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979 Commits

Author SHA1 Message Date
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. 
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
c300bd17fa Regularises as many source/destination sets as fit the current setter. 2019-07-24 18:22:44 -04:00
Thomas Harte
0187fd8eae Hides all runtime Program member accesses behind macros. 
... and fixes unit tests.
 2019-07-24 12:01:30 -04:00
Thomas Harte
4aca6c5ef8 Adds a note of admission here. 2019-07-23 23:03:15 -04:00
Thomas Harte
fa226bb1b9 Seeks to reduce enquiry costs. 2019-07-17 15:09:26 -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
ed4ddcfda8 Reduces call/return overhead on Microcycle methods. 2019-07-09 19:55:30 -04:00
Thomas Harte
69b94719a1 Switches to faster bit count logic. 2019-07-09 18:41:20 -04:00
Thomas Harte
5078f6fb5c Marginally reduces MOVE heft. 2019-07-09 18:07:11 -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. 
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
c4cbe9476c Corrects EA selection logic, fixing MOVEP. 2019-07-02 13:54:21 -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
c5039a4719 Imports ANDI, ORI and EORI to SR tests. 
Hence corrects supervisor/user privileges for SR/CCR.
 2019-06-28 15:05:46 -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
d81053ea38 Invents some additional PEA tests, and further fixes PEA. 2019-06-27 17:59:03 -04:00
Thomas Harte
8d39c3bc98 Takes a shot at fixing PEA for A7-relative addresses. 
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
538aecb46e Imports CMP tests, and fixes CMP.l timing. 2019-06-26 22:02:04 -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
2c813a2692 Imports CMPM tests and fixes CMPM.bw source/destination order. 2019-06-25 21:46:01 -04:00
Thomas Harte
d2cb595b83 Proactively attempts to fix CMPM PostInc addressing. 2019-06-25 21:24:03 -04:00
Thomas Harte
ecb5a0b8cc Incorporates ADDX tests and fixes ADDX PreDec. 2019-06-25 19:18:07 -04:00
Thomas Harte
e12e8fc616 Incorporates ASR tests, and fixes ASR (xxx).w. 
... 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. 
Overflow is wrong on other ASLs though, I think.
 2019-06-25 18:09:01 -04:00
Thomas Harte
31edb15369 Reduces 68000 startup costs a little further. 2019-06-25 17:41:13 -04:00
Thomas Harte
e830d23533 Incorporates TRAPV tests. 2019-06-24 21:21:35 -04:00
Thomas Harte
9a666fb8cc Imports NEG tests and fixes NEG.l Dn timing. 2019-06-24 19:43:30 -04:00
Thomas Harte
0e208ed432 Fixes cycle counting in the test machine. 2019-06-24 17:55:09 -04:00
Thomas Harte
c8b769de8a Completes import of LSL tests and fixes various LSL issues. 
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
3ec9a1d869 Incorporates JMP tests, fixes JSR (xxx).l timing. 2019-06-24 15:36:33 -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
d50fbfb506 Imports EXG and PEA tests, and fixes EXG timing. 2019-06-23 22:21:25 -04:00
Thomas Harte
86fdc75feb Incorporates RTR test, adding a ProcessorState helper. 2019-06-23 18:37:32 -04:00
Thomas Harte
b63231523a Completes import of ROL tests. 2019-06-23 17:33:12 -04:00
Thomas Harte
70e296674d Starts import of ROL tests. 
Including time tests, this time.
 2019-06-22 22:42:57 -04:00
Thomas Harte
8c8493bc9d Ensures proper loading of the SP at reset. 2019-06-21 18:20:26 -04:00
Thomas Harte
ccfe1b13cb Imports DIVS, MULS and MOVE from SR tests. 
Not all passing.
 2019-06-21 16:03:11 -04:00
Thomas Harte
0c1c10bc66 Introduces a test that proves that DIVS' attempt to set proper timing isn't working. 2019-06-20 19:29:02 -04:00
Thomas Harte
fafd1801fe Introduces first DIVS test, and associated fixes. 2019-06-20 19:02:03 -04:00
Thomas Harte
79d8d27b4c Reintroduces use of locations_by_bus_step_ to decrease 68000 construction time. 2019-06-20 15:10:11 -04:00
Thomas Harte
440f52c943 Incorporates TRAP test. 2019-06-19 21:18:30 -04:00
Thomas Harte
91ced056d2 Adds tests for ADD. No failures. 2019-06-19 18:56:21 -04:00
Thomas Harte
8dace34e63 Imports third-party tests for ABCD, and thereby fixes ABCD. 2019-06-19 18:13:06 -04:00
Thomas Harte
8182b0363f Adds enum to help with status decoding. 2019-06-19 17:01:49 -04:00
Thomas Harte
c5b036fedf Ensures aborted decodes don't overwrite prior correct ones. 2019-06-19 17:00:44 -04:00
Thomas Harte
e26ddd0ed5 Corrects address fetches for CMPI.l #, (xxx).w. 2019-06-19 13:52:56 -04:00
Thomas Harte
ca83431e54 Fixed: Scc is a byte operation. 
