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
3cb5684d95
Fixes RTR: the whole top half of the SR should be preserved.
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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
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
84167af54f
Corrects CHK N flag.
2019-12-16 20:01:33 -05:00
Thomas Harte
4c068e9bb8
Corrects flags on CMPA.w.
2019-12-15 20:39:47 -05:00
Thomas Harte
4dd235f677
Adds supervisor/user to logged flags in trace mode.
2019-12-08 22:39:10 -05:00
Thomas Harte
6afefa107e
Resolves unused variable warning.
2019-11-05 23:18:25 -05:00
Thomas Harte
a67e0014a4
Fixes video base address and mono/colour monitor value.
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Now I see a GEM desktop. In blue.
2019-11-02 19:36:15 -04:00
Thomas Harte
c070f2100c
Attempts to regularise data bus access.
2019-11-01 23:01:06 -04:00
Thomas Harte
ecc0cea5a1
Added a potential branch for the newer TOS memory map.
2019-10-26 16:52:06 -04:00
Thomas Harte
6a80832140
Moves timing of interrupt sampling into prefetch queue advancement.
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As per comment, that is definitely the only place it can occur; I don't know whether it always occurs there.
2019-08-04 21:06:34 -04:00
Thomas Harte
35b1a55c12
Corrects DIVS negative flag.
2019-08-04 20:36:33 -04:00
Thomas Harte
e3794c0c0e
Takes a second pass at DIVS timing, seeming to correct that side of things.
2019-08-04 20:33:43 -04:00
Thomas Harte
478f2533b5
Corrects 68000 address bus during interrupt acknowledge.
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All unused bits should be 1, not 0.
2019-08-03 15:38:36 -04:00
Thomas Harte
5769944918
Shrinks MicroOp struct size from 16 bytes to 4.
2019-07-25 10:14:36 -04:00
Thomas Harte
1327de1c82
Slims the Program struct down to 8 bytes total.
2019-07-24 22:02:50 -04:00
Thomas Harte
827c4e172a
Cuts a third from the Program struct.
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Observation: [source/destination]_address are always one of the address registers. So you can fit both within a single byte.
Net effect: around a 12% reduction in execution costs, given that this reduces the size of the instructions table from 3mb to 2mb.
2019-07-24 18:39:36 -04:00
Thomas Harte
0187fd8eae
Hides all runtime Program member accesses behind macros.
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... and fixes unit tests.
2019-07-24 12:01:30 -04:00
Thomas Harte
cac97a9663
Devolves drive responsibility.
2019-07-10 22:39:56 -04:00
Thomas Harte
2ccb564a7b
Throws some extra logging into place, to test the IWM changeover.
2019-07-10 21:39:45 -04:00
Thomas Harte
69b94719a1
Switches to faster bit count logic.
2019-07-09 18:41:20 -04:00
Thomas Harte
94457d81b6
Eliminates redundant and integer-size-troubling AND on ASL.
2019-07-08 18:33:50 -04:00
Thomas Harte
fb352a8d40
Ensures assert is completely excluded if NDEBUG.
2019-07-08 18:00:37 -04:00
Thomas Harte
b9c2c42bc0
Switches drives to using floats for time counting.
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Hopefully to eliminate a lot of unnecessary `Time` work; inaccuracies should still be within tolerable range.
2019-07-02 15:43:03 -04:00
Thomas Harte
0a67cc3dab
Goes nuclear on ROXL and ROXR.
2019-07-01 23:05:48 -04:00
Thomas Harte
726e07ed5b
Corrects ASL overflow flag.
2019-07-01 19:46:58 -04:00
Thomas Harte
11d8f765b2
Corrects divide-by-zero exception length, enables all other DIVS checks.
2019-07-01 15:46:04 -04:00
Thomas Harte
514e57b3e9
Corrects DIVU timing and flags, improves DIVS.
2019-07-01 14:24:32 -04:00
Thomas Harte
d8fb6fb951
Corrects MULU timing.
2019-06-30 22:40:10 -04:00
Thomas Harte
255f0d4b2a
Corrects MULS timing.
2019-06-30 22:33:54 -04:00
Thomas Harte
8d0cd356fd
Corrects TRAP, TRAPV and CHK timing.
2019-06-29 21:25:22 -04:00
Thomas Harte
17666bc059
Corrects CHK flags.
2019-06-28 19:48:53 -04:00
Thomas Harte
241d29ff7c
Imports SBCD and NBCD tests, and fixes corresponding operation.
2019-06-28 19:39:08 -04:00
Thomas Harte
6c588a1510
Makes some further random swings at tracking the startup procedure.
2019-06-28 13:03:47 -04:00
Thomas Harte
8d39c3bc98
Takes a shot at fixing PEA for A7-relative addresses.
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Unit tests required. Tomorrow.
2019-06-26 23:24:54 -04:00
Thomas Harte
c0591090f5
Imports DIVU tests.
2019-06-26 22:25:48 -04:00
Thomas Harte
dbdbea85c2
Imports CMPA tests, and fixes CMPA.w.
2019-06-26 21:42:48 -04:00
Thomas Harte
ba2224dd06
Imports NEGX tests and thereby fixes NEGX's zero flag.
2019-06-26 19:39:04 -04:00
Thomas Harte
79066f8628
Imports NOT tests, fixes NOT overflow and carry flags.
2019-06-25 22:18:11 -04:00
Thomas Harte
e12e8fc616
Incorporates ASR tests, and fixes ASR (xxx).w.
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... which was re-injecting the wrong bit to preserve sign.
2019-06-25 18:44:31 -04:00
Thomas Harte
1fbbf32cd2
Adds ASL tests, and corrects ASL (xxx).w.
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Overflow is wrong on other ASLs though, I think.
2019-06-25 18:09:01 -04:00
Thomas Harte
e830d23533
Incorporates TRAPV tests.
2019-06-24 21:21:35 -04:00
Thomas Harte
c8b769de8a
Completes import of LSL tests and fixes various LSL issues.
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Including LSL (xxx).w actually being LSR, and the carry flag generally being questionable.
2019-06-24 17:45:38 -04:00
Thomas Harte
c447655047
Resolves assumption that shifts greater than the bit count of the relevant int are well-defined in C.
2019-06-24 16:51:43 -04:00
Thomas Harte
faef917cbd
Improves resizeable microcycle test.
2019-06-24 10:55:22 -04:00
Thomas Harte
d27ba90c07
Attempts to introduce more rigour to variable-length instruction handling.
2019-06-24 10:43:28 -04:00
Thomas Harte
db4ca746e3
Introduces BSET tests, fixes BSET timing.
2019-06-23 22:53:37 -04:00
Thomas Harte
86fdc75feb
Incorporates RTR test, adding a ProcessorState helper.
2019-06-23 18:37:32 -04:00
Thomas Harte
70e296674d
Starts import of ROL tests.
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Including time tests, this time.
2019-06-22 22:42:57 -04:00
