Thomas Harte
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4db086949a
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Made an attempt to add MFM decoding to the 1770; ensured something is returned when reading the Plus 3 status register again.
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2016-09-25 21:38:52 -04:00 |
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Thomas Harte
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572d5587d9
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Made a first stab at enabling multi-disk machines and thereby obeying (some of) the Plus 3's status register.
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2016-09-25 21:24:16 -04:00 |
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Thomas Harte
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9bbcbd1001
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Renamed class, intending to turn a Disk::Drive into literally just that, and have a thing with a PLL that consumes events be a Controller.
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2016-09-25 20:05:56 -04:00 |
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Thomas Harte
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7f4c78139c
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Attempted to ensure that ADFS disks get to an appropriately-configured Electron. Not immediately sure why the shift press isn't working; doesn't need to be dealt with immediately.
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2016-09-25 19:59:46 -04:00 |
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Thomas Harte
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6084020ab3
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Added shift-break as a better way to boot suitable disks. Continued attempting to clean the 1770.
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2016-09-25 14:11:22 -04:00 |
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Thomas Harte
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ce4100e5b9
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Fixed slots for DFS and ADFS to sideways RAM; continued working on the 1770 to get as far as trying to get the body of a sector.
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2016-09-24 22:04:54 -04:00 |
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Thomas Harte
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8db0030068
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Fixed ROM loading by the Electron, turned the WD1770 into a 'disk drive' (it'll do for now), persuaded it to get all the way through a very specifically convenient type 1 command.
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2016-09-20 22:14:33 -04:00 |
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Thomas Harte
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3b97b038b9
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Corrected and sketched out state machine far enough to get to a complaint about unhandled work.
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2016-09-20 15:56:31 -04:00 |
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Thomas Harte
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e358057440
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Added a WD1770 run_for_cycles call. So I really can now move that as far as reporting that it has no disk?
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2016-09-20 07:42:17 -04:00 |
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Thomas Harte
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cd5939501f
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Treading water some more, ensured the DFS and ADFS ROMs get to the Electron. It now even inserts the DFS ROM if it has a DFS disk image. Might need to make it a sideways RAM though? Regardless, the next job surely — surely! — has to be to stop avoiding the 1770?
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2016-09-20 07:36:57 -04:00 |
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Thomas Harte
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a9e65e9b7a
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Tweaked disk side density, added call-outs to a WD1770 if the Electron had one (albeit without run_for_cycles yet as I need to figure out the clock rate), added a shell of the basic functions of the WD1770. No implementation yet.
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2016-09-19 22:06:56 -04:00 |
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Thomas Harte
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64f2538b1f
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Added CRC checking to DFS comprehension; fixed a bunch of places where I'd used Objective-C's #import rather than #include.
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2016-09-19 08:16:06 -04:00 |
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Thomas Harte
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142254a478
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Resolved failure to open disks that arrive through analysis.
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2016-09-17 18:11:58 -04:00 |
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Thomas Harte
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ee8510984f
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Added just enough wiring to restore the 2600 to functionality.
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2016-09-15 19:34:45 -04:00 |
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Thomas Harte
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e3571e8b9e
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Added insurance against an infinite loop should the tape be exhausted.
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2016-09-12 22:22:23 -04:00 |
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Thomas Harte
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40660fe680
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Made yet another guess at Commodore analysis. Elevated fast tape-related unnatural speed up to the OS-side mechanisms.
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2016-09-12 22:06:03 -04:00 |
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Thomas Harte
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e54a2326a3
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Made attempt to run at zero cost while processing tape input.
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2016-09-11 17:34:02 -04:00 |
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Thomas Harte
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eeec516fa6
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Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator.
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2016-09-11 17:09:00 -04:00 |
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Thomas Harte
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8c84f3581a
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Attempted to bring some uniformity in application of configurations.
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2016-09-08 05:32:17 -04:00 |
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Thomas Harte
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50175a9aed
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Added logic to try to spot when the first program is BASIC and, if so, what the correct memory model is, then to get that information to the Vic. Though it currently then gets overwritten by the view controller. Grrrr.
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2016-09-07 22:17:19 -04:00 |
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Thomas Harte
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21e5f407d8
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I need to get a bit more definitive on naming but this gets all the way to setting a configuration upon an Electron.
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2016-08-31 22:03:42 -04:00 |
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Thomas Harte
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56c0d70c1f
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Gave disks their own namespace.
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2016-08-27 17:15:09 -04:00 |
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Thomas Harte
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c0402d0c2b
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Gave tapes their own namespace.
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2016-08-27 17:09:45 -04:00 |
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Thomas Harte
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55ada536ac
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Added a test call, further mutated result structure.
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2016-08-27 14:25:16 -04:00 |
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Thomas Harte
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dab3580111
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Experimental: can I afford a lower sampling rate if there's a low-pass filter in effect?
