Thomas Harte
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87317f5673
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Improve documentation, pin down read/write times.
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2021-04-01 12:38:58 -04:00 |
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Thomas Harte
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687c05365e
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Flushes before set_last_contended_area_access.
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2021-03-31 22:52:41 -04:00 |
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Thomas Harte
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4f80523828
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Tweaks contended timing.
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2021-03-31 22:51:20 -04:00 |
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Thomas Harte
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acdbd88b9e
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Merge pull request #896 from TomHarte/FastLoadUponInsert
Ensure CPC and Spectrum update fast-tape flag upon media insertion.
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2021-03-28 11:44:01 -04:00 |
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Thomas Harte
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729edeac6c
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Ensure CPC and Spectrum update fast-tape flag upon media insertion.
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2021-03-27 18:08:46 -04:00 |
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Thomas Harte
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8a11a5832c
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Uses GI::AY38910::Utility far and wide.
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2021-03-26 23:19:47 -04:00 |
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Thomas Harte
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465ecc4a78
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Attempts to implement proper floating bus behaviour.
As per http://sky.relative-path.com/zx/floating_bus.html
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2021-03-24 20:23:33 -04:00 |
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Thomas Harte
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03ef81b07c
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Attempts to reduce initial bounce.
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2021-03-23 17:12:00 -04:00 |
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Thomas Harte
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0ac11fc39e
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Add floating bus.
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2021-03-23 17:09:42 -04:00 |
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Thomas Harte
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3d0503a35e
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Adds a genuine Spectrum mapping, tweaks timing.
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2021-03-23 16:59:43 -04:00 |
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Thomas Harte
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ad8cb52f11
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Improves const correctness.
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2021-03-23 16:59:26 -04:00 |
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Thomas Harte
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496a294c71
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Adds clocking observers for the tape and FDC.
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2021-03-23 16:38:04 -04:00 |
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Thomas Harte
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465c74ab86
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Adds the Spectrum side of typing.
The character mapper itself needs some Spectrum logic.
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2021-03-23 10:44:43 -04:00 |
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Thomas Harte
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4e8f82a39c
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Adds ZX Spectrum activity indicators.
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2021-03-23 10:32:22 -04:00 |
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Thomas Harte
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d0776b58cf
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Tweaks timing empirically.
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2021-03-22 23:20:49 -04:00 |
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Thomas Harte
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6da099d7e1
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Ensures the enter key is cleared before fast-loading tapes have loaded.
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2021-03-22 22:42:10 -04:00 |
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Thomas Harte
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60e77785e8
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Makes an attempt to provide the necessary hook for floating bus behaviour.
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2021-03-22 22:34:28 -04:00 |
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Thomas Harte
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19cd6a55d3
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Rejigs the way video is counted to orient it around fetch times.
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2021-03-22 22:18:38 -04:00 |
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Thomas Harte
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08432dd94b
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Adds automatic media starts.
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2021-03-22 20:12:03 -04:00 |
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Thomas Harte
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3c1131a84b
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Attempts to implement the +3.
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2021-03-22 19:36:05 -04:00 |
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Thomas Harte
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c0abdf1b86
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Factors out the CPC's simple FDC adaptor.
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2021-03-22 19:12:10 -04:00 |
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Thomas Harte
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3ef2715eee
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Implements the ROM version of fast loading.
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2021-03-22 19:04:38 -04:00 |
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Thomas Harte
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4a12d7086d
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Makes another guess at total colour phase.
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2021-03-22 17:24:38 -04:00 |
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Thomas Harte
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a6b75b8637
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Attempts improvements to video fetch timing. Alas, a lot of guess work here.
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2021-03-22 15:59:03 -04:00 |
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Thomas Harte
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bdb3bce8d6
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Corrects semantics on contended-timing calculation.
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2021-03-22 15:48:51 -04:00 |
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Thomas Harte
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a26716919c
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Switches to an is-in-video test that allows for video memory being paged twice.
