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Commit Graph

982 Commits

Author SHA1 Message Date
Thomas Harte
d1abfc040c Addressed my dithering here: the file format containers themselves should do nothing but inspect the data to find out whether it is of the correct format. The machine steps are there for machine-specific validation. So it's probably easier to treat a binary ROM image just as a binary ROM image. Therefore, the Acorn-specific .rom detection is now in an Acorn-specific area. 2016-08-29 08:48:49 -04:00
Thomas Harte
29c972f4b8 Added hacky segue into analysis for all Electron formats. Added analyser to try to differentiate Acorn-format ROMs from other things called .rom, which are likely to be numerous. 2016-08-28 12:43:17 -04:00
Thomas Harte
d9f0065154 Sketched out just enough classes to get through the get-contents-into-memory step of static analysis. 2016-08-28 12:20:40 -04:00
Thomas Harte
24938326ac ROMs definitely have no behaviour other than responding to memory accesses. Cartridges might. So picked the more general term. Sketched out a class at least to parse PRG as though it were a cartridge. Hence the static analyser can guess at whether a PRG is a cartridge or an ordinary program. 2016-08-27 18:26:51 -04:00
Thomas Harte
a1b3a18d11 Started forcing a resolution on ROMs by doing. But have immediately misstepped. Rename coming momentarily... 2016-08-27 18:17:40 -04:00
Thomas Harte
82c8459055 Minor tidying of namespace usage declarations. 2016-08-27 17:18:12 -04:00
Thomas Harte
56c0d70c1f Gave disks their own namespace. 2016-08-27 17:15:09 -04:00
Thomas Harte
c0402d0c2b Gave tapes their own namespace. 2016-08-27 17:09:45 -04:00
Thomas Harte
8c333059a8 Turning this into a slog: gave UEF a more appropriate name, got as far as now having to decide what to do about ROMs as to structure. I guess they're machine specific, so specific classes? 2016-08-27 16:40:21 -04:00
Thomas Harte
55ada536ac Added a test call, further mutated result structure. 2016-08-27 14:25:16 -04:00
Thomas Harte
e68ff64045 Actually, this is less prescriptive. 2016-08-27 13:42:51 -04:00
Thomas Harte
1aebb4ea03 Merge remote-tracking branch 'origin/master' into FasterLoading 2016-08-24 20:52:10 -04:00
Thomas Harte
2f470843e2 Update README.md
Extended discussion, fixed sentence structure.
2016-08-24 09:21:01 -04:00
Thomas Harte
b3ae582c76 Update README.md
Fixed number list.
2016-08-24 09:19:26 -04:00
Thomas Harte
f170991c78 Update README.md
Produced a more philosophical rewrite.
2016-08-24 09:18:35 -04:00
Thomas Harte
5ffd9e4f0d This is probably how the static analyser interface will look? 2016-08-23 21:35:59 -04:00
Thomas Harte
0d077691b0 Resolved warning. 2016-08-23 21:10:22 -04:00
Thomas Harte
dab3580111 Experimental: can I afford a lower sampling rate if there's a low-pass filter in effect? 2016-08-22 22:18:05 -04:00
Thomas Harte
f937e08c91 Merge pull request #47 from TomHarte/PALAudioFrequency
Corrects Vic audio output (i) in PAL mode; and (ii) generally as concerns all but the highest-frequency channel
2016-08-21 20:45:09 -04:00
Thomas Harte
1541273785 Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately. 2016-08-21 18:13:31 -04:00
Thomas Harte
c783090980 It turns out that the Vic has a 1.6Khz low-pass filter. So added that. 2016-08-21 12:13:41 -04:00
Thomas Harte
8d839c5278 I think this is correct. And have explained why. 2016-08-20 16:54:43 -04:00
Thomas Harte
7c9455251d Fixed reload for the lower-frequency audio channels. 2016-08-19 17:34:01 -04:00
Thomas Harte
