01cf7462d5
Disk II: Don't overwrite data bus when not asked to
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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
e9420fc48d
Merge pull request #1245 from TomHarte/MDANoCursor
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MDA: implement no cursor, blink attribute.
2023-12-04 22:10:12 -05:00
9601c69e12
Implement blinking text.
2023-12-04 22:02:38 -05:00
790e744bde
Merge pull request #1239 from ryandesign/sense-write-protect
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Fix Disk II sense-write-protect clocking preference
2023-12-04 21:47:26 -05:00
8103f8e682
Switch interpretation to support cursor on/off.
2023-12-04 15:54:56 -05:00
b91a791e01
Fix Disk II sense-write-protect clocking preference
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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
646c6b08f7
Make cursor blink.
2023-12-04 09:52:46 -05:00
0d7646d42a
Add a cursor-type template parameter.
2023-12-04 09:45:32 -05:00
ab608178f3
Consider Disk II state machine state C to be a NOP
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Continuation of #1224
2023-12-04 08:13:32 -06:00
5d8666b837
Enable the cursor signal; no blink action yet.
2023-12-03 17:57:19 -05:00
66b95a8b54
Merge pull request #1217 from TomHarte/PCFDC
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Sketch the outline of a high-level emulation of the PC FDC
2023-11-29 12:48:55 -05:00
439104c73a
Add missing space.
2023-11-29 09:49:05 -05:00
fbbe3ab7f1
Include seek ended flag.
2023-11-29 09:45:45 -05:00
6e2e67fd46
Sculpt out enough to get to a read data command.
2023-11-29 09:42:43 -05:00
3293ab48ce
Handle C, E, F operations in Disk II state machine
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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
3827a084ad
Code to GlaBIOS expectations.
2023-11-28 23:18:22 -05:00
301442a0b1
Fix meaning of flag, use correctly.
2023-11-28 22:34:34 -05:00
b860fba0a3
Make an attempt at providing varied sense interrupt statuses.
2023-11-28 14:12:39 -05:00
bffe3ffa25
Add an 8272 results phase.
2023-11-27 23:05:37 -05:00
993366ac5a
Merge branch 'master' into PCFDC
2023-11-27 22:16:30 -05:00
2a0375e9c2
Mildly adjust layout of inner loop.
2023-11-27 15:16:22 -05:00
032eeb4757
Eliminate runtime switch.
2023-11-27 14:57:41 -05:00
d2203484cc
Avoid name duplication.
2023-11-26 15:29:08 -05:00
003c494aac
Factor out a large number of status-related facts.
2023-11-26 15:04:10 -05:00
9bd75464b5
Proceed to receiving a sense interrupt status.
2023-11-25 18:15:37 -05:00
0bb048e24b
Start formalising/extracting 8272 status.
2023-11-25 18:10:49 -05:00
af70c8847d
Factor out the stuff of accumulating and dissecting commands.
2023-11-24 18:24:58 -05:00
8efb6a9226
Simplify 'get_next_sequence_point' -> 'next_sequence_point'.
2023-09-10 18:00:49 -04:00
40d5bd4e58
Switch to purposive name.
2023-05-19 14:22:22 -04:00
c75efb7dac
Also allow for a potential Grauw conversion in Yamaha land.
2023-05-19 13:43:28 -04:00
d117a44069
Allow for potential Grauw offset in TMS and SMS.
2023-05-19 11:46:49 -04:00
dc425a03d3
Partially resolve.
2023-05-18 16:55:17 -04:00
ce8bd011d7
Add commentary, and TODOs.
2023-05-18 16:50:46 -04:00
c76048bff9
Formalise the idea of Grauw as a separate clock.
2023-05-18 16:37:48 -04:00
4cb7abe13d
Update old comment.
2023-05-18 16:28:05 -04:00
5c51bae605
Remove unused variable.
2023-05-16 16:46:36 -04:00
8578dfbf22
Eliminate various other errant spaces.
2023-05-16 16:40:09 -04:00
f821b60430
Remove stray space.
2023-05-16 16:16:10 -04:00
8ca0d9e13a
Add a hook for when I think mode latching should occur.
2023-05-16 16:14:37 -04:00
3014c957e7
Relocate Yamaha line interrupt.
2023-05-16 13:01:23 -04:00
a1a7c0e253
Apply maybe_unused judiciously.
2023-05-15 10:17:04 -04:00
50343dec43
Eliminate all whitespace-only lines.
2023-05-12 14:16:39 -04:00
28c79b2885
Eliminate redundant [space][tab] pairs.
2023-05-12 14:14:45 -04:00
56de9c418f
Improve comments.
2023-05-12 13:59:52 -04:00
5bcb5fb832
Also sever command-engine state.
2023-05-12 13:57:50 -04:00
abeb361441
Gift all generators to YamahaFetcher.
2023-05-12 13:54:07 -04:00
f9cc2013a8
Start to cleave off Yamaha fetch tables.
2023-05-12 13:49:53 -04:00
e7c40eead9
Have Fetch and Draw be overt about namespaces.
2023-05-12 13:46:35 -04:00
c29d80006e
Start to organise.
2023-05-12 13:33:02 -04:00
596661bfbe
Remove errant newline.
2023-05-12 13:25:11 -04:00
Ryan Carsten Schmidt
Thomas Harte
Thomas Harte