This is trivially possible even in plain 128kb mode.
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2021-03-22 15:46:02 -04:00 |
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Thomas Harte
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8dbc7649aa
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Adds note-to-self re: FDC.
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2021-03-22 09:15:00 -04:00 |
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Thomas Harte
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42a9dc7c2b
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Minimises video flushing, moves it to the proper time.
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2021-03-22 09:02:49 -04:00 |
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Thomas Harte
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7965772745
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Moves contention delays up to the time of MREQ going active.
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2021-03-21 23:04:20 -04:00 |
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Thomas Harte
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f37f89a7d3
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Merge branch 'master' into ZXSpectrum
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2021-03-21 22:44:37 -04:00 |
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Thomas Harte
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d987e5a9d7
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Merge pull request #887 from TomHarte/ZX80Wait
Ensures no signalling to wait by a ZX80, ever.
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2021-03-21 22:44:11 -04:00 |
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Thomas Harte
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c097ed348a
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Ensures no signalling to wait by a ZX80, ever.
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2021-03-21 22:38:50 -04:00 |
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Thomas Harte
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0f9ab53ea0
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Resolves GCC warnings from dangling Apple IIgs work.
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2021-03-21 22:36:18 -04:00 |
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Thomas Harte
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dd7419282d
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Resolves GCC warnings from dangling Apple IIgs work.
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2021-03-21 22:25:14 -04:00 |
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Thomas Harte
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7562917740
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Adds the Spectrum to the macOS New... menu.
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2021-03-21 21:50:50 -04:00 |
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Thomas Harte
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3925eee575
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Attempts more relaxed decoding of AY accesses.
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2021-03-21 21:03:35 -04:00 |
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Thomas Harte
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6482303063
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Reduces code duplication slightly.
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2021-03-21 20:34:58 -04:00 |
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Thomas Harte
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9ce1dbaebb
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Switches to partial decoding for paging registers; permits video address changes after paging is locked.
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2021-03-21 20:23:00 -04:00 |
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Thomas Harte
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064667c0c3
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Corrects asymmetrical flash, ensures consistent burst phase.
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2021-03-21 20:22:27 -04:00 |
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Thomas Harte
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58be770eaa
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Factors out some boilerplate.
When I'm confident this is correct, I can fix up the other call sites.
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2021-03-21 00:14:48 -04:00 |
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Thomas Harte
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1b0f45649e
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Improves contended timing.
Still not quite on the money, but this was an overt bug.
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2021-03-21 00:00:18 -04:00 |
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Thomas Harte
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42bfabbe8c
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The implication seems to be of a fixed phase swing.
I'm enquiring further.
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2021-03-20 23:46:13 -04:00 |
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Thomas Harte
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07a63d62dd
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Adds some quick arithmetic on the clock speed.
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2021-03-20 11:19:44 -04:00 |
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Thomas Harte
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26911a16e8
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Lengthens sync, better to conform to PAL; experiments with fixed-phase colour burst.
I need to get hold of real documentation here.
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2021-03-20 10:38:21 -04:00 |
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Thomas Harte
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cf9a5d595b
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Completes piping of audio.
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2021-03-19 23:33:46 -04:00 |
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Thomas Harte
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7729f1f3d0
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Attempts automatic Spectrum tape control.
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2021-03-19 22:43:48 -04:00 |
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Thomas Harte
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7d59ff6d8f
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Builds in a colour burst, producing colour composite.
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2021-03-19 22:25:37 -04:00 |
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Thomas Harte
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2ee478b4c4
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Goes some way towards wiring up Spectrum options.
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2021-03-19 22:17:20 -04:00 |
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Thomas Harte
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bb0d35e3d0
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Minor formatting/layout fixes.
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2021-03-19 22:17:03 -04:00 |
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Thomas Harte
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a482ce1546
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Adds a tape player.
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2021-03-19 11:12:50 -04:00 |
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