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2016-08-22 22:18:05 -04:00 |
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Thomas Harte
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1541273785
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Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately.
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2016-08-21 18:13:31 -04:00 |
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Thomas Harte
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99157ad6b2
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Ensured the 6560 knows its real audio clock on a PAL machine; removed some stray semicolons.
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2016-08-19 13:35:34 -04:00 |
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Thomas Harte
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e985c72ce8
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Removed a dead special case.
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2016-08-19 12:23:06 -04:00 |
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Thomas Harte
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4edd1214f1
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This has now successfully loaded its first PRG-as-a-tape.
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2016-08-19 10:58:42 -04:00 |
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Thomas Harte
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2935848f35
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Adopted header/header/data/data pattern. But still not complete joy.
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2016-08-17 08:03:34 -04:00 |
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Thomas Harte
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dfe9fb83ef
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This proves that bytes are being deposited properly. For the first 36 anyway, and with no announcement.
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2016-08-16 21:09:50 -04:00 |
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Thomas Harte
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12f8aff65b
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Lengths I'd taken seem to have been for dipoles, not single poles. So I just doubled the clock rate. Also I was producing each dipole as high then low, when they should probably be low then high. The Vic now at least recognises that something is happening on the tape.
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2016-08-16 19:46:53 -04:00 |
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Thomas Harte
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ca2dc6b6c4
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Ensured ROMs survive in the new memory model.
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2016-08-15 19:56:01 -04:00 |
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Thomas Harte
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38aec44d85
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Made sufficient changes for the Vic itself to believe it can recast a PRG as a tape and insert it that way. So now the ball is in the court of: how the heck are Commodore tapes encoded?
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2016-08-15 19:44:41 -04:00 |
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Thomas Harte
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547aefb696
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Slightly adjusted PRG strategy, made a note about where next.
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2016-08-14 16:36:42 -04:00 |
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Thomas Harte
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d9016909ed
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Added some wiring for PAL/NTSC mode switching on the Vic, making an attempt to simplify the whole loop of having different clock rates.
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2016-08-14 13:33:20 -04:00 |
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Thomas Harte
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a547b7e1d8
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Took basic steps towards supporting memory expansions.
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2016-08-13 17:21:25 -04:00 |
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Thomas Harte
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142774be37
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Collapsed 6560 template to a more direct loop, albeit with quite a bit still left to fix.
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2016-08-09 21:10:53 -04:00 |
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Thomas Harte
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12bad8f23f
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Turned the 6560 into an ordinary template, similar to the rest of the project, albeit right now with a fairly shonky internal implementation. Fixed a Mac-specific interface sizing issue.
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2016-08-09 20:41:05 -04:00 |
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Thomas Harte
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285a288c80
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Switched to two cycles of options loading, meaning that they get set before files are inserted. Might need some further work?
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2016-08-07 21:48:09 -04:00 |
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Thomas Harte
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be54d8040e
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Made a first stab at having automatic loading be optional. But things are currently arranged such that the machine options are communicated too late to have an effect. So work to do.
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2016-08-06 17:39:27 -04:00 |
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Thomas Harte
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3e65450a54
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Converted the 6560 fully into a template; worked on allowing the typer to run at a much faster rate where hardware has some trigger by which it can request the next key.
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2016-08-06 14:33:24 -04:00 |
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Thomas Harte
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d832e5e10d
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Reduced 1540 PLL to running at 4Mhz. Which is possibly correct (?) Made minor change to avoid divide if possible.
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2016-08-02 21:28:50 -04:00 |
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Thomas Harte
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5d40d70c92
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Fixed 6560 addressing error, added an autotyper for Vic disks (more work potentially needed), fixed semantics for testing whether a 6502 is about to reset.
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2016-08-01 10:32:32 -04:00 |
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Thomas Harte
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bc10b3ee9a
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It appears the problem is as simple as sectors being counted from zero.
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2016-08-01 10:08:38 -04:00 |
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Thomas Harte
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f5e4ea3351
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Some minor tidying, lots more of the caveman stuff as I try to determine what I'm doing wrong.
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2016-08-01 09:43:08 -04:00 |
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Thomas Harte
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18744cd98b
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Slightly updated comments, switched to 1540 ROM so as very slightly to improve loading time.
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2016-08-01 04:37:30 -04:00 |
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Thomas Harte
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b43a7381ae
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Fixed framing and first-byte-after-sync signalling. Hacked together as parts of it are, loading now appears to work!
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2016-08-01 04:25:11 -04:00 |
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Thomas Harte
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41893b5ef6
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Put in the absolute minimum logic for drive motor emulation. Drive appears to be attempting head steps.
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2016-07-31 19:38:51 -04:00 |
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Thomas Harte
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740ea0b7e2
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Added overflow-flag setting logic and ensured disk ROM gets through regardless of ROM/disk installation order.
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2016-07-31 19:33:18 -04:00 |
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