99157ad6b2 Ensured the 6560 knows its real audio clock on a PAL machine; removed some stray semicolons. 2016-08-19 13:35:34 -04:00
Thomas Harte
e985c72ce8 Removed a dead special case. 2016-08-19 12:23:06 -04:00
Thomas Harte
0cf3e25dd0 Merge pull request #46 from TomHarte/PRGTape
Adjusts non-ROM PRG loading to be via the tape interface
2016-08-19 12:20:11 -04:00
Thomas Harte
73ce67bee8 Added some documentation of the intention here. 2016-08-19 11:04:59 -04:00
Thomas Harte
4edd1214f1 This has now successfully loaded its first PRG-as-a-tape. 2016-08-19 10:58:42 -04:00
Thomas Harte
902c0f967a Implements known phase pattern for PAL output. 2016-08-17 08:09:48 -04:00
Thomas Harte
2935848f35 Adopted header/header/data/data pattern. But still not complete joy. 2016-08-17 08:03:34 -04:00
Thomas Harte
e5523dbbed This gets through loading the first(/only?) copy. I tried repeating it with a bit-flipped header, now I'm trying repeating the header with a different file type. More documentation searching to do, I guess. 2016-08-16 22:17:08 -04:00
Thomas Harte
1bca9aa2bb Fixed parity: now calculated from the actual byte and works the other way around. The Vic now believes it is loading the actual program. So I guess bytes, headers and the lead-in is working. 2016-08-16 21:41:09 -04:00
Thomas Harte
dfe9fb83ef This proves that bytes are being deposited properly. For the first 36 anyway, and with no announcement. 2016-08-16 21:09:50 -04:00
Thomas Harte
12f8aff65b 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. 2016-08-16 19:46:53 -04:00
Thomas Harte
3a23d5d8cf Adjusted the check digit. 2016-08-15 22:44:36 -04:00
Thomas Harte
dbe47f3f45 I've obviously misunderstood something as, as far as I'm concerned, this should at least get me a 'LOADING'. 2016-08-15 22:40:05 -04:00
Thomas Harte
7994148f55 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. 2016-08-15 22:10:53 -04:00
Thomas Harte
7e2b4554ea This likely forms the Commodore dipoles correctly. It just stays stuck in leader tone forever is all. 2016-08-15 20:08:50 -04:00
Thomas Harte
ca2dc6b6c4 Ensured ROMs survive in the new memory model. 2016-08-15 19:56:01 -04:00
Thomas Harte
38aec44d85 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? 2016-08-15 19:44:41 -04:00
Thomas Harte
3aa40212f3 Fixed minor documentation error; admitted that this class didn't invent the idea of a pulse. 2016-08-15 19:37:21 -04:00
Thomas Harte
e59301b416 Merge pull request #45 from TomHarte/MemoryModels
Vic: Adds support for expanded memory and PAL region machines.
2016-08-14 20:01:19 -04:00
Thomas Harte
547aefb696 Slightly adjusted PRG strategy, made a note about where next. 2016-08-14 16:36:42 -04:00
Thomas Harte
6079d30e58 Eliminated waiting here — either the buffer can be enqueued now or it is dropped. 2016-08-14 16:20:24 -04:00
Thomas Harte
48a00d9e05 ... which means that all files are now expected. 2016-08-14 14:24:03 -04:00
Thomas Harte
5373f6cc57 Completed setting of options, including mapping from country to ROM + television standard. 2016-08-14 14:23:08 -04:00
Thomas Harte
b5af1746d5 Added a through path to the Objective-C for setting region and memory size. 2016-08-14 14:14:59 -04:00
Thomas Harte
f15d89239f Made a stab at storage and restoration of country and memory size. 2016-08-14 14:00:08 -04:00
Thomas Harte
df77c2a20a Added the XIB side of wiring for region and memory size options. 2016-08-14 13:53:14 -04:00
Thomas Harte
d9016909ed Added some wiring for PAL/NTSC mode switching on the Vic, making an attempt to simplify the whole loop of having different clock rates. 2016-08-14 13:33:20 -04:00