It was, until now, post-incrementing and pre-decrementing registers other than A7 incorrectly.
 2019-06-19 13:15:12 -04:00
Thomas Harte
00c32e4b59 Further miscellaneous changes to debug logging. All temporary. 2019-06-18 10:34:31 -04:00
Thomas Harte
877b46d2c1 Advances IWM/drive emulation very close to the point of 'Welcome to Macintosh'. 2019-06-15 16:08:54 -04:00
Thomas Harte
bde975a3b9 Possibly mights the tiniest bit of headway with 'the IWM'. 
I'm now pretty sure that my 3.5" drive, which for now is implemented in the IWM (yuck) is just responding to queries incorrectly.
 2019-06-13 22:38:09 -04:00
Thomas Harte
f6f9024631 Corrects Macintosh aspect ratio (and framing). 2019-06-13 18:41:38 -04:00
Thomas Harte
59a94943aa Resolves final set of build warnings. 2019-06-13 10:55:29 -04:00
Thomas Harte
bf4889f238 Reduces warnings to 6. 2019-06-13 10:43:00 -04:00
Thomas Harte
7cc5afd798 Eliminates another couple of implicit type conversion warnings. 2019-06-13 10:30:26 -04:00
Thomas Harte
11ab021672 Further reduces implicit conversion warnings, to 17. 2019-06-13 10:27:49 -04:00
Thomas Harte
feafd4bdae Eliminates further type conversion warnings. 2019-06-13 10:20:17 -04:00
Thomas Harte
d6150645c0 By hook or by crook, mouse input now works. 2019-06-12 22:19:25 -04:00
Thomas Harte
ec5701459c Makes various temporary logging changes. 2019-06-11 19:54:07 -04:00
Thomas Harte
697e094a4e Sketches out the absolute basics of an SCC interface. 2019-06-08 18:47:11 -04:00
Thomas Harte
e9d0676e75 Fiddles further with the tachometer. 2019-06-06 21:36:19 -04:00
Thomas Harte
7591906777 Numerous IWM fixes: the machine now seems to be trying to measure the tachometer. 2019-06-06 18:32:11 -04:00
Thomas Harte
058fe3e986 Fixes some other low-hanging warning fruit. 2019-06-04 16:47:10 -04:00
Thomas Harte
51ee83a427 Resolves a further 11 conversion errors. 2019-06-04 16:34:45 -04:00
Thomas Harte
5b21da7874 Reduces number of warnings to 70. 2019-06-04 16:27:09 -04:00
Thomas Harte
bd7f00bd9c Resolves a further handful of implicit type conversion warnings. 2019-06-04 15:43:44 -04:00
Thomas Harte
4d4ddded6d Fixes register-relative JMP and JSR. 2019-06-03 15:29:50 -04:00
Thomas Harte
881feb1bd3 Adds preliminary parsing of the Disk Copy 4.2 format. 2019-06-02 13:39:25 -04:00
Thomas Harte
035f07877c Reduces conversions to vector. 2019-05-30 12:08:35 -04:00
Thomas Harte
b3d2b4cd37 Fixes the interrupt return address. 2019-05-29 20:27:46 -04:00
Thomas Harte
c86fe9ada9 Ensures replace_write_values works in release builds. 2019-05-29 19:00:53 -04:00
Thomas Harte
ecf93b7822 Eliminates some type conversion warnings. 2019-05-29 14:56:50 -04:00
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
34fe9981e4 Added necessary mea culpas. 2019-05-03 14:25:25 -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
3060175ff5 Eliminates constructions of std::tuple for performance reasons. 
Specifically: reduces 68000 construction time from 10+ seconds to more like 2.8.
 2019-04-29 22:43:15 -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
Thomas Harte
97e118abfa Corrects accidental exclusion of MOVE.bw (xxx).w, [(xxx).w/(xxx).l]. 2019-04-28 23:25:46 -04:00
Thomas Harte
412f091d76 Implements a missing form of BTST. 2019-04-28 23:20:50 -04:00
Thomas Harte
ca1f669e64 Implements MOVEP. 
371 is now the alleged number of missing opcodes. But I'd dare imagine it's more like three or four.
 2019-04-28 22:52:54 -04:00
Thomas Harte
0298b1b3b7 Implements LINK and UNLINK. 
Also starts excluding opcodes that I can't determine the mapping of from the list of those tested against.

Due to those two things together, the latter incomplete: 627 opcodes outstanding. But only STOP and MOVEP remain on my list of things to implement prior to exceptions.
 2019-04-28 17:12:31 -04:00
Thomas Harte
4b1324de77 Takes a run at TRAPV. 
... to leave 1466 as the unimplemented count.
