte	50b5122969	For an MSX 2, the extension ROM is obligatory.	2023-01-13 14:18:39 -05:00
Thomas Harte	9f450b3ccb	Expose the extension ROM to an MSX 2.	2023-01-13 14:16:12 -05:00
Thomas Harte	4190d25698	Ensure RAM is properly sized and available.	2023-01-13 14:07:54 -05:00
Thomas Harte	befc81743a	Fix base RAM mapping.	2023-01-13 09:31:56 -05:00
Thomas Harte	23ff3fc366	Ensure all routes go somewhere.	2023-01-13 08:05:12 -05:00
Thomas Harte	78ce439b9b	Add missing header; correct type.	2023-01-12 23:08:01 -05:00
Thomas Harte	ce440d52b3	Standardise name.	2023-01-12 23:02:24 -05:00
Thomas Harte	2e7e5ea12b	Fleshes out most of a cleaner memory slot layout.	2023-01-12 23:01:11 -05:00
Thomas Harte	0d8c014099	Secondary slot selections are per primary slot.	2023-01-11 13:15:00 -05:00
Thomas Harte	fee82d3baa	Fix typo.	2023-01-11 13:14:42 -05:00
Thomas Harte	76ad465030	Also seek the extension ROM for the MSX 2.	2023-01-11 12:56:09 -05:00
Thomas Harte	483ee8a74f	Add a catch for the secondary paging register.	2023-01-10 22:24:40 -05:00
Thomas Harte	520ae7f2b2	Pick generic BIOS based on machine type.	2023-01-10 22:15:01 -05:00
Thomas Harte	ae5b81c0ab	Add MSX 2 to the ROM catalogue.	2023-01-10 18:17:17 -05:00
Thomas Harte	6bd261b222	Add storage for secondary paging.	2023-01-10 18:07:31 -05:00
Thomas Harte	53bb17c848	Use model as a compile-time MSX configurator.	2023-01-10 14:55:57 -05:00
Thomas Harte	73549eb38c	Document quite a bit more, to refresh my memory.	2023-01-10 14:40:03 -05:00
Thomas Harte	ef67205ce8	Set pixel count per mode.	2023-01-08 21:31:00 -05:00
Thomas Harte	794adf470b	Break assumption that cycles = pixels; fix pixel clocking.	2023-01-08 21:25:22 -05:00
Thomas Harte	e8aab1fd2a	Restore proper VDP selection.	2022-12-31 21:54:14 -05:00
Thomas Harte	ffb0b2ce0b	Eliminate runtime duplication of personality.	2022-12-31 21:50:57 -05:00
Thomas Harte	7d6eac2895	Template the TMS on its personality. ... Template parameter currently unused, but preparatory to other improvements.	2022-12-31 15:08:33 -05:00
Thomas Harte	ee22a98c17	Add note to future self.	2022-12-27 20:23:25 -05:00
Thomas Harte	28b4f51cb3	Add a SCSI activity indicator.	2022-11-16 11:31:10 -05:00
Thomas Harte	2f78a1c7af	Add SCSI controller inclusion logic.	2022-09-15 12:17:50 -04:00
Thomas Harte	dc35ec8fa0	Merge branch 'master' into AppleIISCSI	2022-09-15 12:05:58 -04:00
Thomas Harte	36c3cb1f70	Deal with pre-ROM03 case, now that it's easy.	2022-09-13 16:31:06 -04:00
Thomas Harte	6773a321c1	Switch to portable direct bitwise logic.	2022-09-13 16:02:49 -04:00
Thomas Harte	ffdf44ad4f	Switch to overt use of std::fill.	2022-09-13 15:39:17 -04:00
Thomas Harte	cbfd8e18e8	Eliminate repetitive magic constants.	2022-09-02 15:54:16 -04:00
Thomas Harte	8dc1aca67c	Add TODO shout-outs.	2022-08-31 21:20:08 -04:00
Thomas Harte	df29a50738	Attempt to support the DMA interface.	2022-08-31 15:33:48 -04:00
Thomas Harte	7996fe6dab	'Clock' the SCSI bus (i.e. make it aware of passing time).	2022-08-30 16:40:25 -04:00
Thomas Harte	4df2a29a1f	Add storage to the bus.	2022-08-24 15:23:50 -04:00
Thomas Harte	6010c971a1	Provide a volume to the SCSI card if one is received.	2022-08-23 15:11:56 -04:00
