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Author SHA1 Message Date
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
b07cc5c2ec
Merge pull request #1219 from TomHarte/68000TemplatedPerform 
Sometimes provide 68000 bus operations at compile time.
 2023-11-27 21:54:24 -05:00
Thomas Harte
36a4629ce0 Explain new semantics. 2023-11-27 21:49:57 -05:00
Thomas Harte
87eec47b79 Mildly reduce cost of 8-byte ROM overlay. 2023-11-27 15:48:30 -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
5c7f94d2ef Introduce the possibility of operation type as a template parameter. 
It's already proven possible to provide this for instruction fetch, so I think it'll immediately be a win. But more importantly it opens a path forwards for further improvement.
 2023-11-27 11:48:34 -05:00
Thomas Harte
ed31cfd80a
Merge pull request #1216 from TomHarte/ReduceNoise 
Limit extraneous printing.
 2023-11-23 23:05:46 -05:00
Thomas Harte
89423f28ef Limit extraneous printing. 2023-11-23 22:47:31 -05:00
Thomas Harte
593c32f621
Merge pull request #1215 from TomHarte/PCKeyboard 
Attempt to implement the XT keyboard controller.
 2023-11-23 22:26:09 -05:00
Thomas Harte
019d987623 Clear buffer on read. 2023-11-23 22:16:08 -05:00
Thomas Harte
7e8020df59 Avoid a spurious initial interrupt. 2023-11-23 22:15:20 -05:00
Thomas Harte
44d602e0f6 Seriously attempt a keyboard controller. 2023-11-23 22:10:51 -05:00
Thomas Harte
0674da0325 Flip IRQ priority. 2023-11-23 15:41:24 -05:00
Thomas Harte
113fc9f757 Add further TODO. 2023-11-23 15:29:43 -05:00
Thomas Harte
2c31452629 Add TODO, as exposition. 2023-11-23 15:19:31 -05:00
Thomas Harte
505df78108 Add column duplication, switch to green. 2023-11-23 15:18:28 -05:00
Thomas Harte
d92d0e87ac Honour MDA attributes. 2023-11-23 14:51:32 -05:00
Thomas Harte
df9e9c2c4d Start accumulating notes. 2023-11-22 15:21:45 -05:00
Thomas Harte
b3c07b76ee
Merge pull request #1214 from TomHarte/MDAOutput 
Add basic MDA text output.
 2023-11-22 15:04:21 -05:00
Thomas Harte
e0f72f2048 Tidy up. 2023-11-22 14:18:58 -05:00
Thomas Harte
825f3184eb Explain provenance. 2023-11-22 14:18:50 -05:00
Thomas Harte
a293a3a816 Document the future. 2023-11-22 14:14:53 -05:00
Thomas Harte
b22b489380 Mask into 4kb; I don't know whether hardware scrolling is in use. 2023-11-22 14:12:57 -05:00
Thomas Harte
231de8440e Add text display. 2023-11-22 14:11:22 -05:00
Thomas Harte
8993a9c4c1 Import MDA font. 2023-11-22 14:04:26 -05:00
Thomas Harte
381537fde9 Get as far as MDA being able to fetch. 2023-11-22 13:52:28 -05:00
Thomas Harte
f249e4ada6 Maintain an actual pixel buffer. 2023-11-22 13:40:50 -05:00
Thomas Harte
12179e486f Create a solid white rectangle. 2023-11-22 13:18:39 -05:00
Thomas Harte
80b2ccd418 Attempt to wire in a CRTC. 2023-11-22 12:53:09 -05:00
Thomas Harte
2af6259963
Merge pull request #1213 from TomHarte/PITClock 
Standardise on the PIT clock as the definition of time.
 2023-11-21 22:51:14 -05:00
Thomas Harte
24d0caf8e7 Fix Swift conditionality. 2023-11-21 22:48:26 -05:00
Thomas Harte
1828a10885 Use less branchy inner loop. 2023-11-21 22:42:53 -05:00
Thomas Harte
bcd4a2216a Improve clocking. 2023-11-21 22:36:11 -05:00
Thomas Harte
3da3401125 Attempt full audio output. 2023-11-21 22:28:33 -05:00
Thomas Harte
972d1d1ddd Add audio pipeline. 2023-11-21 22:11:32 -05:00
Thomas Harte
0344af986c Try to avoid having to edit this constantly. 2023-11-21 22:02:36 -05:00
Thomas Harte
6329a1208a Adopt PIT-centric timing. 2023-11-21 22:02:24 -05:00
Thomas Harte
c11d3b61d6
Merge pull request #1209 from TomHarte/SupportChipsAplenty 
Add various other PC chips into the mix.
 2023-11-21 21:53:29 -05:00
Thomas Harte
375a9f9ff5 Pull out the PIC, DMA. 2023-11-21 15:50:38 -05:00
Thomas Harte
a1e118a1ff Do some interrupt work. 2023-11-21 15:46:31 -05:00
Thomas Harte
83ca9b3af5 Hack in some MDA text logging. Boot seems to complete? 2023-11-21 11:37:36 -05:00
Thomas Harte
acdf32e820 Handle low/high switches. 2023-11-21 11:25:53 -05:00
Thomas Harte
931e6e7a56 Add, disable, logging detritus. 2023-11-21 11:19:47 -05:00
Thomas Harte
058080f6de Prove to my caveman self that no text is being written. 2023-11-20 23:11:27 -05:00
Thomas Harte
c4e9f75709 Edge towards but don't quite reach interrupt. 2023-11-20 22:52:20 -05:00
Thomas Harte
695282b838 PIT output now reaches the PIC. 2023-11-20 22:36:05 -05:00
Thomas Harte
f0e2ef5e28 Attempt to implement square-wave mode. 2023-11-20 22:19:18 -05:00
Thomas Harte
ee6012f6e9 Evict the PIT. 2023-11-20 19:00:16 -05:00
Thomas Harte
d3e90ce006 Capture some basics. 
BIOS now seems to get as far as expecting channel 0 to trigger an interrupt, which never comes.
 2023-11-20 15:36:52 -05:00