 2019-04-28 15:52:58 -04:00
Thomas Harte
8e8dce9bec Attempts an implementation of CHK. 
1467 is now the official count of things to implement, though I'm starting to get suspicious.
 2019-04-28 15:47:21 -04:00
Thomas Harte
f4350522bf Implements NBCD. 
Now outstanding: 1891.
 2019-04-27 21:29:50 -04:00
Thomas Harte
e2abb66a11 Adds missing addressing modes for ADDA and SUBA. 
... reducing missing opcodes to 1941.
 2019-04-27 17:22:26 -04:00
Thomas Harte
ab5fcab9bf Attempts an implementation of ADDX and SUBX. 
Leaving 2005 non-[A/F]-line instructions.
 2019-04-27 16:57:47 -04:00
Thomas Harte
e75b386f7d Attempts DIVU and DIVS. 
Reportedly leaving 10965 operations now unimplemented.
 2019-04-26 22:22:35 -04:00
Thomas Harte
796203859f Implements PEA. 
This decreases the unimplemented count by 28 from 11841 to 11813.
 2019-04-26 13:49:59 -04:00
Thomas Harte
40b2fe7339 Merge branch 'master' into 68000 2019-04-26 00:02:35 -04:00
Thomas Harte
a3b6d2d16e Corrects test and resolves all instances of opcodes that are valid but shouldn't be. 
The converse case will require implementation of the remaining instructions.
 2019-04-25 22:54:58 -04:00
Thomas Harte
3983f8303f Introduces failing test of 68000 opcode coverage. 2019-04-25 22:06:05 -04:00
Thomas Harte
dab9bb6575 Implements EXT. 2019-04-25 18:22:19 -04:00
Thomas Harte
c132bda01c Implements MOVE from SR. 2019-04-25 14:39:32 -04:00
Thomas Harte
4e25bcfcdc Corrects decoding of AND/OR x, Dn. 2019-04-25 14:19:13 -04:00
Thomas Harte
ea463549c7 Corrects overflow flag for LSL and LSR. 2019-04-25 13:59:10 -04:00
Thomas Harte
723acb31b3 Corrects various flag issues with ADD, SUB and NEG. 2019-04-25 13:53:23 -04:00
Thomas Harte
5725db9234 Corrects calculated-address TAS. 2019-04-25 12:42:05 -04:00
Thomas Harte
8557e563bc Takes a run at TAS, clarifying bus cycles. 2019-04-25 12:19:40 -04:00
Thomas Harte
d2491633ce Ensures MOVEM to M .w correctly updates A7. 2019-04-24 23:21:15 -04:00
Thomas Harte
002796e5f5 Takes a run at BSET and BCHG. 2019-04-24 23:01:32 -04:00
Thomas Harte
fa0accf251 Attempts to correct flags for ASL, ASR, LSL, LSR. 2019-04-24 21:04:47 -04:00
Thomas Harte
dcb8176d90 Corrects potential failure properly to set stack pointer state. 2019-04-24 17:58:27 -04:00
Thomas Harte
be32b1a198 Fixes JSR (An) return address [again]. 2019-04-24 17:50:38 -04:00
Thomas Harte
582e4acc11 Implements ANDI/ORI/EOR to SR/CCR. 2019-04-24 17:38:59 -04:00
Thomas Harte
10f75acf71 Causes EXG to function. 2019-04-24 16:32:16 -04:00
Thomas Harte
b9933f512f Fixed: the word/long-word bit works the other way around. 2019-04-24 16:30:15 -04:00
Thomas Harte
75a7f7ab22 Inserts missing program fetch for CMPI.bw #, (d8/16...). 2019-04-24 14:45:24 -04:00
Thomas Harte
e214584c76 SWAP should clear overflow and carry. 2019-04-24 13:19:56 -04:00
Thomas Harte
0bb6b498ce Simplifies and fixes post-inc MOVE behaviour. 2019-04-24 13:14:25 -04:00
Thomas Harte
958d44a20d Causes SWAP actually to perform. 2019-04-24 13:06:12 -04:00
Thomas Harte
bb9424d944 Corrects byte increment/decrement actions for A7. 2019-04-24 13:01:08 -04:00
Thomas Harte
11bf706aa2 Attempts to fix LT and LTE conditions. 2019-04-24 10:07:17 -04:00
Thomas Harte
033b8e6b36 ADD/SUBQ #, An shouldn't set flags. 
Also, temporarily at least, adds a new means for observing CPU behaviour.
 2019-04-24 09:59:54 -04:00
Thomas Harte
7c3ea7b2ea Resolves additional byte accesses being signalled as word. 2019-04-23 21:23:20 -04:00
Thomas Harte
a08043ae88 Ensures that MOVE.b #, (xxx).l writes only a byte. 
Also rearranges some of the temporary logging functionality.
