178 Commits

Author	SHA1	Message	Date
Thomas Harte	c5ec9ae171	Adjust MDA clock; it's slightly slower than my guess.	2023-12-05 22:31:37 -05:00
Thomas Harte	5576588c2d	Fix drive enables, go back to FF for non-existent ports.	2023-12-05 22:02:41 -05:00
Thomas Harte	fd8afb6668	Devolve memory location and font ROM decision.	2023-12-05 16:46:39 -05:00
Thomas Harte	bdf9c4765b	Loosen the assumption of MDA.	2023-12-05 16:38:09 -05:00
Thomas Harte	6659a1dec5	Exit on EOP.	2023-12-05 15:37:25 -05:00
Thomas Harte	23c60ae9bc	Supply video adaptor type.	2023-12-05 15:19:58 -05:00
Thomas Harte	4265455c31	Unify DMA interface.	2023-12-05 14:52:14 -05:00
Thomas Harte	0bcb17985b	Eliminate further warnings.	2023-12-05 14:44:20 -05:00
Thomas Harte	9601c69e12	Implement blinking text.	2023-12-04 22:02:38 -05:00
Thomas Harte	9f65587a1d	Correct scan status scaling; rearrange FDC marginally.	2023-12-04 21:46:03 -05:00
Thomas Harte	b0d1dedb65	Support MDA control: display enable.	2023-12-04 16:34:46 -05:00
Thomas Harte	bf8a4b7efe	Ensure sector cache is cleared upon disk change.	2023-12-04 12:28:29 -05:00
Thomas Harte	edef0732ac	Avoid potential infinite read loops.	2023-12-04 12:19:21 -05:00
Thomas Harte	0d7646d42a	Add a cursor-type template parameter.	2023-12-04 09:45:32 -05:00
Thomas Harte	37c46d579d	Add missing array imports.	2023-12-03 18:06:09 -05:00
Thomas Harte	4957ae7de1	Support cursor at point of output.	2023-12-02 22:44:26 -05:00
Thomas Harte	e77f4457c2	Map various missing keys.	2023-12-02 22:40:05 -05:00
Thomas Harte	c6b989d85b	Add an input queue, to avoid key drops.	2023-12-02 22:29:49 -05:00
Thomas Harte	92913b7455	Fix mapping of Z.	2023-12-02 18:46:22 -05:00
Thomas Harte	208846a166	Attempt proper EOP semantics; multisector reads.	2023-12-02 18:38:26 -05:00
Thomas Harte	c31ee968df	TC: start tending towards meaning.	2023-12-02 15:24:47 -05:00
Thomas Harte	aa15fd1fff	Comment more.	2023-12-02 00:00:44 -05:00
Thomas Harte	691d1cce9e	Simplify and fix track caching.	2023-12-01 23:35:11 -05:00
Thomas Harte	7072a1661c	Flag floppy as present.	2023-12-01 22:44:21 -05:00
Thomas Harte	bc89cb7d06	Hack attack: ignore TC.	2023-12-01 17:30:32 -05:00
Thomas Harte	33a0c40c02	Support HLT.	2023-12-01 13:15:01 -05:00
Thomas Harte	365b62b4a7	Add TODO.	2023-12-01 09:50:11 -05:00
Thomas Harte	4d1e976b55	Flag drive as interrupting.	2023-12-01 09:49:50 -05:00
Thomas Harte	4429448815	Make some effort at terminating appropriate if no sector.	2023-12-01 09:47:52 -05:00
Thomas Harte	88e67d9ad6	Return some status after reading. Seemingly wrong.	2023-12-01 09:37:30 -05:00
Thomas Harte	d101483714	Hack in enough that disk contents end up in RAM.	2023-12-01 09:34:31 -05:00
Thomas Harte	5feac8ef14	Avoid duplicate symbol.	2023-12-01 07:36:12 -05:00
Thomas Harte	a96cb1ebd6	Decommit debugging hook.	2023-12-01 06:46:00 -05:00
Thomas Harte	2da2240d34	Remove errant break.	2023-12-01 06:45:29 -05:00
Thomas Harte	ef37b09a78	Seed all transfers as complete.	2023-11-30 22:47:38 -05:00
Thomas Harte	9fc0d411fd	Further flesh out DMA, breaking POST.	2023-11-30 22:45:40 -05:00
Thomas Harte	0dc44e8efd	Adjust audio formulation. ... Probably still not right, but less wrong with the current input.	2023-11-30 14:37:13 -05:00
Thomas Harte	c076636df1	Fix typo.	2023-11-30 14:26:26 -05:00
Thomas Harte	c397da3e5a	Add TODOs.	2023-11-30 12:52:08 -05:00
Thomas Harte	5f6bbec741	Capture DMA high bytes, add actor for accesses.	2023-11-30 12:47:50 -05:00
Thomas Harte	7f0bb716f7	Grab sector contents, ready for more FDC work.	2023-11-29 15:55:37 -05:00
Thomas Harte	b7d3633b38	Log slightly more.	2023-11-29 15:30:47 -05:00
Thomas Harte	05504c8389	Accept and keep hold of disk images.	2023-11-29 15:20:14 -05:00
Thomas Harte	8d01829fa7	Adopt PC-style naming, limit to one drive.	2023-11-29 11:35:21 -05:00
Thomas Harte	be842ee2f1	Add drive indicator lights.	2023-11-29 11:31:37 -05:00
Thomas Harte	e034daa6c8	Capture motor state.	2023-11-29 09:52:16 -05:00
Thomas Harte	ce4bcf9064	Improve comment.	2023-11-29 09:50:08 -05:00
Thomas Harte	a992ae37b1	Mildly rearrange, to match enum order.	2023-11-29 09:49:15 -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
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	dd4bcf68bf	Load up on debugging logs.	2023-11-28 15:09:57 -05:00
Thomas Harte	b860fba0a3	Make an attempt at providing varied sense interrupt statuses.	2023-11-28 14:12:39 -05:00
Thomas Harte	c19c356c10	Add disabled longer serialisation.	2023-11-27 23:23:00 -05:00
Thomas Harte	8fec9bef11	Attempt IRQ logic.	2023-11-27 23:16:24 -05:00
Thomas Harte	bffe3ffa25	Add an 8272 results phase.	2023-11-27 23:05:37 -05:00
Thomas Harte	291723e85e	Insert notes to self, trying to tie down FloppyController interface.	2023-11-27 10:27:36 -05:00
Thomas Harte	a6a464c240	Add printed TODO.	2023-11-25 21:40:13 -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	8c70317d31	Introduce interrupt.	2023-11-24 23:06:52 -05:00
Thomas Harte	dd135bf3fe	Start experimenting with a possible end-of-reset interrupt?	2023-11-24 22:41:33 -05:00
Thomas Harte	2efb5236f7	Add an agent for floppy control.	2023-11-24 22:19:39 -05:00
Thomas Harte	d5c30e3175	Add enough keyboard support to be able to bypass the initial FDC BIOS failure report.	2023-11-24 13:38:06 -05:00
Thomas Harte	89423f28ef	Limit extraneous printing.	2023-11-23 22:47:31 -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	e0f72f2048	Tidy up.	2023-11-22 14:18:58 -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	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	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	6329a1208a	Adopt PIT-centric timing.	2023-11-21 22:02:24 -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
Thomas Harte	18ddc2c83a	Route traffic.	2023-11-20 15:11:22 -05:00