Thomas Harte
|
bdb3bce8d6
|
Corrects semantics on contended-timing calculation.
|
2021-03-22 15:48:51 -04:00 |
|
Thomas Harte
|
a26716919c
|
Switches to an is-in-video test that allows for video memory being paged twice.
This is trivially possible even in plain 128kb mode.
|
2021-03-22 15:46:02 -04:00 |
|
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 |
|