 2019-04-23 19:01:58 -04:00
Thomas Harte
7c132a3ed5 Ensures 16-bit values of Xn for (d8, An, Xn) are sign extended. 2019-04-22 22:13:02 -04:00
Thomas Harte
20e774be1e Corrects return address of JSR (An). 2019-04-22 21:11:49 -04:00
Thomas Harte
6d6046757d Fixes predecrementing MOVEM to leave the proper address in the relevant register. 2019-04-22 15:41:09 -04:00
Thomas Harte
55073b0a52 Corrects a bunch of MOVEs to (d8/16, PC/An, [Xn]). 2019-04-21 22:55:23 -04:00
Thomas Harte
44eb4e51ed Ensures DBcc properly signals program fetches. 2019-04-21 22:54:20 -04:00
Thomas Harte
3cb042a49d Corrects the carry and extend flags for various long-word operations. 2019-04-21 22:08:18 -04:00
Thomas Harte
b78ea7d24c Further simplifies CMPA. 2019-04-20 21:23:36 -04:00
Thomas Harte
c66728dce2 Corrects decoding of CMPA. 2019-04-20 21:21:33 -04:00
Thomas Harte
0be9a0cb88 Corrects Scc (and other conditionals) for complex addressing modes. 2019-04-20 18:35:19 -04:00
Thomas Harte
a90f12dab7 Corrects return address for TRAP. 2019-04-20 15:49:32 -04:00
Thomas Harte
ef33b004f9 Corrects word access order of MOVEM.l. 2019-04-20 15:13:12 -04:00
Thomas Harte
2cac4b0d74 Corrects EA usage for ADDA and SUBA. 2019-04-19 23:02:41 -04:00
Thomas Harte
a49f516265 Corrects direction of MOVE [to/from] USP. 2019-04-19 22:41:06 -04:00
Raphaël Zumer
71ac26944d Correct typos in Z80.hpp 2019-04-19 17:44:52 -04:00
Thomas Harte
2d97fc1f59 Beefs up documentation and developer support. 2019-04-19 13:29:35 -04:00
Thomas Harte
9ef7743205 Attempts to unify type decoding a little further. 2019-04-19 13:29:20 -04:00
Thomas Harte
ee7ae11e90 Implements EXG and SWAP. 2019-04-19 11:27:43 -04:00
Thomas Harte
f67d7f1db5 Adds the final (!) set of missing MOVEs. 2019-04-19 11:11:38 -04:00
Thomas Harte
99981751a2 Adds the official NOP. 
Which is a freebie.
 2019-04-18 23:46:01 -04:00
Thomas Harte
ffdf02c5df Adds MOVE XXX.lw, -(An) 2019-04-18 23:40:54 -04:00
Thomas Harte
27c7d00a05 Commutes final missing MOVEs to TODOs. 2019-04-18 23:35:32 -04:00
Thomas Harte
64c4137e5b Begins a cleanup procedure on MOVE. 2019-04-18 23:25:19 -04:00
Thomas Harte
8c26d0c6e6 Makes an attempt at RTE and RTR. 2019-04-18 20:50:58 -04:00
Thomas Harte
81dcfd9f85 Implements AND, OR and EOR. 
As well as introducing a little more nuance to the double-decoding test.
 2019-04-18 16:34:48 -04:00
Thomas Harte
9334557fbf Added important TODO. 2019-04-17 23:12:32 -04:00
Thomas Harte
b09de8efce Attempts to fill in the rest of MOVE x, -(An). 2019-04-17 23:05:16 -04:00
Thomas Harte
5a50eb56dd Marginally increases coverage of MOVE x, -(An). 2019-04-17 22:30:07 -04:00
Thomas Harte
e49b257e94 Takes a run at TRAP. 2019-04-17 22:21:56 -04:00
Thomas Harte
b8a0f4e831 Implements MOVE to/from USP. 2019-04-17 16:58:59 -04:00
Thomas Harte
29f8dcfb40 Fixes a bunch of (d16, An)-type MOVEs and implements MOVE (XXX).wl, (d16,An)/etc. 2019-04-17 16:13:35 -04:00
Thomas Harte
0c05983617 Shortens impact of MULU on the instruction stream to correct parsing. 
I need to look into this.
 2019-04-17 15:15:48 -04:00
Thomas Harte
0bd653708c Corrects MOVE.bw Dn, (An)[+]. 2019-04-17 14:31:20 -04:00
Thomas Harte
41d800cb63 Fixes ADD/SUB Dn,x to use the proper destination value. 2019-04-17 10:23:47 -04:00
Thomas Harte
cadc0bd509 Mental delusion lifted: JSR doesn't look enough like BSR. 2019-04-17 10:02:14 -04:00
Thomas Harte
b64da2710a Corrects a few MOVE #s. 2019-04-17 10:00:14 -04:00
Thomas Harte
82b08d0e3a Corrects addressing behaviour of nRd[+-]. 2019-04-17 08:53:34 -04:00
Thomas Harte
8f77d1831b Implements MULU and MULS. 2019-04-16 22:16:43 -04:00
Thomas Harte
be722143e1 Completes addressing modes for ADDI/etc/etc. 2019-04-16 21:34:16 -04:00
Thomas Harte
d8d974e2d7 Consolidates JSR and BSR preparation. 2019-04-16 21:29:37 -04:00
Thomas Harte
9b7ca6f271 Implements the basics of EORI, ORI, ANDI, SUBI and ADDI. 