Thomas Harte	ea4bf5f31a	Provide card's SCSI ID.	2022-08-23 15:05:36 -04:00
Thomas Harte	f4c242d5e9	Attempt to offer centralised C8 region decoding.	2022-08-23 14:50:44 -04:00
Thomas Harte	0595773355	Invents a new virtual select line for extended handling card ROM areas.	2022-08-23 14:41:45 -04:00
Thomas Harte	f89ca84902	Add missing include.	2022-08-22 21:44:33 -04:00
Thomas Harte	246bd5a6ac	Merge branch 'master' into AppleIISCSI	2022-08-22 17:09:57 -04:00
Thomas Harte	3c2d01451a	Remove dead comment.	2022-08-22 17:01:52 -04:00
Thomas Harte	c2c81162a1	Sketch out some of the easy stuff.	2022-08-22 16:48:51 -04:00
Thomas Harte	3d234147a6	Add in collected specs.	2022-08-22 10:22:19 -04:00
Thomas Harte	8e7f53751d	Add Apple II SCSI ROM to the catalogue.	2022-08-21 22:03:52 -04:00
Thomas Harte	bfc77f1606	Add workaround that further isolates whatever bug Spindizzy reveals.	2022-08-19 16:38:42 -04:00
Thomas Harte	a6b8285d9c	Factor out the blitter sequencer.	2022-08-19 16:38:15 -04:00
Thomas Harte	837acdcf60	Experimentally decline immediate blits.	2022-08-16 21:51:13 -04:00
Thomas Harte	7289192130	Fix refresh slots: they're taken, not open.	2022-08-16 21:51:02 -04:00
Thomas Harte	bb54ac14b8	Prove that new output errors are [probably] external to the Blitter.	2022-08-15 11:10:17 -04:00
Thomas Harte	856e3d97bf	Merge branch 'master' into SerialisedBlitter	2022-08-15 10:54:36 -04:00
Thomas Harte	94231ca3e3	Put word-sizing responsibility on the caller.	2022-08-10 16:41:45 -04:00
Thomas Harte	e2a8b26b57	Display properly from greater RAM sizes.	2022-08-10 16:36:11 -04:00
Thomas Harte	6d1c954623	Make ST RAM size selectable, default to 1MB.	2022-08-10 12:00:06 -04:00
Thomas Harte	bdb35b6191	Add an easier hook for debugging.	2022-08-08 21:00:28 -04:00
Thomas Harte	892580c183	Clarify test.	2022-08-08 15:57:36 -04:00
Thomas Harte	d4b7d73fc4	Further reduces lines to one access per slot, max.	2022-08-07 19:19:00 -04:00
Thomas Harte	867769f6e7	Reduces line drawing to two accesses per slot. ... Still a fiction, but a better one.	2022-08-07 19:15:03 -04:00
Thomas Harte	3781b5eb0e	Provide further context.	2022-08-06 14:40:12 -04:00
Thomas Harte	318cea4ccd	Attempt a full bus-transaction comparison.	2022-08-06 10:06:49 -04:00
Thomas Harte	45892f3584	Add optional transaction records to the Blitter.	2022-08-06 09:51:20 -04:00
Thomas Harte	612413cb1c	Remove redundant state.	2022-08-04 10:06:14 -04:00
Thomas Harte	511ec5a736	Apply modulos at end of final line. ... Possibly I need to rethink the sequence logic?	2022-07-30 21:35:26 -04:00
Thomas Harte	4fb9dec381	Fix use of bool.	2022-07-30 21:02:44 -04:00
Thomas Harte	82476bdabe	Avoid 'complete' repetition.	2022-07-30 21:02:04 -04:00
Thomas Harte	58ee8e2460	Minor tidy-up. No fixes.	2022-07-30 21:00:50 -04:00
Thomas Harte	94a90b7a89	Attempt a real slot-by-slot blit.	2022-07-30 20:34:37 -04:00
Thomas Harte	5d992758f8	Ensure blitter with all flags disabled terminates.	2022-07-30 20:13:37 -04:00
Thomas Harte	27b8c29096	Apply modulos at end of line, not beginning.	2022-07-30 10:27:53 -04:00
Thomas Harte	93d2a612ee	Add an explicit flush-pipeline step; some tests now pass.	2022-07-29 16:33:46 -04:00
