Thomas Harte
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a568172758
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Made steps towards proper CRC generation. Am currently comparing against Oric disk images, as — amongst other things — they include precomputed CRCs.
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2016-12-28 18:29:37 -05:00 |
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Thomas Harte
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e62be03673
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Removed endianness assumption.
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2016-12-10 19:10:33 -05:00 |
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Thomas Harte
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a5683dfb21
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Removed now untrue comment.
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2016-12-10 15:19:48 -05:00 |
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Thomas Harte
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0e71802b92
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Reduced Oric video to single nibble constants. Removed attempt at asynchronous flush as no longer required.
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2016-12-10 14:17:46 -05:00 |
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Thomas Harte
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580f347727
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Fixed Oric SCART mode by having it change what it's giving to the CRT based on which shader it knows will be active.
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2016-12-10 13:55:56 -05:00 |
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Thomas Harte
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a549fd1ecc
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Introduced the ability simply to piggy-back off the CRT's natural phase for the colour burst, thereby eliminating a couple of redundant independent attempts in the Oric and Electron.
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2016-12-10 13:42:34 -05:00 |
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Thomas Harte
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6cdd41e5a9
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Added direct use of the colour ROM, uploading 16 bits per pixel to contain the entire ROM composite wave.
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2016-12-09 22:17:10 -05:00 |
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Thomas Harte
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3b5962b171
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This is an initial attempt at using the actual Oric colour ROM values for composite video generation.
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2016-12-09 20:01:27 -05:00 |
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Thomas Harte
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c304db0f5a
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Deintegrated the busy flag and the interrupt request line, as the latter is reset by status reads. Which also means I can start reporting the WD INTRQ line status directly from the Microdisc. That appears to be correct, rather than honouring the Microdisc IRQ select there.
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2016-12-06 21:16:29 -05:00 |
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Thomas Harte
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2003b514aa
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Switched the typer to postfix underscores.
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2016-12-03 10:55:50 -05:00 |
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Thomas Harte
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81ee834530
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As well as a bunch of logging, reinstated rotation position preservation across tracks.
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2016-12-02 18:36:47 -05:00 |
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Thomas Harte
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93c573bfa9
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Implemented missing status bits (other than the index hole), and a head loading delay for the Microdisc.
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2016-12-01 21:13:16 -05:00 |
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Thomas Harte
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442986ee2c
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Introduced a head loading path for 1793 machines.
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2016-12-01 20:12:22 -05:00 |
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Thomas Harte
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82899f2f47
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Ensured flag setting is atomic, removed duplication of interrupt request versus busy, found better names for the personality testers, unified delegate protocol.
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2016-12-01 07:41:52 -05:00 |
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Thomas Harte
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9b6c5e814a
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Now that it can be more explicit, this should admit that it's '93-based, not '73.
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2016-11-28 16:22:35 -05:00 |
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Thomas Harte
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2f459690d4
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It would appear the 1770 and 1773 actually differ in relation to the (non-sensical) ability not to spin-up for a Type 2, and whether a side compare can occur. So the WD1770 class now requires a personality to be specified. Which it singly fails to honour.
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2016-11-26 23:29:30 +08:00 |
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Thomas Harte
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e9d6566e9c
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Of course, changing the IRQ enable may immediately change the IRQ line. Signal if so.
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2016-11-26 09:35:44 +08:00 |
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Thomas Harte
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73d30b9c00
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Corrected typo.
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2016-11-25 21:30:45 +08:00 |
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Thomas Harte
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12956901d6
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Filled in some register mirrors.
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2016-11-25 21:28:11 +08:00 |
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Thomas Harte
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54246c8f1a
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Interrupt enabling works the other way around I think, and both registers with only one bit defined should probably return '1' in all other places?
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2016-11-25 21:24:59 +08:00 |
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Thomas Harte
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8be81f6ebd
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Supplied disks are given to the Microdisc.