Also corrects the BSR return address.
 2019-04-16 19:50:10 -04:00
Thomas Harte
8ce018dbab Adds the necessary runtime support for AND, EOR and OR. 2019-04-16 15:17:40 -04:00
Thomas Harte
180062c58c Finishes fleshing out [ADD/SUB]Q. 2019-04-16 14:28:31 -04:00
Thomas Harte
37656f14d8 Adds basic addressing modes for [ADD/SUB]Q. 2019-04-16 11:19:45 -04:00
Thomas Harte
dec5535e54 Implements (arguably: fixes) BSR. 2019-04-15 23:20:36 -04:00
Thomas Harte
1f0e3b157a Corrects a couple of JSR and JMP addressing modes. 2019-04-15 22:37:11 -04:00
Thomas Harte
d802e83f49 Fills in further MOVEs. 2019-04-15 22:25:22 -04:00
Thomas Harte
ebcae25762 Adjusts JSR behaviour and further extends MOVE. 2019-04-15 22:02:52 -04:00
Thomas Harte
5330267d16 Implements BCLR. 2019-04-15 18:11:02 -04:00
Thomas Harte
892476973b Attempts RO{X}[L/R]. 2019-04-15 17:31:58 -04:00
Thomas Harte
84f4a25bc9 Completes TST. 2019-04-15 16:28:20 -04:00
Thomas Harte
1460a88bb3 Takes a run at JSR and RTS. 2019-04-15 15:14:38 -04:00
Thomas Harte
d25ab35d58 Finally gets setw usage correct. 2019-04-15 12:41:56 -04:00
Thomas Harte
a223cd90a1 Adds predecrement TSTs, increases QL running time, reduces logging. 2019-04-15 12:36:08 -04:00
Thomas Harte
aef92ba29c Corrects immediate shift count. 2019-04-15 12:25:45 -04:00
Thomas Harte
328d297490 Implements the first few addressing modes for TST. 2019-04-15 10:03:52 -04:00
Thomas Harte
3d240f3f18 Corrects decoding of DBcc. 2019-04-15 09:49:23 -04:00
Thomas Harte
45f35236a7 Corrects decoding of ADDA and SUBA. 2019-04-15 09:44:06 -04:00
Thomas Harte
fba210f7ce Corrects MOVE.l Dn, (An)[+]. 2019-04-15 09:30:49 -04:00
Thomas Harte
8a09e5fc16 Implements Scc. 2019-04-14 22:39:13 -04:00
Thomas Harte
75d8824e6b Eliminates implicit type conversion. 2019-04-14 21:02:28 -04:00
Thomas Harte
325af677d3 Implements MOVEM to M with an implicit type conversion. 2019-04-14 20:53:27 -04:00
Thomas Harte
1003e70b5e Implements MOVEM to R. 2019-04-14 20:02:18 -04:00
Thomas Harte
d70229201d Advances right up to the lack of MOVEM actions being the final piece. 2019-04-14 14:45:29 -04:00
Thomas Harte
823f91605b Still slow pedalling slightly, adds further MOVEM storage. 2019-04-14 14:31:13 -04:00
Thomas Harte
53f75034fc Commits at least to decoding MOVEM. 2019-04-14 14:09:28 -04:00
Thomas Harte
78649a5b54 Fleshes out MOVE, (XXX) a little further. 2019-04-12 17:16:03 -04:00
Thomas Harte
f48db625a0 Corrects write-back and zero flag for ADD/SUB.l. 2019-04-12 16:41:00 -04:00
Thomas Harte
2ba66c4457 Corrects MOVEA, adds extra test safeguards. 2019-04-12 16:10:17 -04:00
Thomas Harte
2c78ea1a4e Completes conversion away from magic constants. 2019-04-12 15:48:29 -04:00
Thomas Harte
73f50ac44e Commits further to elimination of magic constants. 2019-04-12 13:45:28 -04:00
Thomas Harte
9ce48953c1 Improves debugging printout. 2019-04-12 13:45:03 -04:00
Thomas Harte
1098cd0c6b Begins rooting out magic constants. 2019-04-11 22:31:17 -04:00
Thomas Harte
652ebd143c
Corrects addressing mode support for LEA. 2019-04-11 11:58:34 -04:00
Thomas Harte
8e9d7c0f40 Corrects register-relative address calculation. 2019-04-10 23:09:03 -04:00
Thomas Harte
a64948a2ba Permits zero-bus-op non-terminals. 2019-04-10 22:42:43 -04:00
Thomas Harte
43f619a081 Implements ASL, ASR, LSL and LSR. 2019-04-10 22:31:04 -04:00
Thomas Harte
a07de97df4 Implements the fixed part of register shifts. 2019-04-09 22:12:37 -04:00
Thomas Harte
85d25068a8 Attempts a full implementation of memory shifts. 2019-04-09 22:04:25 -04:00
Thomas Harte
7a0319cfe5 Kicks the work of dealing with ASL/etc into the runtime. 2019-04-09 21:48:08 -04:00
Thomas Harte
f750671f33 Stepping gingerly onwards, adds a double-decoding test. 
