208 Commits

Author	SHA1	Message	Date
Thomas Harte	7de23ec2aa	Be specific about types.	2025-04-21 23:03:57 -04:00
Thomas Harte	ad6ad144a5	Don't regress PC for external interrupts.	2025-04-05 21:39:37 -04:00
Thomas Harte	ecc7501377	Avoid explicit instantiation, precedence error.	2025-04-03 22:09:49 -04:00
Thomas Harte	3c04e08df2	Ensure 16-bit ins and outs always occur as two 8-bit operations. ... Advances the AT to system error 108, something about timer 2.	2025-04-03 19:52:40 -04:00
Thomas Harte	88ed49a833	Enable A20 at reset; fully propagate return to real mode.	2025-04-03 16:14:49 -04:00
Thomas Harte	88d34012c4	Continue trying to flesh out exceptions.	2025-04-02 23:27:43 -04:00
Thomas Harte	a9a72a767d	Improve fault pathways.	2025-04-01 09:13:41 -04:00
Thomas Harte	ec7e343673	Start to establish throw/catch of 80286 exceptions.	2025-03-30 13:23:36 -04:00
Thomas Harte	69d4d8acb0	Switch to construct and copy.	2025-03-29 17:27:29 -04:00
Thomas Harte	a7eab8df22	Add getter for local descriptor table.	2025-03-29 17:24:30 -04:00
Thomas Harte	db26a26926	Fix decoding of PUSH immediate.	2025-03-27 13:07:13 -04:00
Thomas Harte	1551fbeb1f	Make some stab at descriptor fetch.	2025-03-27 12:50:50 -04:00
Thomas Harte	d5c53ca624	Set A20 line properly.	2025-03-26 21:51:43 -04:00
Thomas Harte	e264375a97	Attempt to reintroduce 80286 support (as was).	2025-03-25 09:24:55 -04:00
Thomas Harte	fd31d07f41	Begin division of memory into linear and segmented mappings.	2025-03-24 22:58:19 -04:00
Thomas Harte	fac15f5539	Introduce a linear-memory holder.	2025-03-24 21:23:08 -04:00
Thomas Harte	6ad88101f1	Saunter up to a circular issue: segments needs memory access.	2025-03-24 17:31:17 -04:00
Thomas Harte	c1d2c159f3	Reenable backdoor AT.	2025-03-21 11:22:09 -04:00
Thomas Harte	48d8fdb875	Adopt descriptors in memory handling.	2025-03-21 10:18:26 -04:00
Thomas Harte	4ca47be8a8	Add const.	2025-03-15 22:21:35 -04:00
Thomas Harte	f9d9dc68b7	Factor out BIOS installation.	2025-03-15 22:19:26 -04:00
Thomas Harte	97d237eed0	Support real IBM BIOS, either in odd/even or complete form.	2025-03-15 21:13:31 -04:00
Thomas Harte	13b32b269c	Force the AT in debug mode only.	2025-03-12 12:47:04 -04:00
Thomas Harte	592cea6a27	Tweak timing to once again pass BIOS controller test.	2025-03-12 12:31:29 -04:00
Thomas Harte	98f20c57c1	Attempt to support reset-by-8042, resulting in boot loop.	2025-03-08 00:47:56 -05:00
Thomas Harte	4e882e7d4d	Accept uint8_ts only.	2025-03-07 23:36:47 -05:00
Thomas Harte	d7b46ee03c	Adopt compact form.	2025-03-07 14:23:50 -05:00
Thomas Harte	2c165c3873	Avoid repetition of 'PC'.	2025-03-07 13:44:49 -05:00
Thomas Harte	9135402d9e	Extract keyboard controller.	2025-03-07 13:43:21 -05:00
Thomas Harte	53135ec2c0	Extract floppy controller, speaker.	2025-03-07 13:39:45 -05:00
Thomas Harte	7d84d6909e	Add TODO.	2025-03-06 22:16:51 -05:00
Thomas Harte	9224645473	Add second PIC.	2025-03-06 22:15:58 -05:00
Thomas Harte	6717771f9a	Rejig doubling of DMA controllers.	2025-03-05 23:02:08 -05:00
Thomas Harte	99e0902b74	Reconnect speaker.	2025-03-05 21:51:50 -05:00
Thomas Harte	c7f2805b05	Install the AT keyboard controller.	2025-03-05 21:28:22 -05:00
Thomas Harte	6e1909647b	Reformat; hatch separate AT keyboard controller; print POST codes.	2025-03-05 21:08:53 -05:00
Thomas Harte	53a8f65ecc	Merge branch 'master' into FurtherATDMA	2025-03-05 16:03:46 -05:00
Thomas Harte	82419e6df1	Revoke 'ForceAT', **again**.	2025-03-05 14:34:44 -05:00
Thomas Harte	faa76ee017	Not quite accurate, but segment out keyboard writes for the AT.	2025-03-05 14:33:55 -05:00
Thomas Harte	ba7b1c47b9	Improve constness, reduce trips to system clock.	2025-03-05 14:17:31 -05:00
Thomas Harte	367c2b568a	Attempt to offer expanded DMA top bytes.	2025-03-04 22:51:17 -05:00
Thomas Harte	cacacc00f6	Undo ForceAT.	2025-03-04 20:56:38 -05:00
Thomas Harte	1b94cfc72c	Add nullptr backstop.	2025-03-04 20:46:10 -05:00
Thomas Harte	89fd41124f	Template various bits of hardware on machine type.	2025-03-04 17:08:49 -05:00
Thomas Harte	4e3b0ae3c1	Resolve type warnings in ENTER, spurious new lines in PC.	2025-03-04 14:10:28 -05:00
Thomas Harte	9df6d535e2	Patch up enough to get an 80286 performer compilable.	2025-03-04 13:52:02 -05:00
Thomas Harte	71b481d3be	Bake PC model into template.	2025-03-04 11:45:56 -05:00
Thomas Harte	2710acaae6	Avoid repeating CPU model, normalise member names.	2025-03-04 11:35:11 -05:00
Thomas Harte	d79135ea01	Eliminate non-functional workaround.	2025-03-04 11:30:43 -05:00
Thomas Harte	805ce36592	Fix spelling, namespace.	2025-03-04 11:01:07 -05:00