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2016-11-25 20:53:38 +08:00 |
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Thomas Harte
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4af678d2ed
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Gave the Microdisc a clock signal, added just enough of force interrupt to avoid a spurious belief that a type 3 command has started.
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2016-11-25 20:51:39 +08:00 |
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Thomas Harte
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5c019ad1c0
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Okay, so it looks like both ROM paging flags are the opposite of what I previously had.
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2016-11-25 20:42:40 +08:00 |
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Thomas Harte
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5be45c6c50
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Ensured proper default behaviour.
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2016-11-25 20:30:27 +08:00 |
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Thomas Harte
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d33f3b9224
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This is the broad strokes effort at enabling Microdisc emulation.
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2016-11-25 20:15:48 +08:00 |
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Thomas Harte
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7c2d9f3752
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This seems to be right, per http://wiki.defence-force.org/doku.php?id=oric:hardware:floppy_disk_controller_wd1793
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2016-11-22 22:35:43 +08:00 |
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Thomas Harte
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5ebc1c63ff
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Switched video to postfix underscores, for consistency.
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2016-11-22 22:28:45 +08:00 |
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Thomas Harte
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707763f80b
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Added Microdisc storage to the Oric class, switching all instance storage to postfix underscore while I'm here.
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2016-11-22 22:22:00 +08:00 |
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Thomas Harte
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0c3644f350
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Made a second parse at logic. We'll see.
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2016-11-22 22:12:32 +08:00 |
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Thomas Harte
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03843bf934
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Unified delegates. Let's keep it easy for the caller.
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2016-11-22 22:11:11 +08:00 |
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Thomas Harte
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13a608a8c2
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Added what may be correct paging logic.
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2016-11-22 22:09:52 +08:00 |
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Thomas Harte
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363db695e8
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Started implementation of the Microdisc selection logic.
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2016-11-22 08:12:53 +08:00 |
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Thomas Harte
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ea33a28695
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Any Oric-format disks that are inserted now make it all the way to the Oric, along with a request to emulate the Microdisc. It has received a copy of the ROM. The ball is entirely in its court now.
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2016-11-21 20:59:25 +08:00 |
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Thomas Harte
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8b40ae03ca
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Extended analysis to spot IRQ and NMI vector changes, for titles that simply adjust those then exit. Ensured Oric emulator can type and load quickly on an Oric 1 just as well as on an Atmos.
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2016-11-15 11:05:53 +08:00 |
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Thomas Harte
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e2cdfae8a7
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The emulated Oric now has access to both versions of the BASIC ROM and picks between them based on the static analyser's recommendation.
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2016-11-15 10:39:16 +08:00 |
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Thomas Harte
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9c550c594a
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Moved audio work back into its own thread, but this time it queues up an all happens only upon a flush. Hopefully to resolve synchronisation cost concerns.
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2016-11-09 21:17:50 -05:00 |
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Thomas Harte
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64827931bf
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Switched the Oric implementation simply to rely upon the Storage-level tape parser. So now there's only one, authoritative one of those.
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2016-11-07 21:57:58 -05:00 |
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Thomas Harte
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45b169f341
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Made a few mapping fixes, clarified where the default reset code lives, ensured the Oric and Vic clear their keys when the typer ends.
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2016-11-05 15:28:03 -04:00 |
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Thomas Harte
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338904fffe
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Made similar cleanings of the Electron and Vic.
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2016-11-05 15:07:57 -04:00 |
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Thomas Harte
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9fb9d92437
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Made the typer much more able to help out, and thereby tidied and separated the Oric's typer.
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2016-11-05 14:47:09 -04:00 |
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Thomas Harte
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626e719fab
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Added sanity checks on loading quickly.
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2016-11-03 22:50:49 -04:00 |
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Thomas Harte
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a7e4c0c3b5
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Switched to a ROM trap for typing.
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2016-11-03 22:21:05 -04:00 |
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Thomas Harte
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8c70dc5891
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Implemented typer for the Oric, and I'm starting to think the code is a bit too repetitious. Refactoring will be forthcoming. Added CLOAD"" as the loading command for all Oric software.
