Thomas Harte
|
e2b829f68e
|
Made an attempt to write the proper address mark.
|
2016-12-25 20:15:07 -05:00 |
|
Thomas Harte
|
beaa868079
|
Factored the MFM parser out into encodings.
|
2016-12-25 20:00:57 -05:00 |
|
Thomas Harte
|
74e98fd097
|
Made an attempt to write actual data (albeit that CRC calculation is still missing).
|
2016-12-25 19:18:45 -05:00 |
|
Thomas Harte
|
98be6ede45
|
Shuffled a little to reduce risk of overflow, ensured writing is a loop, still seem to be writing too quickly for some reason.
|
2016-12-25 16:13:05 -05:00 |
|
Thomas Harte
|
d2ad2c756e
|
Added enough shovelling to write rubbish for an entire sector.
|
2016-12-25 15:46:49 -05:00 |
|
Thomas Harte
|
aceb7e3b6b
|
Started implementing write sector on the 1770, immediately deciding it would be useful to have a callback for end-of-queued-data-written from disk controller. So had a go at implementing that, naively. More investigation required.
|
2016-12-25 12:31:38 -05:00 |
|
Thomas Harte
|
901f19f89c
|
Added enough stuff that SSDs attached to a 1770 will now reach the entry point for writing.
|
2016-12-25 09:46:12 -05:00 |
|
Thomas Harte
|
c304db0f5a
|
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.
|
2016-12-06 21:16:29 -05:00 |
|
Thomas Harte
|
81ee834530
|
As well as a bunch of logging, reinstated rotation position preservation across tracks.
|
2016-12-02 18:36:47 -05:00 |
|
Thomas Harte
|
93c573bfa9
|
Implemented missing status bits (other than the index hole), and a head loading delay for the Microdisc.
|
2016-12-01 21:13:16 -05:00 |
|
Thomas Harte
|
0a0775c3bd
|
Removed earlier hacky solution.
|
2016-12-01 20:16:11 -05:00 |
|
Thomas Harte
|
442986ee2c
|
Introduced a head loading path for 1793 machines.
|
2016-12-01 20:12:22 -05:00 |
|
Thomas Harte
|
82899f2f47
|
Ensured flag setting is atomic, removed duplication of interrupt request versus busy, found better names for the personality testers, unified delegate protocol.
|
2016-12-01 07:41:52 -05:00 |
|
Thomas Harte
|
b31fd11470
|
Fixed reporting of data request line, initial status values.
|
2016-11-30 22:39:55 -05:00 |
|
Thomas Harte
|
2222cb65d6
|
Split the status up into flags, assembled into a register upon demand. Attempted to implement some of the differences between the 1770/1772 and 1773/1793. Albeit with a motor fix still in place.
|
2016-11-30 22:26:02 -05:00 |
|
Thomas Harte
|
84cb07613d
|
Checked some documentation more thoroughly; the 1793 has quite different spin-up (/head load) semantics. So it's another distinct personality. Grrr.
|
2016-11-27 20:39:08 -08:00 |
|
Thomas Harte
|
02ba1f220f
|
The '72 seems to be a '70 with altered timing. So worth differentiating.
|
2016-11-27 21:06:17 +08:00 |
|
Thomas Harte
|
2c01f9dbed
|
Added meaningful TODOs.
|
2016-11-27 08:42:39 +08:00 |
|
Thomas Harte
|
2f459690d4
|
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.
|
2016-11-26 23:29:30 +08:00 |
|
Thomas Harte
|
d8ecc52de8
|
Temporarily disabled spin-down as harmful to the status register if following anything other than a Type 1 command.
|
2016-11-26 22:27:20 +08:00 |
|
Thomas Harte
|
b9677c9927
|
Consolidated interrupt request setting.
|
2016-11-26 09:41:53 +08:00 |
|
Thomas Harte
|
d5f9e0aa3b
|
Ensured there's no such thing as a zero-cycle operation, even if i don't yet know exactly what I should be doing.
|
2016-11-25 21:24:25 +08:00 |
|
Thomas Harte
|
4af678d2ed
|
Gave the Microdisc a clock signal, added just enough of force interrupt to avoid a spurious belief that a type 3 command has started.
