Thomas Harte
541b75ee6e
Further fixes PEA, and OR/AND/EOR Dn, (An).
2019-05-29 14:37:15 -04:00
Thomas Harte
77b08febdb
Corrects PEA and adds an additional debugging aid.
2019-05-29 12:47:17 -04:00
Thomas Harte
fcda376f33
Removes three further type conversion warnings.
2019-05-28 21:56:49 -04:00
Thomas Harte
0848fc7e03
Ensures the Mac uses auto vectored interrupts.
2019-05-28 16:24:41 -04:00
Thomas Harte
3bb8d6717f
Ensures A7 is correct at end of an UNLINK.
2019-05-28 16:02:42 -04:00
Thomas Harte
5e2496d59c
Simplifies and corrects MOVE logic.
2019-05-28 15:17:03 -04:00
Thomas Harte
c52da9d802
Adds some logging preparatory to a MOVE change.
2019-05-28 15:05:42 -04:00
Thomas Harte
0b999ce0e4
Attempts to fix register-relative JSRs.
2019-05-09 06:43:07 -04:00
Thomas Harte
b04bd7069d
Corrects Scc and DBcc (xxx).l and (xxx).w.
2019-05-09 06:28:55 -04:00
Thomas Harte
249b0fbb32
Corrects PC on stack after an illegal instruction.
...
Also fixed LOG_TRACE functionality.
2019-05-08 22:36:25 -04:00
Thomas Harte
d8ed8b66f3
Improves carry/extend for ROXL and ROXR.
2019-05-06 21:14:16 -04:00
Thomas Harte
e6ed50383c
Corrects PEA and MOVE.l (An)[+], (xxx).L; also adds an extra test that caught the latter.
2019-05-05 22:47:54 -04:00
Thomas Harte
417a3e1540
Adds missing call to flush.
2019-05-03 23:31:12 -04:00
Thomas Harte
fa8c804d47
Makes explicit a few implicit type conversions.
...
There's plenty more down this well, alas.
2019-05-03 23:26:03 -04:00
Thomas Harte
2c9a1f7b16
Restores vector.
2019-05-03 14:50:07 -04:00
Thomas Harte
0ea4c1ac80
Evicts #includes from my namespace.
2019-05-03 14:48:39 -04:00
Thomas Harte
a873ec97eb
Also previously missing: vector.h.
2019-05-03 14:43:31 -04:00
Thomas Harte
cc8a65780e
Adds further missing includes.
2019-05-03 14:42:36 -04:00
Thomas Harte
c117deb43b
Introduces a couple of missing #includes.
2019-05-03 14:37:05 -04:00
Thomas Harte
a0eb20ff1f
Tweaks divide-by-zero timing.
2019-05-03 14:29:36 -04:00
Thomas Harte
291e91375f
Takes a shot at the synchronous bus.
2019-05-03 14:20:59 -04:00
Thomas Harte
857f74b320
Fixed: the accepted interrupt level now appears on the bus.
2019-05-02 15:47:12 -04:00
Thomas Harte
1d9608efc7
Alters the order of interrupt bus activity, to bring it into line with a real 68000.
2019-05-02 15:25:43 -04:00
Thomas Harte
93616a4903
Completes test of a vectored interrupt.
...
Correcting issues uncovered.
2019-05-02 00:00:09 -04:00
Thomas Harte
bb07206c55
Corrects internet response to work as currently implemented.
...
Also makes corrections to the bus error and address error exceptions.
2019-05-01 21:59:06 -04:00
Thomas Harte
2e5c0811e7
Makes some effort at getting into interrupt processing.
2019-05-01 15:26:36 -04:00
Thomas Harte
f6ac407e4d
Takes further steps towards supporting interrupts.
...
Specifically:
* introduces the necessary bus signalling; and
* adds corresponding functional steps.
Still to figure out: getting into and out of an interrupt cycle.
2019-05-01 15:19:24 -04:00
Thomas Harte
078c3135df
The 5/3 split of microcycles appears not accurately to model when lines are tested.
...
Therefore I've reverted to a more normative 4:4 form.
2019-04-30 22:09:13 -04:00
Thomas Harte
92568c90c8
Adds support for HALT as an input, and puts some effort into how to calculate E.
2019-04-30 22:07:48 -04:00
Thomas Harte
f1879c5fbc
Corrects interrupt level test within STOP.
2019-04-30 19:32:35 -04:00
Thomas Harte
31bb770fdd
Implement STOPpages, waits for DTack, and bus and address error exceptions.
2019-04-30 19:24:22 -04:00
Thomas Harte
e430f2658f
Adds a test and by that means fixes divide-by-zero exception return addresses.
2019-04-29 23:09:50 -04:00
Thomas Harte
eb4233e2fd
Joins some commonalities, shaving about 150 lines of code.
2019-04-29 22:37:23 -04:00
Thomas Harte
6b4c656849
Reverses order of instruction instantiation, reducing total bus step heft by about 11%.
...
... since that means inserting more complicated instructions before simpler ones in general, making subset finds more likely.
2019-04-29 22:20:18 -04:00
Thomas Harte
1b8fada6aa
Restores accidentally-cropped functionality.
2019-04-29 22:10:00 -04:00
Thomas Harte
977f9ee831
Takes a run at divide-by-zero exceptions and starts looking towards ways to improve startup time.
2019-04-29 22:08:16 -04:00
Thomas Harte
16fb3b49a5
It leads to a TODO, but implemented decoding and initial setup of STOPpages.
2019-04-29 19:30:00 -04:00
Thomas Harte
3da1b3bf9b
Introduces storage for various bus inputs.
2019-04-29 19:22:05 -04:00
Thomas Harte
bc00856c05
Removed TODO; it appears this is just the standard stack frame.
2019-04-29 19:09:20 -04:00
Thomas Harte
52e3dece81
Improves exposition.
2019-04-29 19:07:14 -04:00
Thomas Harte
2c1d8fa18a
Adds a check for instruction privilege violation, albeit that I think I need different bus steps.
2019-04-29 19:06:10 -04:00
Thomas Harte
3e34ae67f6
Implements support for the trace flag.
2019-04-29 19:02:59 -04:00
Thomas Harte
ceebecec8d
Corrects zero and negative flags for EXT.w.
2019-04-29 17:54:33 -04:00
Thomas Harte
05d1eda422
Fixes crossed-over decoding of EORI and ORI.
2019-04-29 17:45:52 -04:00
Thomas Harte
31f318ad43
Fixes MOVE.bw #, (xxx).w.
2019-04-29 17:41:46 -04:00
Thomas Harte
270f46e147
Normalises CMPl.
2019-04-29 17:27:56 -04:00
Thomas Harte
8564945713
Corrects vector nomination for unrecognised opcodes.
2019-04-29 17:10:33 -04:00
Thomas Harte
7bd7f3fb73
Sign-extends (xxx).w addresses.
2019-04-29 16:55:43 -04:00
Thomas Harte
c466b6f9e7
Factors out the [unit testing] stuff of being a trace-checking 68000 bus handler.
2019-04-29 16:11:01 -04:00
Thomas Harte
d9071ee9f1
Starts sketching out the asynchronous bus.
2019-04-29 13:45:53 -04:00
