Thomas Harte
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7fdb1d848b
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Corrects Spectrum 128kb partial decoding.
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2021-04-16 21:54:52 -04:00 |
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Thomas Harte
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d7954a4cb1
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Tweaks timing a little.
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2021-04-15 21:51:49 -04:00 |
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Thomas Harte
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ef636da866
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Attempts 48/128kb floating bus behaviour.
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2021-04-15 21:19:21 -04:00 |
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Thomas Harte
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fa18b06dbf
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Correct get_floating_value to be consistent in out-of-bounds behaviour.
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2021-04-15 21:13:36 -04:00 |
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Thomas Harte
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349b9ce502
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Don't post contended accesses other than on the +2a/+3.
Those machines have an actual latch for this stuff, the others don't.
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2021-04-15 21:13:06 -04:00 |
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Thomas Harte
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71cf63bd35
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Corrects internal cycle contention.
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2021-04-15 19:17:11 -04:00 |
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Thomas Harte
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d1bb3aada4
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Attempts to complete the in-machine application of contention.
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2021-04-15 18:57:34 -04:00 |
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Thomas Harte
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b4214c6e08
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Blocks off the AY from inputs in 48kb mode.
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2021-04-15 18:04:16 -04:00 |
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Thomas Harte
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f5c7746493
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Extends fast loading support to the just-introduced models.
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2021-04-15 17:31:42 -04:00 |
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Thomas Harte
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f10ec80153
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Gets started on different video timings.
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2021-04-14 22:23:27 -04:00 |
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Thomas Harte
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0af405aa46
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Starts working in the 48kb and 128kb Spectrums.
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2021-04-14 21:37:10 -04:00 |
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Thomas Harte
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60e8273de2
|
Tweaks video timing, again.
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2021-04-06 21:04:54 -04:00 |
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Thomas Harte
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dd28246f9f
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Better indicate interrupt timing.
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2021-04-06 12:06:13 -04:00 |
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Thomas Harte
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fd88071c0a
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Remove further detritus.
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2021-04-05 17:21:26 -04:00 |
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Thomas Harte
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16bfe1a55c
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Resolves use-after-return memory error.
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2021-04-04 22:45:56 -04:00 |
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Thomas Harte
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90c3d6a1e8
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Attempts a later interception of tape loading.
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2021-04-04 22:39:30 -04:00 |
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Thomas Harte
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f26bf4b9e4
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Splitting here isn't achieving anything.
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2021-04-04 19:52:38 -04:00 |
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Thomas Harte
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1da51bee6c
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14368 and six seem to be the proper numbers, per my comprehension of Patrick Rak.
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2021-04-04 19:52:19 -04:00 |
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Thomas Harte
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5a66956221
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Merge branch 'master' into SpeccyTiming
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2021-04-04 19:12:37 -04:00 |
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Thomas Harte
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d77ddaf4fa
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Switches the Electron to JustInTimeActor video.
Also reorders template parameters; I think that specifying a different time base is likely to be more common than using a divider.
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2021-04-04 17:33:49 -04:00 |
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Thomas Harte
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afb4e6d37d
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Merge branch 'master' into JITSleeper
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2021-04-04 15:37:19 -04:00 |
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Thomas Harte
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14663bd06b
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I think 3 is what I'm aiming for here.
But this probably isn't correct for IO cycles.
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2021-04-02 07:36:57 -04:00 |
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Thomas Harte
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044ac949ba
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Rearrange fields.
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2021-04-01 12:44:00 -04:00 |
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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
|
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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faaa4961ed
|
Attempts to rely on JustInTimeActor's built-in ClockingHint::Observer.
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2021-03-26 23:54:08 -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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0ac11fc39e
|
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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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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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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7562917740
|
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
|
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
|
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 |
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Thomas Harte
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1b0f45649e
|
Improves contended timing.
Still not quite on the money, but this was an overt bug.
|
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.
|
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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Thomas Harte
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a35e1f4fbe
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Starts to make formal Spectrum accommodations.