Thomas Harte	03d4960a03	Begin a full-synchronous usage of the sequencer, at least exposing poor handling of the pipeline.	2022-07-29 16:15:18 -04:00
Thomas Harte	1ac0a4e924	Provide a loop count directly from the sequencer. ... This avoids the caller having to take a guess at iterations.	2022-07-29 12:14:59 -04:00
Thomas Harte	d85d70a133	Add documentation, formal begin function.	2022-07-26 22:01:43 -04:00
Thomas Harte	2c95dea4db	Introduce putative blitter sequencer.	2022-07-26 17:05:05 -04:00
Thomas Harte	804c12034c	Apply blitter priority bit.	2022-07-26 16:07:26 -04:00
Thomas Harte	ce7f57f251	Switch to regular integer types for flags.	2022-07-26 09:22:05 -04:00
Thomas Harte	426eb0f79b	Add comments, fix playfield sprite masking.	2022-07-22 17:01:38 -04:00
Thomas Harte	6beca141d5	Reinstate assumption of no sprites in vertical blank.	2022-07-21 08:41:50 -04:00
Thomas Harte	f29d305597	Add missing #include.	2022-07-19 21:40:16 -04:00
Thomas Harte	89abf7faeb	Take a guess at reintroducing a special case for end-of-blank.	2022-07-19 21:25:34 -04:00
Thomas Harte	57186c3c14	Don't limit sprite fetch area; add further commentary.	2022-07-19 16:37:13 -04:00
Thomas Harte	feee6afe0f	Improve documentation.	2022-07-19 16:19:19 -04:00
Thomas Harte	cb42ee3ade	Eliminate DMAState; it sounds like VSTOP solves this problem.	2022-07-19 16:11:29 -04:00
Thomas Harte	830704b4a9	Clarify and slightly improve state machine. ... No more using the visible flag to permit a DMA control fetch.	2022-07-19 15:39:57 -04:00
Thomas Harte	8f2e94a1d8	Switch name back to emphasise _async_.	2022-07-16 14:41:04 -04:00
Thomas Harte	76d5e53094	Fix red/blue confusion.	2022-07-15 16:24:07 -04:00
Thomas Harte	f465fe65f4	Merge pull request #1061 from TomHarte/MacintoshPixels ... Microtweak: simplify Macintosh pixel serialisation.	2022-07-14 18:54:10 -04:00
Thomas Harte	bf03bda314	Generalise AsyncTaskQueue, DeferringAsyncTaskQueue and AsyncUpdater into a single template.	2022-07-14 16:39:26 -04:00
Thomas Harte	59da143e6a	Add overt flushes to the SDL target.	2022-07-12 10:57:22 -04:00
Thomas Harte	4e9ae65459	Reintroduce sync matching.	2022-07-12 09:56:13 -04:00
Thomas Harte	6dabdaca45	Switch to int; attempt to do a better job of initial audio filling.	2022-07-09 13:33:46 -04:00
Thomas Harte	b097b1296b	Adopt granular flushing widely.	2022-07-08 16:04:32 -04:00
Thomas Harte	b03d91d5dd	Permit granular specification of what to flush.	2022-07-08 15:38:29 -04:00
Thomas Harte	96189bde4b	Loop the Master System into the experiment.	2022-07-07 16:46:08 -04:00
Thomas Harte	fc0dc4e5e2	Amiga only, temporarily: attempt to reduce audio maintenance costs.	2022-07-07 16:41:49 -04:00
Thomas Harte	7cbee172b2	Merge pull request #1041 from TomHarte/InST ... Switch the Atari ST to the newer 68000.	2022-06-30 17:15:04 -04:00
Thomas Harte	6a2d4ae11d	Merge branch 'master' into InAmiga	2022-06-30 10:12:32 -04:00
Thomas Harte	6da634b79f	Merge branch 'master' into InST	2022-06-30 10:12:23 -04:00
Thomas Harte	924de35cf3	Go all in on support for physical shadowing.	2022-06-29 14:39:56 -04:00
