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1441 Commits

Author SHA1 Message Date
Ryan Carsten Schmidt
01cf7462d5 Disk II: Don't overwrite data bus when not asked to 
Return DidNotLoad rather than 0xff from read_address on odd-numbered
addresses so that the data bus is not overwritten with 0xff on those
accesses.
 2023-12-05 10:03:52 -06:00
Thomas Harte
e9420fc48d
Merge pull request #1245 from TomHarte/MDANoCursor 
MDA: implement no cursor, blink attribute.
 2023-12-04 22:10:12 -05:00
Thomas Harte
9601c69e12 Implement blinking text. 2023-12-04 22:02:38 -05:00
Thomas Harte
790e744bde
Merge pull request #1239 from ryandesign/sense-write-protect 
Fix Disk II sense-write-protect clocking preference
 2023-12-04 21:47:26 -05:00
Thomas Harte
8103f8e682 Switch interpretation to support cursor on/off. 2023-12-04 15:54:56 -05:00
Ryan Carsten Schmidt
b91a791e01 Fix Disk II sense-write-protect clocking preference 
Ensure we're actually in the sense-write-protect loop before deciding
that we don't need to process anymore.

Closes #1218
 2023-12-04 09:19:52 -06:00
Thomas Harte
646c6b08f7 Make cursor blink. 2023-12-04 09:52:46 -05:00
Thomas Harte
0d7646d42a Add a cursor-type template parameter. 2023-12-04 09:45:32 -05:00
Ryan Carsten Schmidt
ab608178f3 Consider Disk II state machine state C to be a NOP 
Continuation of #1224
 2023-12-04 08:13:32 -06:00
Thomas Harte
5d8666b837 Enable the cursor signal; no blink action yet. 2023-12-03 17:57:19 -05:00
Thomas Harte
66b95a8b54
Merge pull request #1217 from TomHarte/PCFDC 
Sketch the outline of a high-level emulation of the PC FDC
 2023-11-29 12:48:55 -05:00
Thomas Harte
439104c73a Add missing space. 2023-11-29 09:49:05 -05:00
Thomas Harte
fbbe3ab7f1 Include seek ended flag. 2023-11-29 09:45:45 -05:00
Thomas Harte
6e2e67fd46 Sculpt out enough to get to a read data command. 2023-11-29 09:42:43 -05:00
Ryan Carsten Schmidt
3293ab48ce
Handle C, E, F operations in Disk II state machine 
This shouldn't matter since these operations are not requested by the
state machine but this is what those operations should do according to
Understanding the Apple II, Table 9.3, page 9-15.
 2023-11-29 05:50:20 -06:00
Thomas Harte
3827a084ad Code to GlaBIOS expectations. 2023-11-28 23:18:22 -05:00
Thomas Harte
301442a0b1 Fix meaning of flag, use correctly. 2023-11-28 22:34:34 -05:00
Thomas Harte
b860fba0a3 Make an attempt at providing varied sense interrupt statuses. 2023-11-28 14:12:39 -05:00
Thomas Harte
bffe3ffa25 Add an 8272 results phase. 2023-11-27 23:05:37 -05:00
Thomas Harte
993366ac5a Merge branch 'master' into PCFDC 2023-11-27 22:16:30 -05:00
Thomas Harte
2a0375e9c2 Mildly adjust layout of inner loop. 2023-11-27 15:16:22 -05:00
Thomas Harte
032eeb4757 Eliminate runtime switch. 2023-11-27 14:57:41 -05:00
Thomas Harte
d2203484cc Avoid name duplication. 2023-11-26 15:29:08 -05:00
Thomas Harte
003c494aac Factor out a large number of status-related facts. 2023-11-26 15:04:10 -05:00
Thomas Harte
9bd75464b5 Proceed to receiving a sense interrupt status. 2023-11-25 18:15:37 -05:00
Thomas Harte
0bb048e24b Start formalising/extracting 8272 status. 2023-11-25 18:10:49 -05:00
Thomas Harte
af70c8847d Factor out the stuff of accumulating and dissecting commands. 2023-11-24 18:24:58 -05:00
Thomas Harte
8efb6a9226 Simplify 'get_next_sequence_point' -> 'next_sequence_point'. 2023-09-10 18:00:49 -04:00
Thomas Harte
40d5bd4e58 Switch to purposive name. 2023-05-19 14:22:22 -04:00
Thomas Harte
c75efb7dac Also allow for a potential Grauw conversion in Yamaha land. 2023-05-19 13:43:28 -04:00
Thomas Harte
d117a44069 Allow for potential Grauw offset in TMS and SMS. 2023-05-19 11:46:49 -04:00
Thomas Harte
dc425a03d3 Partially resolve. 2023-05-18 16:55:17 -04:00
Thomas Harte
ce8bd011d7 Add commentary, and TODOs. 2023-05-18 16:50:46 -04:00
Thomas Harte
c76048bff9 Formalise the idea of Grauw as a separate clock. 2023-05-18 16:37:48 -04:00
Thomas Harte
4cb7abe13d Update old comment. 2023-05-18 16:28:05 -04:00
Thomas Harte
5c51bae605 Remove unused variable. 2023-05-16 16:46:36 -04:00
Thomas Harte
8578dfbf22 Eliminate various other errant spaces. 2023-05-16 16:40:09 -04:00
Thomas Harte
f821b60430 Remove stray space. 2023-05-16 16:16:10 -04:00
Thomas Harte
8ca0d9e13a Add a hook for when I think mode latching should occur. 2023-05-16 16:14:37 -04:00
Thomas Harte
3014c957e7 Relocate Yamaha line interrupt. 2023-05-16 13:01:23 -04:00
Thomas Harte
a1a7c0e253 Apply maybe_unused judiciously. 2023-05-15 10:17:04 -04:00
Thomas Harte
50343dec43 Eliminate all whitespace-only lines. 2023-05-12 14:16:39 -04:00
Thomas Harte
28c79b2885 Eliminate redundant [space][tab] pairs. 2023-05-12 14:14:45 -04:00
Thomas Harte
56de9c418f Improve comments. 2023-05-12 13:59:52 -04:00
Thomas Harte
5bcb5fb832 Also sever command-engine state. 2023-05-12 13:57:50 -04:00
Thomas Harte
abeb361441 Gift all generators to YamahaFetcher. 2023-05-12 13:54:07 -04:00
Thomas Harte
f9cc2013a8 Start to cleave off Yamaha fetch tables. 2023-05-12 13:49:53 -04:00
Thomas Harte
e7c40eead9 Have Fetch and Draw be overt about namespaces. 2023-05-12 13:46:35 -04:00
Thomas Harte
c29d80006e Start to organise. 2023-05-12 13:33:02 -04:00
Thomas Harte
596661bfbe Remove errant newline. 2023-05-12 13:25:11 -04:00