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2021-03-19 11:06:09 -04:00 |
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Thomas Harte
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2371048ad1
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Formally separates keyboard code.
With an eye to formalising the Spectrum/ZX81/ZX80 differences.
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2021-03-19 10:36:08 -04:00 |
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Thomas Harte
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93b9ea67e6
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Takes a run at contended timings.
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2021-03-19 08:49:56 -04:00 |
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Thomas Harte
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f8c9ef2950
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Add necessary header for memset.
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2021-03-19 00:00:59 -04:00 |
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Thomas Harte
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87fac15cc4
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This is going to remain purely a template; no .cpp.
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2021-03-18 23:51:45 -04:00 |
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Thomas Harte
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2d51924a3c
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Wires up Spectrum keyboard.
The machine now appears to be fully interactive and functional. Timing and media aside, that is.
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2021-03-18 23:51:21 -04:00 |
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Thomas Harte
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c3d96b30d7
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Factors out a little of the ZX81's keyboard logic.
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2021-03-18 23:45:57 -04:00 |
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Thomas Harte
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44240773ef
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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 |
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Thomas Harte
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ed587a4db5
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Provides a better no-port-here value.
|
2021-03-18 23:14:39 -04:00 |
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Thomas Harte
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020a04006e
|
Adds flashing, randomises initial RAM contents.
|
2021-03-18 23:07:51 -04:00 |
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Thomas Harte
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622a8abf7f
|
Takes a stab at pixel output.
|
2021-03-18 22:57:10 -04:00 |
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Thomas Harte
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871bac6c8a
|
Marks out and approximately centres a pixel region.
|
2021-03-18 22:41:20 -04:00 |
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Thomas Harte
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fe3e8f87e7
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Takes a shot at an all-border output.
|
2021-03-18 22:29:24 -04:00 |
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Thomas Harte
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87fc7c02e8
|
Provides a base pointer for video output.
|
2021-03-18 22:04:41 -04:00 |
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Thomas Harte
|
f2620e6afb
|
Adds a CRT. Not yet clocked.
|
2021-03-18 21:54:42 -04:00 |
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Thomas Harte
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ab2ad70885
|
Takes a run at interrupts.
|
2021-03-18 21:29:52 -04:00 |
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Thomas Harte
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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
|
c353923557
|
This can be constexpr.
|
2021-03-18 12:40:59 -04:00 |
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Thomas Harte
|
b830d62850
|
Adds quick notes on port FE.
|
2021-03-18 12:32:54 -04:00 |
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Thomas Harte
|
17f551e89d
|
Attempts a full audio wiring.
|
2021-03-18 12:23:54 -04:00 |
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Thomas Harte
|
4a4da90d56
|
Implements some of the memory map, and instantiates audio objects.
|
2021-03-18 12:14:48 -04:00 |
|
Thomas Harte
|
404c1f06e6
|
Insert missing space.
|
2021-03-18 10:44:01 -04:00 |
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Thomas Harte
|
730bfcd1fd
|
Stumbles towards a memory map.
|
2021-03-18 10:43:51 -04:00 |
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Thomas Harte
|
97249b0edd
|
Slow walks further towards a functioning Spectrum.
|
2021-03-18 10:18:17 -04:00 |
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Thomas Harte
|
5a1bda1d82
|
Performs boilerplate towards a ZX Spectrum class.
|
2021-03-17 23:38:55 -04:00 |
|
Thomas Harte
|
9bec91c2b9
|
Correct further namespace references.
|
2021-03-17 22:56:03 -04:00 |
|
Thomas Harte
|
3d1775d853
|
Correct namespace.
|
2021-03-17 22:52:23 -04:00 |
|
Thomas Harte
|
814c057570
|
Update further path references.
|
2021-03-17 22:46:25 -04:00 |
|
Thomas Harte
|
b63ca16ce2
|
Attempts to hatch a Sinclair namespace.
|
2021-03-17 22:40:29 -04:00 |
|