As a result of that, collapses BRA into Bcc. Which provisionally looks correct.
 2019-04-09 16:54:41 -04:00
Thomas Harte
7886fe677a Cleans up commenting. 2019-04-08 22:51:18 -04:00
Thomas Harte
73c027f8e3 Implements CMPA and CMPM. [Provisionally] completing the CMPs. 2019-04-08 22:40:38 -04:00
Thomas Harte
eda88cc462 Implements MOVE to CCR. 2019-04-07 22:24:17 -04:00
Thomas Harte
652f4ebfed Implements CLR, NEG, NEGX and NOT. 2019-04-07 22:07:39 -04:00
Thomas Harte
06a2f59bd0 Implements DBcc. 2019-04-06 23:21:01 -04:00
Thomas Harte
03f365e696 Corrects source/destination order of CMP setup. 2019-04-06 20:00:15 -04:00
Thomas Harte
49a22674ba Corrects MOVE destinations. 2019-04-06 18:33:53 -04:00
Thomas Harte
ec494511ec Implements CMP. 2019-04-06 10:41:19 -04:00
Thomas Harte
af02ce9c6e Attempts to correct various instances of PC-relative addressing. 2019-04-05 23:49:13 -04:00
Thomas Harte
56e42859ab Ensures the supervisor flag is updated properly on MOVE to SR. 2019-04-05 23:21:50 -04:00
Thomas Harte
2d153359f8 Adds BTST. 2019-04-04 21:43:22 -04:00
Thomas Harte
068ce23716 Adds a few more MOVEs. 2019-04-04 19:49:19 -04:00
Thomas Harte
03be2e3652 Adds decoding of ADDA and SUBA. 2019-04-03 22:39:01 -04:00
Thomas Harte
4ef2c0bed8 Completes ADD and SUB. 2019-04-03 21:41:59 -04:00
Thomas Harte
bfd405613c Reuse of addresses is also no longer implicit. 2019-04-03 21:27:11 -04:00
Thomas Harte
73e1c8c780 Corrects now-unimplemented ADD/SUB. 2019-04-03 19:43:54 -04:00
Thomas Harte
689ba1d4a2 Effective address adjustments now have to be explicit. 2019-04-03 19:13:10 -04:00
Thomas Harte
39b9d00550 Moves some way towards mapping out ADD and SUB, fixing a bug with address register modification. 2019-04-02 21:50:58 -04:00
Thomas Harte
64f99d83a4 Takes a stab at offering ADD, ADDA, SUB and SUBA operations. 
Not yet decoded.
 2019-04-01 21:21:26 -04:00
Thomas Harte
8f1faefa1c Implements further MOVEs and fixes a potential error in program formation. 2019-03-31 22:34:28 -04:00
Thomas Harte
a9ceef5c37 Improves communication slightly. 2019-03-31 22:27:33 -04:00
Thomas Harte
c6f977ed4b Corrects CMPI and documentation; implements JMP. 2019-03-31 21:13:26 -04:00
Thomas Harte
cb240cd32a Switches to a more explicit tokeniser, to allow for greater flexibility momentarily. 2019-03-30 23:11:39 -04:00
Thomas Harte
bc6349f823 Adds RESET, fixes branches and attempts to fix CMPI. 2019-03-29 23:40:54 -04:00
Thomas Harte
a93a1ae40f Completes MOVE.blw <ea>, Dn/An/(An)/(An)+, implements MOVEq. 2019-03-29 23:13:41 -04:00
Thomas Harte
25254255fe Implements a few additional MOVEs. 2019-03-27 21:26:04 -04:00
Thomas Harte
42634b500c Implements LEA. 2019-03-26 22:07:28 -04:00
Thomas Harte
be4b38c76a Adds BRA and Bcc. 2019-03-25 22:54:49 -04:00
Thomas Harte
7163b1132c Takes a run at CMPI. 
Also factors out a couple of mode things, clarifies on where things from the
prefetch are assembled to, and switches to ordering implemented instructions
alphabetically.