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2016-11-03 22:14:40 -04:00 |
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Thomas Harte
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9c2df231ce
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Made fast loading optional.
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2016-11-03 07:59:30 -04:00 |
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Thomas Harte
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e9f1a6a79d
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This appears to be it. The secret? Don't worry about the stop bits. They're just processing time. Latch onto the next start.
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2016-11-03 07:34:48 -04:00 |
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Thomas Harte
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827a919368
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This is an initial attempt at reading actual tape data. It loses sync though.
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2016-11-02 22:30:53 -04:00 |
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Thomas Harte
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419629ee6e
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Completed proof of theory for fast loading. It's just an around-the-back direct-to-file hack for now though.
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2016-11-02 21:09:49 -04:00 |
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Thomas Harte
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bb58caff52
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Merge branch 'master' into FastOricTape
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2016-10-31 22:11:03 -04:00 |
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Thomas Harte
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21604376e6
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Reintroduced clocking of the AY and boxed in the range of the master divider a little further.
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2016-10-30 22:51:08 -04:00 |
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Thomas Harte
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33512988fb
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Added a basic cycle skipper plus some notes.
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2016-10-30 22:39:47 -04:00 |
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Thomas Harte
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b04ba41951
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Moved code out of header.
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2016-10-30 20:16:58 -04:00 |
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Thomas Harte
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3b52ab0d37
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Cut some dead state.
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2016-10-30 20:16:52 -04:00 |
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Thomas Harte
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58f888c6ad
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Limited CRT calls.
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2016-10-30 16:21:20 -04:00 |
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Thomas Harte
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1ff9b474bf
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Made an attempt to make execution flow through this loop more straightforward for a branch predictor.
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2016-10-30 15:30:39 -04:00 |
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Thomas Harte
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4fab794747
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Added a direct-to-two-cycles emulation path for 6522 owners.
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2016-10-27 21:13:25 -04:00 |
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Thomas Harte
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2eda0b3c86
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Attempted to simplify the logic behind the most common 6522 usage.
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2016-10-27 21:06:31 -04:00 |
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Thomas Harte
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30d4a7c662
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Fixed: blinking means ink vanishing and appearing. Nothing else.
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2016-10-24 21:58:15 -04:00 |
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Thomas Harte
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09687a2e2f
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Removed errant newline.
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2016-10-20 21:30:12 -04:00 |
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Thomas Harte
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44910d90ba
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Adjusted aberrations in semicolons.
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2016-10-20 21:20:13 -04:00 |
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Thomas Harte
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d335991e60
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Shifted code out of the header.
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2016-10-20 20:53:17 -04:00 |
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Thomas Harte
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9c956f83b8
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Made it slightly more clear that the correct test is conformed to.
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2016-10-20 19:23:36 -04:00 |
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Thomas Harte
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21cfb39ed9
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Added 60Hz output support.
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2016-10-20 07:34:23 -04:00 |
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Thomas Harte
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5c69728625
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Introduced a memory fuzzer, and ensured the Oric uses it.
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2016-10-19 21:31:50 -04:00 |
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Thomas Harte
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734b575d30
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Ensured no attempt to write to pixel storage if none was available.
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2016-10-19 21:17:27 -04:00 |
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Thomas Harte
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ca28e3c64e
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Ensured the AY is pumped linearly, not exponentially.
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2016-10-18 22:21:06 -04:00 |
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Thomas Harte
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9669a5ec9b
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Switched to a more authentic interfacing to the AY.
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2016-10-18 19:32:15 -04:00 |
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Thomas Harte
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988bbb5ab1
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Ensured AY registers aren't rewritten just because of a synchronise event. A stall prior to figuring out proper bus logic, clearly.
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2016-10-17 08:05:57 -04:00 |
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Thomas Harte
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1a57e89ff0
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Altered phase so that it now merely accounts for accumulated error across a frame. Can probably do better.
