409 Commits

Author	SHA1	Message	Date
Thomas Harte	8041b87317	Introduce segment preauthorisation.	2025-05-18 22:11:23 -04:00
Thomas Harte	b3000f6350	Made mode knowable; factor out main part of far jump.	2025-05-17 23:08:07 -04:00
Thomas Harte	159f3cb780	Add SLDT.	2025-05-12 23:17:34 -04:00
Thomas Harte	61469f8e09	Reindent to avoid many false warnings.	2025-05-12 21:36:49 -04:00
Thomas Harte	82caee6d7d	Add potential LLDT exceptions.	2025-05-12 17:31:56 -04:00
Thomas Harte	275e75980c	Take initial swing at LLDT.	2025-05-12 17:22:11 -04:00
Thomas Harte	2572da872a	Improve consts, use concepts, reduce indentation.	2025-05-12 09:13:27 -04:00
Thomas Harte	0d34960d60	Properly place ownership of linear authorisation.	2025-05-11 21:36:36 -04:00
Thomas Harte	b0d4bcd26c	Route all authorisation messages to a common receiver.	2025-05-11 21:08:02 -04:00
Thomas Harte	8c9df5556d	Generalise support for multiple speeds.	2025-05-05 22:55:23 -04:00
Thomas Harte	32495f47b3	Bifurcate descriptor types.	2025-05-05 17:26:39 -04:00
Thomas Harte	fa2cc0f62e	Proceed as far as believing I probably need a gate descriptor type.	2025-05-04 22:11:53 -04:00
Thomas Harte	a686a167cc	Factor out 'read descriptor'.	2025-05-04 21:03:17 -04:00
Thomas Harte	8a2468a4fb	Apply IDT reset condition, factor in to real-mode interrupts.	2025-05-04 16:57:14 -04:00
Thomas Harte	4cc21a2c20	Include descriptor table and MSW requirements.	2025-05-03 23:01:31 -04:00
Thomas Harte	0a60e38d82	Abandon Interrupt naming.	2025-05-02 10:23:20 -04:00
Thomas Harte	f53b40e127	Focus on an Exception as the interrupt token.	2025-05-01 22:36:58 -04:00
Thomas Harte	213bd09a9c	Remove test trap.	2025-04-23 11:36:29 -04:00
Thomas Harte	4cd57856ce	Take ownership of 32-bit assumption.	2025-04-22 21:10:20 -04:00
Thomas Harte	7de23ec2aa	Be specific about types.	2025-04-21 23:03:57 -04:00
Thomas Harte	fbd81b9930	Merge branch 'master' into Descriptors	2025-04-21 22:43:30 -04:00
Thomas Harte	f41629daae	Add compiler-calming fallthroughs.	2025-04-20 22:19:11 -04:00
Thomas Harte	3e4eaee96b	Overtly cast.	2025-04-20 12:27:38 -07:00
Thomas Harte	7721f74200	Further flesh out descriptors: decode all bits, add printf warnings.	2025-04-10 17:07:45 -04:00
Thomas Harte	fa58cc05f3	Attempt to avoid type punning.	2025-04-06 22:48:22 -04:00
Thomas Harte	c61a9e47b2	Slightly tweak constness.	2025-04-06 22:40:29 -04:00
Thomas Harte	8ccec81cc6	Disable awaiting_eoi_.	2025-04-06 22:24:25 -04:00
Thomas Harte	668901f71d	Fix comparison.	2025-04-06 22:24:09 -04:00
Thomas Harte	ad6ad144a5	Don't regress PC for external interrupts.	2025-04-05 21:39:37 -04:00
Thomas Harte	d5997a30b2	Reset output on latch write in applicable modes.	2025-04-04 12:30:08 -04:00
Thomas Harte	ecc7501377	Avoid explicit instantiation, precedence error.	2025-04-03 22:09:49 -04:00
Thomas Harte	45262a1a46	Copy reload value to latch.	2025-04-03 21:59:26 -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	7c7675179e	Restrict shift operand size, causing text output at last.	2025-04-03 17:42:15 -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	0c88e62815	Add various caveman debugging comments.	2025-04-02 23:28:20 -04:00
Thomas Harte	88d34012c4	Continue trying to flesh out exceptions.	2025-04-02 23:27:43 -04:00
Thomas Harte	3be8de6fb0	Enforce set-only nature of protected mode bit.	2025-04-02 23:26:21 -04:00
Thomas Harte	a9a72a767d	Improve fault pathways.	2025-04-01 09:13:41 -04:00
Thomas Harte	da00e6588c	Consolidate on class.	2025-03-31 09:34:17 -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	4247da9118	Add notes to self on exceptions.	2025-03-27 18:08:09 -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	b34702e370	Set an initial A20 state.	2025-03-26 07:35:17 -04:00
Thomas Harte	8b1543d9c9	Fuzz memory, setup FS and GS.	2025-03-25 17:16:36 -04:00
Thomas Harte	e264375a97	Attempt to reintroduce 80286 support (as was).	2025-03-25 09:24:55 -04:00