Thomas Harte
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b7a62e0121
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Adds SZX support.
Tweaking exposed Spectrum state object as relevant.
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2021-04-26 20:47:28 -04:00 |
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Thomas Harte
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700c505974
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Ensures the ZX Spectrum properly reports its display type.
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2021-04-25 21:16:22 -04:00 |
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Thomas Harte
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d403036d86
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Reduce bounce at Spectrum startup.
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2021-04-25 20:56:57 -04:00 |
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Thomas Harte
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2510064218
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Completes state object.
Subject to not yet dealing with last_fetches_ and last_contended_access_ correctly. Thought required.
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2021-04-25 14:20:40 -04:00 |
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Thomas Harte
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0ef2806970
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Adds just enough to ensure that border state gets through.
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2021-04-25 14:16:35 -04:00 |
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Thomas Harte
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fd271d920b
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Adds capture and forwarding of border colour.
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2021-04-25 14:00:12 -04:00 |
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Thomas Harte
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37dcf61130
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Add timing tests, fix +3 discrepancy.
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2021-04-23 22:29:57 -04:00 |
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Thomas Harte
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9731fdd33b
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Moves horizontal sync on the 48kb.
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2021-04-21 19:46:44 -04:00 |
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Thomas Harte
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d0c789ff9a
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Locks declarative form of contention closer to regular expressions.
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2021-04-21 19:37:36 -04:00 |
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Thomas Harte
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9baa861742
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Simplifies timing calculation expression.
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2021-04-21 19:18:07 -04:00 |
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Thomas Harte
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704737144a
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Corrects all interrupt timing for sign and off-by-one errors.
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2021-04-18 18:40:44 -04:00 |
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Thomas Harte
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93422f4b1c
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Brings timings into line with WoS specs.
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2021-04-16 22:40:51 -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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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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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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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
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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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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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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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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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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
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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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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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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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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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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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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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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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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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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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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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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.
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2021-03-18 23:30:48 -04:00 |
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Thomas Harte
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020a04006e
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Adds flashing, randomises initial RAM contents.
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2021-03-18 23:07:51 -04:00 |
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Thomas Harte
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622a8abf7f
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Takes a stab at pixel output.
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2021-03-18 22:57:10 -04:00 |
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Thomas Harte
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871bac6c8a
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Marks out and approximately centres a pixel region.
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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.
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2021-03-18 22:29:24 -04:00 |
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Thomas Harte
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87fc7c02e8
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Provides a base pointer for video output.
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2021-03-18 22:04:41 -04:00 |
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Thomas Harte
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f2620e6afb
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Adds a CRT. Not yet clocked.
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2021-03-18 21:54:42 -04:00 |
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Thomas Harte
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ab2ad70885
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Takes a run at interrupts.
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2021-03-18 21:29:52 -04:00 |
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Thomas Harte
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135134acfd
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Adds a shell for video emulation.
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2021-03-18 12:47:48 -04:00 |
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