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Author SHA1 Message Date
Thomas Harte
e51151e558 Adds readme related to C64 ROMs. 
Necessary for the Lorenz 6526 tests. I've no current plans to work on the C64.
 2021-07-30 21:23:12 -04:00
Thomas Harte
f576baf214 I'm not yet sure this is the best approach, but starts trying to make use of Lorenz's 6526 tests. 2021-07-30 21:21:16 -04:00
Thomas Harte
5c1ac05170 Add documentation. 2021-07-30 21:20:45 -04:00
Thomas Harte
1bae4973bc Post the serial control write onwards. 2021-07-30 18:24:27 -04:00
Thomas Harte
3d9f86c584 Begins keyboard sketches and notes. 2021-07-30 18:23:15 -04:00
Thomas Harte
3514e537ca Minor logging tweaks. 2021-07-30 18:22:59 -04:00
Thomas Harte
3d160ce85f Add another potential warning. 2021-07-30 18:21:38 -04:00
Thomas Harte
b78090ec76 Fixes IOPortsAndTimers classification. 2021-07-28 19:39:42 -04:00
Thomas Harte
759007ffc1 Attempts to route CIA interrupts. 2021-07-28 19:36:30 -04:00
Thomas Harte
37a55c3a77 Corrects 6526 interrupt control write. 
This seems to imply that the 6526 should be interrupting too.
 2021-07-28 19:26:02 -04:00
Thomas Harte
69ae9d72c8 Remove dead non-access. 2021-07-27 22:27:20 -04:00
Thomas Harte
604232acd9 Establish appropriate word-size mask. 2021-07-27 22:23:38 -04:00
Thomas Harte
82205d71cc Breaks up loop for arithmetic simplicity. 2021-07-27 21:59:27 -04:00
Thomas Harte
402eab10f8 Breaks video output while attempting to pull it into the main loop. 2021-07-27 21:33:07 -04:00
Thomas Harte
b6bf4d73ad Blitter-finished bit aside, attempts to complete the Copper. 2021-07-27 21:10:14 -04:00
Thomas Harte
5425b5c423 Adds some form of WAITing to the Copper. 2021-07-27 19:32:55 -04:00
Thomas Harte
29cd8504ca Implements enough Copper to get a first store. 2021-07-27 19:06:16 -04:00
Thomas Harte
3544746934 Modifies interface, starts on scheduler. 
Probably corrects the pixel clock, which I think was scaled up by a factor of 4.
 2021-07-27 16:41:18 -04:00
Thomas Harte
d8f814f1c4 If I'm going to push only a single colour, might as well make it fast. 2021-07-26 21:19:43 -04:00
Thomas Harte
a43175125a Assuming I'm going to keep this synchronous, extends function signature. 2021-07-26 20:13:06 -04:00
Thomas Harte
1d03bc560a Stores the colour palette, uses entry 0 as my new always output. 2021-07-26 18:59:11 -04:00
Thomas Harte
3832acf6e3 Produces a static white box, at least. 2021-07-26 18:51:01 -04:00
Thomas Harte
7894b50321 Starts towards an actual pixel output loop. 2021-07-26 18:44:20 -04:00
Thomas Harte
ffded619e6 Returns track 0 found, as a guess. 2021-07-26 18:44:01 -04:00
Thomas Harte
bcb7bb5cce Improves logging further. 
To investigate the new perpetual loop.
 2021-07-26 17:02:30 -04:00
Thomas Harte
87dcd82f69 Makes a first attempt at some sort of interrupt functionality. 2021-07-26 16:40:42 -04:00
Thomas Harte
e671cc6056 Add stubs for joystick/mouse querying. 2021-07-26 16:21:51 -04:00
Thomas Harte
5da89b88a6 Add missing space. 2021-07-25 22:17:55 -04:00
Thomas Harte
5d60c1f20b Stubs in Paula. 2021-07-25 22:16:31 -04:00
Thomas Harte
7fd00165c9 Switch to [hard-coded] PAL, for now. 
In the hope that I get to see some graphics soon, this should better conform to my expectations.
 2021-07-25 20:41:51 -04:00
Thomas Harte
34d4420e8c Correct reading of top byte of counter 2. 2021-07-25 20:41:15 -04:00
Thomas Harte
20da194fab Log slightly more accurately. 2021-07-25 19:59:24 -04:00
Thomas Harte
8d2d4c850f Revoke temporary debugging. 2021-07-25 19:59:10 -04:00
Thomas Harte
b7bed027d7 Ensures the value initially loaded to A7 is aligned. 
This is a bit of a guess; it's likely to be true though per the rule that A7 is always kept aligned.
 2021-07-25 19:55:23 -04:00
Thomas Harte
fcd6b7b0ea Takes further aim at the conters. 
I think test cases are needed, probably.
 2021-07-24 16:06:49 -04:00
Thomas Harte
ceca32ceb3 Takes a guess at one-shot mode. 2021-07-24 15:53:18 -04:00
Thomas Harte
e3bb9fc1d7 Increase logging. 2021-07-23 23:10:00 -04:00
Thomas Harte
77a8ddb95c Edges towards working counters. 2021-07-23 22:43:47 -04:00
Thomas Harte
c733a4dbf8 Beefs up interrupt awareness. 2021-07-23 21:58:52 -04:00
Thomas Harte
d898a43dff Implements time-of-day counters, provisionally. 
Interrupts to do.
 2021-07-23 21:24:07 -04:00
Thomas Harte
6216d53b1a Adds a faster flushing HalfCycles -> Cycles conversion. 2021-07-23 20:07:57 -04:00
Thomas Harte
86c30769d9 Add a divide-by-ten for the CIAs. 2021-07-23 19:25:53 -04:00
Thomas Harte
956a6dbd64 Improve commentary. 2021-07-23 19:23:54 -04:00
Thomas Harte
68fe19818e Expose more information about the E clock state. 2021-07-23 19:22:00 -04:00
Thomas Harte
de208ead4e Stubs in enough to get back into a persistent loop. 2021-07-22 22:00:53 -04:00
Thomas Harte
69d62560b4 Adds comment to avoid potential future error. 2021-07-22 22:00:33 -04:00
Thomas Harte
87d2fc1491 Adds enough raster position to return something. 2021-07-22 21:45:51 -04:00
Thomas Harte
2bc9af09e1 Factors out the chipset. 2021-07-22 21:16:23 -04:00
Thomas Harte
26f4758523 Makes a further accommodation for PermitRead/Write. 2021-07-22 21:11:25 -04:00
Thomas Harte
6123349b79 Stubs in control registers and disables exit-on-miss. 
I think I may be running up against the limits of stubbing now. Probably time to implement some stuff.
 2021-07-22 19:28:01 -04:00