 2019-03-24 23:05:57 -04:00
Thomas Harte
3ccec1c996 Implements MOVE to SR, fleshing out the final bits of storage for the status word. 2019-03-24 18:20:54 -04:00
Thomas Harte
47359dc8f1 Adds tests for MOVE.l (An), Dn, and thereby correct their implementation. 2019-03-23 21:41:47 -04:00
Thomas Harte
43532c8455 Starts to make incursions into MOVE[A].l. 2019-03-23 21:03:52 -04:00
Thomas Harte
d7c3d4ce52 Adds test for MOVEA.w (0x1000), A1 and fixes implementation thereof. 2019-03-22 23:27:48 -04:00
Thomas Harte
ed7060a105 Made an initial stab at completing MOVEA.w. 
I think I'm probably peeking into the prefetch queue incorrectly.
 2019-03-22 21:43:51 -04:00
Thomas Harte
db0da4b741 Improves get/set state. 2019-03-22 19:34:17 -04:00
Thomas Harte
c9c16968bb Implements MOVEA as distinct from MOVE. 
At least as far as MOVE is implemented, that is.
 2019-03-22 19:25:53 -04:00
Thomas Harte
fdc598f2e1 Starts MOVE tests; in pursuit of which talks the 68000 into obeying run lengths. 2019-03-21 22:30:41 -04:00
Thomas Harte
f679145bd1 Makes a further push into the MOVEs. 
With some quick notation shortening.
 2019-03-20 23:21:02 -04:00
Thomas Harte
eeb161ec51 Converts the prefetch queue into a 32-bit quantity. 2019-03-19 21:33:52 -04:00
Thomas Harte
21cb7307d0 Adds MOVE #, Dn and MOVEA An, An. 
As well as the scheduling for `(d16,PC), Dd` and `MOVE (d8,As,Xn), Dd` other than the .ls.
 2019-03-19 11:53:37 -04:00
Thomas Harte
412a1eb7ee Takes an initial run at (An)+, -(An), (d16,An) and (d8,An,Xn) addressing modes. 
With only MOVEs from those to a data register implemented so far.
 2019-03-18 22:51:32 -04:00
Thomas Harte
1d801acf72 Switched to a better ABCD fix. 2019-03-17 22:04:32 -04:00
Thomas Harte
0d7bbdad54 Begins a basic get/set state API, allowing some actual unit tests, implying an ABCD fix. 2019-03-17 21:57:00 -04:00
Thomas Harte
53b3d9cf9d Implements a few more MOVE variants, plus MOVEA. 2019-03-17 14:34:16 -04:00
Thomas Harte
c3ebbfb10e Implements all MOVE Dn, Dn. 2019-03-16 23:14:18 -04:00
Thomas Harte
58f035e31a Makes error more communicative. 2019-03-16 23:05:12 -04:00
Thomas Harte
a8f1d98d40 Small further adjustments; seems likely to be correct now. 2019-03-16 23:01:56 -04:00
Thomas Harte
cf6fa98433 Corrects detection of terminal micro-ops. 2019-03-16 22:50:44 -04:00
Thomas Harte
937b3ca81d Attempts properly to honour the bus-op and microcycle contract. 2019-03-16 22:36:09 -04:00
Thomas Harte
d0c5cf0d2d Starts attempting to kill the need to prepare all bus step sequences in advance. 2019-03-16 21:47:46 -04:00
Thomas Harte
4cbf2bef82 By way of a friend, clears a bunch of transient stuff out of 68000Storage.hpp. 
As, even if not in the programmer's eye, this does affect recompilation times.
 2019-03-16 19:41:07 -04:00
Thomas Harte
388d808536 Switches to providing UDS and LDS implicitly via address. 
Also makes sure that the difference between a non-data cycle that starts without the address strobe active and one that starts with it active can be discerned.
 2019-03-16 17:54:58 -04:00
Thomas Harte
720aba3f2d Adds an implementation of SBCD and slightly neatens syntax for building programs. 2019-03-14 21:22:02 -04:00
Thomas Harte
f9101de956 This might very well be the 68000's first real gasp: performing an ABCD. 2019-03-14 19:32:15 -04:00
Thomas Harte
bb04981280 I'm still dithering on address management, but this seeks fully to implement ABCD and SUBD bus programs. 2019-03-13 21:08:13 -04:00
Thomas Harte
57898ed6dd This is where my thinking now resides. Two levels of indirection, and consolidated collections. 2019-03-12 22:46:31 -04:00
Thomas Harte
33b53e7605 Settles upon disassembly as the route in, and begins work in that direction. 2019-03-11 22:47:58 -04:00
Thomas Harte
89c71f9119 Introduces EmuTOS, and starts constructing test cases around it. 2019-03-10 18:40:12 -04:00
Thomas Harte
98aa597510 A theoretical 68000 could now perform its /RESET. That's all though. 2019-03-10 17:42:13 -04:00
Thomas Harte
de56d48b2f Embraces a more communicative 68000 bus. 2019-03-10 17:27:34 -04:00
Thomas Harte
4aeb9a7c56 Genericises RegisterPair. 2019-03-09 21:16:11 -05:00
Thomas Harte
b9b52b7c8b Begins some very early sketching out of a 68000. 2019-03-09 00:00:23 -05:00
Thomas Harte
d97348dd38 Eliminates dangling uses of printf. 2019-03-02 18:07:05 -05:00
Thomas Harte
ee89be6730 Removes many stray spaces. 2018-11-23 22:32:32 -05:00
Thomas Harte
364859467f Corrects Rockwell and WDC references. 
