39 Commits

Author	SHA1	Message	Date
Thomas Harte	8dbc7649aa	Adds note-to-self re: FDC.	2021-03-22 09:15:00 -04:00
Thomas Harte	42a9dc7c2b	Minimises video flushing, moves it to the proper time.	2021-03-22 09:02:49 -04:00
Thomas Harte	7965772745	Moves contention delays up to the time of MREQ going active.	2021-03-21 23:04:20 -04:00
Thomas Harte	7562917740	Adds the Spectrum to the macOS New... menu.	2021-03-21 21:50:50 -04:00
Thomas Harte	3925eee575	Attempts more relaxed decoding of AY accesses.	2021-03-21 21:03:35 -04:00
Thomas Harte	6482303063	Reduces code duplication slightly.	2021-03-21 20:34:58 -04:00
Thomas Harte	9ce1dbaebb	Switches to partial decoding for paging registers; permits video address changes after paging is locked.	2021-03-21 20:23:00 -04:00
Thomas Harte	064667c0c3	Corrects asymmetrical flash, ensures consistent burst phase.	2021-03-21 20:22:27 -04:00
Thomas Harte	58be770eaa	Factors out some boilerplate. ... When I'm confident this is correct, I can fix up the other call sites.	2021-03-21 00:14:48 -04:00
Thomas Harte	1b0f45649e	Improves contended timing. ... Still not quite on the money, but this was an overt bug.	2021-03-21 00:00:18 -04:00
Thomas Harte	42bfabbe8c	The implication seems to be of a fixed phase swing. ... I'm enquiring further.	2021-03-20 23:46:13 -04:00
Thomas Harte	07a63d62dd	Adds some quick arithmetic on the clock speed.	2021-03-20 11:19:44 -04:00
Thomas Harte	26911a16e8	Lengthens sync, better to conform to PAL; experiments with fixed-phase colour burst. ... I need to get hold of real documentation here.	2021-03-20 10:38:21 -04:00
Thomas Harte	cf9a5d595b	Completes piping of audio.	2021-03-19 23:33:46 -04:00
Thomas Harte	7729f1f3d0	Attempts automatic Spectrum tape control.	2021-03-19 22:43:48 -04:00
Thomas Harte	7d59ff6d8f	Builds in a colour burst, producing colour composite.	2021-03-19 22:25:37 -04:00
Thomas Harte	2ee478b4c4	Goes some way towards wiring up Spectrum options.	2021-03-19 22:17:20 -04:00
Thomas Harte	a482ce1546	Adds a tape player.	2021-03-19 11:12:50 -04:00
Thomas Harte	2371048ad1	Formally separates keyboard code. ... With an eye to formalising the Spectrum/ZX81/ZX80 differences.	2021-03-19 10:36:08 -04:00
Thomas Harte	93b9ea67e6	Takes a run at contended timings.	2021-03-19 08:49:56 -04:00
Thomas Harte	87fac15cc4	This is going to remain purely a template; no .cpp.	2021-03-18 23:51:45 -04:00
Thomas Harte	2d51924a3c	Wires up Spectrum keyboard. ... The machine now appears to be fully interactive and functional. Timing and media aside, that is.	2021-03-18 23:51:21 -04:00
Thomas Harte	44240773ef	Corrects address generation, ink/paper selection. ... Seemingly to give a correct +2a boot. Time to add a keyboard and find out, I guess.	2021-03-18 23:30:48 -04:00
Thomas Harte	ed587a4db5	Provides a better no-port-here value.	2021-03-18 23:14:39 -04:00
Thomas Harte	020a04006e	Adds flashing, randomises initial RAM contents.	2021-03-18 23:07:51 -04:00
Thomas Harte	622a8abf7f	Takes a stab at pixel output.	2021-03-18 22:57:10 -04:00
Thomas Harte	871bac6c8a	Marks out and approximately centres a pixel region.	2021-03-18 22:41:20 -04:00
Thomas Harte	fe3e8f87e7	Takes a shot at an all-border output.	2021-03-18 22:29:24 -04:00
Thomas Harte	87fc7c02e8	Provides a base pointer for video output.	2021-03-18 22:04:41 -04:00
Thomas Harte	f2620e6afb	Adds a CRT. Not yet clocked.	2021-03-18 21:54:42 -04:00
Thomas Harte	ab2ad70885	Takes a run at interrupts.	2021-03-18 21:29:52 -04:00
Thomas Harte	135134acfd	Adds a shell for video emulation.	2021-03-18 12:47:48 -04:00
Thomas Harte	5664e81d48	It appears the +2a and +3 have a different clock rate.	2021-03-18 12:41:24 -04:00
Thomas Harte	b830d62850	Adds quick notes on port FE.	2021-03-18 12:32:54 -04:00
Thomas Harte	17f551e89d	Attempts a full audio wiring.	2021-03-18 12:23:54 -04:00
Thomas Harte	4a4da90d56	Implements some of the memory map, and instantiates audio objects.	2021-03-18 12:14:48 -04:00
Thomas Harte	730bfcd1fd	Stumbles towards a memory map.	2021-03-18 10:43:51 -04:00
Thomas Harte	97249b0edd	Slow walks further towards a functioning Spectrum.	2021-03-18 10:18:17 -04:00
Thomas Harte	5a1bda1d82	Performs boilerplate towards a ZX Spectrum class.	2021-03-17 23:38:55 -04:00