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Author SHA1 Message Date
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
Thomas Harte
d1ac54fe92 Stubs in sprite containers. 2021-07-22 19:00:26 -04:00
Thomas Harte
9468adf737 Stubs in Copper addresses. 2021-07-22 18:51:23 -04:00
Thomas Harte
e85db40b0f Sketches out a blitter class. 2021-07-22 18:43:07 -04:00
Thomas Harte
b3d55cc16d Adds non-committal reads for some write-only registers. 
The hardware now proceeds to trying to talk to the Blitter. So that's next.
 2021-07-22 16:10:30 -04:00
Thomas Harte
56b62a5e49 Adds a dummy interrupt control register. 2021-07-22 16:09:32 -04:00
Thomas Harte
3ee1fc544f Fix: (1) memory base adjustment; (2) out-of-bounds writes. 2021-07-21 21:49:20 -04:00
Thomas Harte
5401744dc0 Add additional asserts. 2021-07-21 21:47:44 -04:00
Thomas Harte
fe10a10ac2 Correct address on stack upon priviliege exception. 2021-07-21 21:46:55 -04:00
Thomas Harte
ba2e5a97a9 Provisionally adds a status LED. 2021-07-19 22:31:36 -04:00
Thomas Harte
4515d1220c Switches CIA A/B byte connections; applies reset to memory map. 2021-07-19 22:17:40 -04:00
Thomas Harte
486959bce8 With minor additional logging, it appears the Amiga just keeps resetting itself. 2021-07-19 21:50:35 -04:00
Thomas Harte
e1a410bf3d Further mildly increases logging. 2021-07-19 20:54:32 -04:00
Thomas Harte
3767cc7c0b Increase logging; fix set/clear of interrupt enable mask. 2021-07-19 19:03:37 -04:00
Thomas Harte
96b0ce9ef2 Merge branch 'master' into Amiga 2021-07-18 22:16:05 -04:00
Thomas Harte
038ed0551e
Merge pull request #979 from TomHarte/Warnings 
Resolve all dangling GCC warnings.
 2021-07-18 22:15:45 -04:00
Thomas Harte
cfaf4a8a65 Add advised brackets; clarify type punning. 2021-07-18 22:11:11 -04:00
Thomas Harte
22dd8a8847 Stubs onward to a second endless loop. 2021-07-18 20:55:33 -04:00
Thomas Harte
b2ae8e7a4a Adds a type for the operation bitfield. 2021-07-18 20:54:54 -04:00
Thomas Harte
3e2bac8129 Stubs in enough to get to a permanent loop. 2021-07-18 20:25:43 -04:00
Thomas Harte
50b9d0e86d Logically, I think this should be unsigned. 2021-07-18 20:25:22 -04:00
Thomas Harte
a030d9935e Adds port input. 2021-07-18 20:25:04 -04:00
Thomas Harte
c425dec4d5 Makes some attempt to get as far as the overlay being disabled. 2021-07-18 17:17:41 -04:00
Thomas Harte
67d53601d5 Latch and return data direction. 
Albeit with no port-handling effect yet.
 2021-07-18 12:23:47 -04:00
Thomas Harte
622cca0acf Adds sufficient address decoding to print a more helpful exit message. 2021-07-18 12:13:56 -04:00
Thomas Harte
48999c03a5 Adds concept of time, captured port handler. 2021-07-18 11:49:10 -04:00
Thomas Harte
377cc7bdcd Start to introduce a 6526/8250. 2021-07-18 11:36:13 -04:00
Thomas Harte
a5d0976c2d Eliminate unused #includes. 2021-07-18 11:35:57 -04:00
Thomas Harte
ae05010255 Improve indentation. 2021-07-18 11:29:26 -04:00
Thomas Harte
66cacbd0e0 Be overt about the type being supplied. 2021-07-18 11:28:18 -04:00