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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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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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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Thomas Harte
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0945049cd3
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Made attempt to connect sync detect and then apply appropriate windowing, posting bytes to the appropriate place.
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2016-07-31 18:29:44 -04:00 |
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Thomas Harte
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198fbbedc7
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Reeled back all appropriate pieces of caveman debugging.
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2016-07-31 13:42:34 -04:00 |
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Thomas Harte
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2332f72875
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Formalised clock-rate multiplication within disk drives, discovered that the stepper didn't have ideal behaviour for my timed event loop and hence nailed down the semantics a ilttle more.
(obiter: the 1540 now appears to discern the correct sequence of bits. Framing is off in my test printfs but that's neither here nor there).
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2016-07-31 13:32:30 -04:00 |
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Thomas Harte
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8f62211f5e
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Wired up the 1540 as a PLL delegate. Which prima facie means it should start receiving a bit stream. Except that I clearly have something in the timing way off — either my flux transitions are far too short or I need to significantly increase the clock rate on the PLL.
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2016-07-29 12:08:18 -04:00 |
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Thomas Harte
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89a1881fef
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Started turning the 1540 into an actual disk drive.
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2016-07-29 11:03:09 -04:00 |
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Thomas Harte
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ada2f073e0
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Completed handing of the disk all the way to the 1540.
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2016-07-10 16:24:46 -04:00 |
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Thomas Harte
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6cfc514c2d
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Made the rote changes necessary to attempt to open and to supply a G64 to the Vic.
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2016-07-10 12:57:17 -04:00 |
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Thomas Harte
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4ca6883f7c
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Disabled attachment of a 1540 again, as I probably need to move to opening an actual disk image next.
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2016-07-10 08:03:36 -04:00 |
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Thomas Harte
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824d9ea92b
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Added further comments.
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2016-07-10 08:01:16 -04:00 |
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Thomas Harte
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d8334edf4a
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Started trying to clean up, including commuting the C1540 source file name to match its class name but mainly by adding documentation.
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2016-07-10 07:46:20 -04:00 |
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Thomas Harte
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c0ab45a73d
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Disabled a bunch of the caveman debug logging.
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2016-07-09 22:29:11 -04:00 |
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Thomas Harte
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f589d639db
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Okay, so it seems that sync also works the other way around.
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2016-07-09 22:25:44 -04:00 |
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Thomas Harte
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693c8b2438
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After all that, it seems likely that inputs just aren't inverted for the Vic.
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2016-07-09 20:03:38 -04:00 |
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