Also shuffles the NES CPU type up into the top position, so this is a strict progression in terms of functionality.
 2018-09-27 22:36:45 -04:00
Thomas Harte
8787d85e64 Eliminates #undefs as being (i) unnecessary, now this is a source file; and (ii) incomplete in any case. 2018-08-17 22:24:42 -04:00
Thomas Harte
0e7f54f375 Implements STP and WAI, and ensures all unimplemented 65C02 instructions are NOP for all 65C02s. 2018-08-17 21:49:06 -04:00
Thomas Harte
b3bdfa9f46 Corrected: it's three-cycle 65C02 branches that ignore interrupts, not two. 2018-08-16 20:47:49 -04:00
Thomas Harte
592ec69d36 Causes the 65C02 not to accept interrupts immediately after untaken branches. 2018-08-15 22:42:04 -04:00
Thomas Harte
60e00ddd02 Correction: the test for not skipping an operand fetch requires a 65C02. 2018-08-15 22:07:17 -04:00
Thomas Harte
6806193dc2 Ensures that "Read/Modify/Write instructions absolute indexed in same page" take only six cycles on a 65C02. 2018-08-15 19:17:37 -04:00
Thomas Harte
c35dca783f Ensures that page-crossing indexing no longer causes an extra read of an invalid address on the 65C02. 
It rereads the last byte of the instruction stream instead.
 2018-08-15 18:47:53 -04:00
Thomas Harte
901e0d65b9 Documents all 6502 micro-operations. 
Also makes sure 1-cycle NOPs really, definitely are one cycle only on a 65C02 and eliminates OperationCopyOperandFromA as a redundant copy of OperationSTA.
 2018-08-14 22:17:53 -04:00
Thomas Harte
ddf45a0010 Ensures NMI and RST reset D on 65C02s. 2018-08-14 19:49:14 -04:00
Thomas Harte
1eca4463b3 Ensures NMI can no longer usurp BRK on 65C02s. 2018-08-14 19:33:48 -04:00
Thomas Harte
be01203cc1 Starts to expand the range of supported 6502s. 
This fully implements the NES 6502 because, well, it's virtually no extra work, and ensures that RDY takes effect on write cycles on 65C02s.
 2018-08-13 22:17:22 -04:00
Thomas Harte
4b91910fab Removes erroneous addition. 2018-08-10 23:27:09 -04:00
Thomas Harte
878c63dcd2 Ensures ADC and SBC decimal take an extra cycle on the 65C02. 2018-08-10 22:52:55 -04:00
Thomas Harte
261fb3d4f8 Implements proper test for ADC/SBC 65C02 NZ, though not yet the proper timing. 
This gets Klaus Dorman's test to pass.
 2018-08-10 22:42:35 -04:00
Thomas Harte
5d6e479338 Implements RMB and SMB, and fixes SBC (zero). 2018-08-10 22:13:51 -04:00
Thomas Harte
90094529a5 Implements TSB and TRB, and adds the extra BIT instructions. 2018-08-10 22:04:45 -04:00
Thomas Harte
aed4c0539e Implements STZ. 2018-08-10 21:17:02 -04:00
Thomas Harte
8b50ab2593 Corrects (zero) behaviour. 2018-08-10 21:12:55 -04:00
Thomas Harte
95164b79c9 Attempted implementation of (zp) addressing mode. 2018-08-09 21:51:14 -04:00
Thomas Harte
6f838fe190 Implements INA and DEA. 2018-08-08 22:30:19 -04:00
Thomas Harte
bb680b40d8 Implements the 65C02's JMPs. 2018-08-08 22:26:57 -04:00
Thomas Harte
e3f6da6994 Implements the 65C02 NOPs. 2018-08-08 20:00:14 -04:00
Thomas Harte
e46bde35f5 Implements BBS and BBR. 2018-08-07 21:52:17 -04:00
Thomas Harte
32338bea4d Implements BRA. 2018-08-06 22:37:30 -04:00
Thomas Harte
5c881bd19d Implements PLX, PLY, PHX and PHY. 2018-08-06 22:00:23 -04:00
Thomas Harte
1a44ef0469 Introduces Klaus Dorman's 65C02 tests. All failing. 2018-08-06 21:48:43 -04:00
Thomas Harte
ebce9a2e51 Fixes test target. 2018-08-06 21:15:13 -04:00