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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3a23d5d8cf
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Adjusted the check digit.
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2016-08-15 22:44:36 -04:00 |
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Thomas Harte
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dbe47f3f45
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I've obviously misunderstood something as, as far as I'm concerned, this should at least get me a 'LOADING'.
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2016-08-15 22:40:05 -04:00 |
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Thomas Harte
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7994148f55
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I'm starting to make a little headway, I think: this performs lead-ins and countdowns, though with no actual data or anything as helpful as that.
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2016-08-15 22:10:53 -04:00 |
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Thomas Harte
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7e2b4554ea
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This likely forms the Commodore dipoles correctly. It just stays stuck in leader tone forever is all.
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2016-08-15 20:08:50 -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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3aa40212f3
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Fixed minor documentation error; admitted that this class didn't invent the idea of a pulse.
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2016-08-15 19:37:21 -04:00 |
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Thomas Harte
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e59301b416
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Merge pull request #45 from TomHarte/MemoryModels
Vic: Adds support for expanded memory and PAL region machines.
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2016-08-14 20:01:19 -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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6079d30e58
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Eliminated waiting here — either the buffer can be enqueued now or it is dropped.
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2016-08-14 16:20:24 -04:00 |
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Thomas Harte
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48a00d9e05
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... which means that all files are now expected.
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2016-08-14 14:24:03 -04:00 |
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Thomas Harte
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5373f6cc57
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Completed setting of options, including mapping from country to ROM + television standard.
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2016-08-14 14:23:08 -04:00 |
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Thomas Harte
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b5af1746d5
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Added a through path to the Objective-C for setting region and memory size.
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2016-08-14 14:14:59 -04:00 |
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Thomas Harte
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f15d89239f
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Made a stab at storage and restoration of country and memory size.
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2016-08-14 14:00:08 -04:00 |
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Thomas Harte
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df77c2a20a
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Added the XIB side of wiring for region and memory size options.
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2016-08-14 13:53:14 -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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0a13dd5c5b
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Merge pull request #44 from TomHarte/6560Template
Shifted the 6560 into an idiomatic template form; switched automatic loading to optional.
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2016-08-12 20:58:34 -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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c6e046253e
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Shunted code for the main part up into the header, in advance of turning it into a template so as to bring it inside the normal orthodoxy.
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2016-08-05 19:13:49 -04:00 |
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Thomas Harte
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9d76cd9b60
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Removed dead instance storage.
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2016-08-04 21:41:12 -04:00 |
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Thomas Harte
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b46355331c
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Merge pull request #43 from TomHarte/NonSkippingTracks
Sought to prevent a reset of angular position when changing tracks
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2016-08-04 21:39:18 -04:00 |
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Thomas Harte
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3e90b85ff8
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Made an attempt to insert proper conversions to/from rotational speed. The Time class is now really turning into a full-on quotient. Might need refactoring.
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2016-08-04 21:36:39 -04:00 |
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Thomas Harte
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e57ab1025d
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Fixed location calculation, up to a point.
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2016-08-03 22:33:00 -04:00 |
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Thomas Harte
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9af9b28baf
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Made very first attempt at closing the loop on this. But it's time for work.
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2016-08-03 08:16:23 -04:00 |
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Thomas Harte
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e15241dc3c
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Added ability to query how long since the new interval was set to the timed event loop. Discovered that LCM will returning the net effect of the common factors only. Otherwise continued iterating towards time preservation.
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2016-08-03 07:49:00 -04:00 |
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Thomas Harte
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a3a3486f54
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Okay, it's becoming more apparent where the (very mild) complexity will be here. But started moving towards retaining rotation between tracks.
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2016-08-03 07:33:26 -04:00 |
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Thomas Harte
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21f1fa37a4
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Fixed Time addition, added accumulation of distance into track into the disk drive, added a short circuit for LCM.
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2016-08-03 07:26:05 -04:00 |
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Thomas Harte
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30f8b6baa4
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Made an attempt to add the necessary extension to Track, with a concrete implementation in PCMTrack, to support time-based seeking, the intended mechanism for not magically spinning the disk back to the index hole upon every head step.
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2016-08-03 06:59:45 -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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d74c3760fb
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Update README.md
Added the Commodore 1540 as an emulated machine, given that it has a CPU and all.
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2016-08-01 10:19:25 -04:00 |
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Thomas Harte
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95a3c42407
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Merge pull request #42 from TomHarte/D64
Adds support for the .d64 file format
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2016-08-01 10:13:22 -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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a00f9adba3
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Made a first attempt at D64 support. Made an error somewhere but this should be 90% of it.
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2016-08-01 08:41:16 -04:00 |
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Thomas Harte
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58297f1baf
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Performed the basic metadata and routing for opening D64 files. Realised that I wasn't actually necessarily catching exceptions properly for all file opens, and fixed.
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2016-08-01 07:09:15 -04:00 |
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Thomas Harte
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ee2a7c9415
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Added slightly to exposition, to match other formats.
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2016-08-01 06:54:57 -04:00 |
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Thomas Harte
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2799a87218
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Reduced possibility of overflow on LCM, improved commenting widely, removed one stale piece of G64 bootstrapping caveman stuff.
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2016-08-01 06:04:55 -04:00 |
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Thomas Harte
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a2ca94431e
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Merge pull request #41 from TomHarte/DiskDrive
Implements something of the foundation for disk drive emulation
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2016-08-01 04:43:07 -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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