Thomas Harte
4ddbf095f3
Fully banish flush from the processors.
2022-07-12 10:49:53 -04:00
Thomas Harte
670201fcc2
Reset time debt upon 'reset'.
2022-06-08 16:03:16 -04:00
Thomas Harte
6efb9b24e0
Ensure that a phoney reset gets the proper vector.
2022-06-08 14:44:15 -04:00
Thomas Harte
9009645cea
Add 'reset' functions.
2022-06-07 16:55:39 -04:00
Thomas Harte
0af8660181
Remove add_pc and decline_branch in favour of operation-specific signals.
2022-05-09 16:19:25 -04:00
Thomas Harte
c61809f0c4
Add CMPAl.
2022-05-03 09:20:02 -04:00
Thomas Harte
17a2ce0464
Fix missung #undefs.
2022-05-02 21:29:46 -04:00
Thomas Harte
ef28d5512b
Annotate further.
2022-05-02 12:58:04 -04:00
Thomas Harte
fa49737538
Correct processor name.
2022-05-02 08:40:47 -04:00
Thomas Harte
8a18685902
Relocated RegisterSizes to Numeric.
2022-04-28 15:10:08 -04:00
Thomas Harte
ee625cb8a8
Minor style improvements; especially: don't assume value of NoBusProgram.
2021-12-25 14:05:38 -05:00
Thomas Harte
f20940a37b
Give Program full ownership of the sentinel value.
...
In case I want to reduce the size of this field later.
2021-12-23 16:32:21 -05:00
Thomas Harte
32e0a66610
Trust the compiler with this bit field.
2021-12-23 16:28:55 -05:00
Thomas Harte
d9598b35c2
Add some additional metrics.
2021-12-23 16:27:54 -05:00
Thomas Harte
863971f944
68000: fix E alignment, expand Microcycle::apply.
2021-09-08 21:03:37 -04:00
Thomas Harte
402f2ddbd9
Increases likelihood of 68000 Program offset-size assumptions being met.
2020-07-02 22:24:04 -04:00
Thomas Harte
6e4b8d58a5
Completes [[fallthrough]]s.
2020-06-19 23:50:37 -04:00
Thomas Harte
945a9da94f
Adds further [[fallthrough]]s.
2020-06-19 23:44:20 -04:00
Thomas Harte
73131735fa
Further qmake warning corrections.
2020-05-30 19:31:17 -04:00
Thomas Harte
267006782f
Starts to add Qt target; resolves many build warnings.
2020-05-30 00:37:06 -04:00
Thomas Harte
28881cb391
Implements apply.
2020-05-19 18:27:10 -04:00
Thomas Harte
a16b710d22
Removes <cassert> from Struct.h (which means it's needed in the 68000's State).
2020-05-19 00:06:29 -04:00
Thomas Harte
a3d4c7599b
Attempts fully to capture 68000 state.
...
Albeit that it can't be put back yet.
2020-05-18 23:55:54 -04:00
Thomas Harte
6f16928215
Adds all remaining simple scalar fields.
2020-05-16 22:47:04 -04:00
Thomas Harte
57edfe8751
Formalises TODO list and marches onward into execution state.
2020-05-16 18:31:43 -04:00
Thomas Harte
dcc0ee3679
Adds input line capture.
2020-05-16 17:44:15 -04:00
Thomas Harte
f7a16762b4
Starts populating the 68000 state registers.
2020-05-16 00:06:04 -04:00
Thomas Harte
8b76d4007e
Starts adding State for the 68000.
2020-05-14 22:46:40 -04:00
Thomas Harte
66c2eb0414
Further tightens const and constexpr usage.
2020-05-12 22:22:21 -04:00
Thomas Harte
dca79ea10e
Requires trace flag currently set.
2020-01-18 22:52:53 -05:00
Thomas Harte
b7fd4de32f
Ensures a one-instruction latency on the trace flag.
2020-01-18 22:06:00 -05:00
Thomas Harte
9f2f547932
Adds and satisfies test on the function code word.
...
Thanks to ijor's "68000 Address and Bus Error Stack Frame" re: contents.
2020-01-04 23:58:07 -05:00
Thomas Harte
f0d5bbecf2
Introduces a test of stack contents after an address error.
...
Fixes: stacked PC, address of fault.
2020-01-04 23:22:07 -05:00
Thomas Harte
a28c52c250
Fixes A7-relative JSRs.
...
I completely withdraw my earlier statement re: the test cases.
2020-01-04 22:22:33 -05:00
Thomas Harte
7de1181213
Make a new guess at post-overflow DIV flags, based on tests.
...
Specifically: for DIVU, stick with the current guess of a fixed set. For DIVS, leave N and Z alone.
2020-01-03 23:44:49 -05:00
Thomas Harte
c7a5b054db
There's no TODO here; overflow is always 0 for a 16x16 multiply.
...
... and the original 68000 doesn't support 32x32 multiplies.
2020-01-03 22:44:19 -05:00
Thomas Harte
2f8078db22
Switches to should_log as a global when I'm hacking about.
2020-01-02 20:15:48 -05:00
Thomas Harte
5be30b1f7b
Introduces further comparative tests, prompting a new CHK fix.
...
Specifically: how to set N when both is_under and is_over are true, and to eliminate a failure fully to prefetch in the longer addressing modes.
2020-01-01 19:11:36 -05:00
Thomas Harte
b184426f2b
Ensure that an interrupt from a STOP doesn't return to the STOP.
2020-01-01 14:51:47 -05:00
Thomas Harte
1de4f179c0
Adds more thorough comment on the bus program used.
2019-12-25 19:49:49 -05:00
Thomas Harte
3cb5684d95
Fixes RTR: the whole top half of the SR should be preserved.
...
Specifically, the 68000 Reference Manual says: "The supervisor portion of the status register is unaffected." Clearly when I first read that I misread it as the supervisor _flag_ (rather than _portion_) should be preserved.
2019-12-25 19:49:20 -05:00
Thomas Harte
274867579b
Deploys constexpr as a stricter const.
2019-12-22 00:22:17 -05:00
Thomas Harte
cf16f41939
Makes value8_high/low and value16 branchless.
2019-12-21 20:58:37 -05:00
Thomas Harte
08f2877382
I think the 68000 actually loads a byte value onto both the upper and lower data lines.
2019-12-21 20:37:03 -05:00
Thomas Harte
a3e64cae41
Corrects SBCD carry.
2019-12-17 22:16:02 -05:00
Thomas Harte
8a2ac87209
Reverted SBCD/NBCD V behaviour.
2019-12-16 23:08:59 -05:00
Thomas Harte
096b447b4b
Corrects MOVE -(An), SR/CCR, which was not previously decrementing.
...
Also adds a safety check against other instances of the same error. There seem to be none.
2019-12-16 22:38:54 -05:00
Thomas Harte
84167af54f
Corrects CHK N flag.
2019-12-16 20:01:33 -05:00
Thomas Harte
8be26502c4
Fixes NBCD -(An)+, adds some additional comments.
2019-12-16 20:01:19 -05:00
Thomas Harte
4c068e9bb8
Corrects flags on CMPA.w.
2019-12-15 20:39:47 -05:00