|
2016-11-25 20:51:39 +08:00 |
|
Thomas Harte
|
d4a1961378
|
Added getters for the IRQ and DRQ lines plus a delegate to receive changes; adjusted code so that the two lines signal.
|
2016-11-21 13:21:49 +08:00 |
|
Thomas Harte
|
79412dc84d
|
Upped MFM clock cycles, switched back to using the typer for the ADFS and adjusted ADFS ROM slots.
|
2016-09-28 21:28:34 -04:00 |
|
Thomas Harte
|
91235c7fd7
|
Fixed issue whereby parts of data that merely looked like index or ID address marks within tracks caused a resynchronisation of the tokeniser.
|
2016-09-27 07:36:37 -04:00 |
|
Thomas Harte
|
6330e5706c
|
Fixed seek verify. First ADFS directory is visible.
|
2016-09-25 21:44:46 -04:00 |
|
Thomas Harte
|
4db086949a
|
Made an attempt to add MFM decoding to the 1770; ensured something is returned when reading the Plus 3 status register again.
|
2016-09-25 21:38:52 -04:00 |
|
Thomas Harte
|
572d5587d9
|
Made a first stab at enabling multi-disk machines and thereby obeying (some of) the Plus 3's status register.
|
2016-09-25 21:24:16 -04:00 |
|
Thomas Harte
|
9bbcbd1001
|
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.
|
2016-09-25 20:05:56 -04:00 |
|
Thomas Harte
|
6084020ab3
|
Added shift-break as a better way to boot suitable disks. Continued attempting to clean the 1770.
|
2016-09-25 14:11:22 -04:00 |
|
Thomas Harte
|
a538b45213
|
Sought to implement the verify step of type 1 commands.
|
2016-09-25 09:54:49 -04:00 |
|
Thomas Harte
|
0918751802
|
Fixed stepping out.
|
2016-09-24 22:48:45 -04:00 |
|
Thomas Harte
|
9e1d4c8b01
|
Fixed an initial setup error with seek.
|
2016-09-24 22:43:12 -04:00 |
|
Thomas Harte
|
d50629e6aa
|
This is clearly the winning solution. Edited down.
|
2016-09-24 22:36:38 -04:00 |
|
Thomas Harte
|
07ff5138b7
|
The catalogue now loads.
|
2016-09-24 22:35:34 -04:00 |
|
Thomas Harte
|
1b69ad0fd4
|
This attempts to implment sector reading. DFS reports an error.
|
2016-09-24 22:29:02 -04:00 |
|
Thomas Harte
|
ce4100e5b9
|
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.
|
2016-09-24 22:04:54 -04:00 |
|
Thomas Harte
|
7154e8986e
|
Fixed stepping delay.
|
2016-09-24 20:16:23 -04:00 |
|
Thomas Harte
|
53522e28e2
|
Performed an about-face on how this should probably be implemented. Now forsaking the state machine in favour of a macro'd switch-for-cooperative-event-based-messaging implementation. Let's see how this ends up looking.
|
2016-09-24 20:12:45 -04:00 |
|
Thomas Harte
|
88bbeedad3
|
Set actual bit length.
|
2016-09-22 21:28:23 -04:00 |
|
Thomas Harte
|
75eb62b577
|
One painful step at a time, this now starts the disk rotating and gets as far as deciding whether it's about to head off on a read or a write.
|
2016-09-22 21:25:31 -04:00 |
|
Thomas Harte
|
8db0030068
|
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.
|
2016-09-20 22:14:33 -04:00 |
|
Thomas Harte
|
7a34ae0da6
|
This is the start of my slog through type 1 commands. I kind of need to figure out what I'm doing about drives and PLLs now though.
|
2016-09-20 16:58:23 -04:00 |
|
Thomas Harte
|
3b97b038b9
|
Corrected and sketched out state machine far enough to get to a complaint about unhandled work.
|
2016-09-20 15:56:31 -04:00 |
|
Thomas Harte
|
a9e65e9b7a
|
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.
|
2016-09-19 22:06:56 -04:00 |
|
Thomas Harte
|
bcf91de7e9
|
Declared support for the Acorn disk files, started hammering out an encoder.
|
2016-09-18 13:35:54 -04:00 |
|
Thomas Harte
|
e3daf80564
|
Added a file for the 1770, at least.
|
2016-09-17 18:01:00 -04:00 |
|