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2016-10-17 08:04:15 -04:00 |
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Thomas Harte
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61ad0f8bdc
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Fixed inverse characters, added an extra per-frame phase change, based on empirical observation, ensured header guard won't become ambiguous.
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2016-10-16 22:14:01 -04:00 |
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Thomas Harte
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a67afb7efa
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Switched to a tight crop on the pixel part of the display.
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2016-10-15 21:43:46 -04:00 |
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Thomas Harte
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a608bbebfb
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Performed enough wiring to put the onus back onto OricTAP to do appropriate things.
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2016-10-15 21:32:59 -04:00 |
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Thomas Harte
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6d7c3f6ac2
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Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric.
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2016-10-15 21:21:18 -04:00 |
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Thomas Harte
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9730e8247f
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Ensured propagation of synchronise messages, added enough to do plain tone. Probably. So: noise and envelopes missing. And it's all far too quiet.
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2016-10-15 21:04:21 -04:00 |
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Thomas Harte
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51bdac27ae
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Made some AY advances; it's now being polled for samples and collecting more information on what it needs to output.
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2016-10-15 17:45:39 -04:00 |
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Thomas Harte
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da9c9ad51a
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Added in the missing keys; added variable phase to the video.
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2016-10-14 22:39:27 -04:00 |
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Thomas Harte
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288d10c253
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Got some keyboard reaction.
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2016-10-14 21:44:15 -04:00 |
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Thomas Harte
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3dbb602419
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This seems to be a bit more likely.
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2016-10-14 21:36:59 -04:00 |
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Thomas Harte
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138eabcff4
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Continued in my effort to wire up a keyboard. Will need further to continue.
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2016-10-14 21:35:15 -04:00 |
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Thomas Harte
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d8e4c488c2
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Started iterating towards having an AY and a fully-working keyboard.
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2016-10-14 21:18:03 -04:00 |
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Thomas Harte
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8867ad647c
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Made an attempt at implementing the loopbacks necessary for diagnostics.
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2016-10-13 21:47:12 -04:00 |
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Thomas Harte
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41e7eff6c8
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Added a VIA. Now it's time to find out how poor my 6522 emulation is.
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2016-10-13 20:50:55 -04:00 |
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Thomas Harte
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c9962f6502
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Made an almost complete implementation of video. Just one row of the diagnostics cartridge seems to be off, showing thw wrong character set.
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2016-10-13 19:34:29 -04:00 |
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Thomas Harte
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69920a4979
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Made some basic first attempt at parsing video attributes; ensured lowest byte of ROM is readable.
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2016-10-13 07:59:11 -04:00 |
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Thomas Harte
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ae48ad1bb4
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Meaningful text! Albeit with the initial 'O' of 'Oric' missing. I guess control codes and NMIs next?
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2016-10-12 22:03:54 -04:00 |
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Thomas Harte
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120b2d9e33
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Switched to using a diagnostic ROM for now, as it'll definitely boot without initially requiring either a 6522 or AY. Have some forms appearing which imply I'm not doing badly, at least up to not knowing where I'm supposed to get character pixels from.
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2016-10-12 21:52:47 -04:00 |
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Thomas Harte
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1f857c619b
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Fixed timing issues. Static box of frame achieved!
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2016-10-12 21:42:36 -04:00 |
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Thomas Harte
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304f0999cd
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Made a faulty but hopefully creditable attempt to demarcate an Oric frame.
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2016-10-12 21:29:21 -04:00 |
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Thomas Harte
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8c8a71107e
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Added just enough wiring to add something that will generate the video, one day.
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2016-10-12 19:20:23 -04:00 |
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Thomas Harte
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e6937d8003
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Ensured that the ROM gets installed. So next for some video action?
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2016-10-12 18:51:02 -04:00 |
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Thomas Harte
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4a062c616f
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Added enough wiring to get Oric TAPs through to a completely unimplemented Oric emulation.
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2016-10-11 22:20:13 -04:00 |
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