Thomas Harte	7cf9e08948	Map shadowing by logical address, not physical. ... Disclaimer: although this better matches the tests, I've yet to verify.	2022-06-29 06:10:15 -04:00
Thomas Harte	60d3519993	Clarify, attempt to implement as internally documented.	2022-06-28 22:32:31 -04:00
Thomas Harte	6abc317986	Avoid permitting writes in the Cx00 region after uninhibiting the language card.	2022-06-28 16:35:47 -04:00
Thomas Harte	94fcc90886	Use auxiliary switches to control language card area when card is inhibited.	2022-06-28 12:46:31 -04:00
Thomas Harte	7aeaa4a485	Tweak paging semantics, to allow simple multiple dependencies.	2022-06-27 21:38:45 -04:00
Thomas Harte	ef40a81be2	Remove temporary hack.	2022-06-27 08:00:29 -04:00
Thomas Harte	21842052cf	Alternative zero page should affect bank 0's language card area when the card is disabled.	2022-06-27 07:56:45 -04:00
Thomas Harte	56aa182fb6	Fix debug builds.	2022-06-06 15:26:15 -04:00
Thomas Harte	9818c7e78c	Switch the Amiga to the newer 68000.	2022-06-06 11:10:56 -04:00
Thomas Harte	5495f30329	Microtweak: simplify Macintosh pixel serialisation.	2022-06-06 08:34:58 -04:00
Thomas Harte	6aa599a17c	Future-proof perform_bus_operation.	2022-06-06 08:20:16 -04:00
Thomas Harte	57858b2fa5	Merge branch 'master' into InST	2022-06-05 20:59:48 -04:00
Thomas Harte	403eda7024	Add missing flush.	2022-06-05 09:08:36 -04:00
Thomas Harte	1671827d24	Add flush.	2022-06-05 09:07:43 -04:00
Thomas Harte	4a740fbd14	Switch Atari ST to using the new 68000.	2022-06-04 08:43:43 -04:00
Thomas Harte	a61f7e38b6	Very minor: avoid division and modulus when unnecessary.	2022-06-03 15:39:29 -04:00
Thomas Harte	3d059cb751	Make use of Microcycle helpers where relevant. ... None of these existed when the Macintosh was first added to this emulator.	2022-06-03 15:33:31 -04:00
Thomas Harte	1365fca161	Avoid phoney write modifies.	2022-05-27 21:42:55 -04:00
Thomas Harte	a611a745e7	Switch the Macintosh to 68000 mk2.	2022-05-24 12:35:36 -04:00
Thomas Harte	b0518040b5	Plants the seek of a 68000 mark 2.	2022-05-16 11:44:16 -04:00
Thomas Harte	866b6c6129	Eliminate off_t.	2022-04-27 19:16:37 -04:00
Thomas Harte	efff91ea3d	Undo bad guess at initial switch state.	2022-04-17 17:03:05 -04:00
Thomas Harte	290dd3993b	CPC: ensure 64/128k RAM is properly selected.	2022-03-26 08:54:07 -04:00
Thomas Harte	bfd28a04ba	Remove noise.	2022-03-18 10:41:20 -04:00
Thomas Harte	359ec257c0	Add a further state, seemingly to fix high-res mode.	2022-03-18 08:27:46 -04:00
Thomas Harte	88767e402c	Switch DDFSTART/STOP state machine.	2022-03-17 20:03:36 -04:00
Thomas Harte	e698cbf092	Silence debugging information.	2022-03-13 12:48:05 -04:00
Thomas Harte	f2ce646d8d	Undo 8-cycle-if-met WAIT.	2022-03-13 12:47:48 -04:00
Thomas Harte	acba357df6	Adds empty callouts for all serial port registers.	2021-12-23 15:22:20 -05:00
Thomas Harte	a17c192a9e	Allow chip RAM size selection, while I'm here.	2021-12-22 15:30:19 -05:00
Thomas Harte	1916a9b99c	Remove stdout noise.	2021-12-22 15:22:28 -05:00
Thomas Harte	9796b308dc	Add basic implementation of fast RAM.	2021-12-22 15:17:11 -05:00
Thomas Harte	d0e3024bec	Switch to nibble-oriented lookup tables for fill mode.	2021-12-19 17:16:46 -05:00