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1088 Commits

Author SHA1 Message Date
Thomas Harte
687f4bb3bb Adds relative and relative long bus patterns. 
Many of the rest cover only one or two opcodes so this puts me at 216/256 opcodes covered; 35/47 bus programs; just more than 5/7 pages.
 2020-09-26 20:24:50 -04:00
Thomas Harte
473799cb62 There's not a lot to STP and WAI from a bus program point of view. 2020-09-26 20:18:30 -04:00
Thomas Harte
3dc22a9fd5 Adds implied and immediate modes. 
... for 204/256 opcodes covered.
 2020-09-26 17:42:42 -04:00
Thomas Harte
f54b655606 Adds d, x and d, y. 2020-09-26 17:26:17 -04:00
Thomas Harte
d2e868ea2b Adds (d), y; [d], y; and [d]. 
Now covered: 146/256 opcodes, 4/7 pages, 25/47 bus programs.
 2020-09-26 16:55:58 -04:00
Thomas Harte
3fc649359a Transcribes the titles of all remaining bus programs. 
Thereby frames the distance yet to travel.
 2020-09-25 22:29:19 -04:00
Thomas Harte
1512ac11da Adds (d, x) and (d) modes. Albeit by deferring the hard work. 
That's: 122/256 opcodes; 22/47 bus programs, ~3.5/7 pages transcribed. Maybe I'll be able to get to the runtime stuff sooner rather than later?
 2020-09-25 22:22:30 -04:00
Thomas Harte
5039cc7bb2 Adds direct page. 
... to cover 106 opcodes.
 2020-09-25 22:01:36 -04:00
Thomas Harte
5360a7b4ce Adds block moves. 
These are fairly specialised, dealing in two data addresses simultaneously.
 2020-09-25 21:49:03 -04:00
Thomas Harte
2957a31f40 Adds absolute, x; absolute,y; and accumulator addressing modes. 
Now covered: 80/256 opcodes, from 2/6 pages of the data sheet; or 16/47 bus programs.
 2020-09-25 21:16:36 -04:00
Thomas Harte
8c11df52bf Adds absolute long, x. 
Factors out the commonality of a closing read/write while I'm here.
 2020-09-25 19:27:17 -04:00
Thomas Harte
2b7ffcd48f Takes a run at JSL al. 2020-09-25 18:35:00 -04:00
Thomas Harte
7980a9033e Adds two-thirds of absolute long. 
Working total: 31 opcodes covered; 10/47ths of bus patterns.

Next is JSL, which I think will require additional operations.
 2020-09-25 18:16:49 -04:00
Thomas Harte
125ddfa513 Pays a little attention to runtime storage; completes the first page of bus patterns. 2020-09-25 18:00:02 -04:00
Thomas Harte
636e929607 Adds a check for 8/16-bit redundancy. 2020-09-25 17:42:42 -04:00
Thomas Harte
22c792dc46 Adds enough logic to start serialising instructions to somewhere. 
Possibly extraneous for now, but it means I can start stepping and testing.
 2020-09-25 17:18:25 -04:00
Thomas Harte
95af1815c8 Completes absolute indexed indirect micro-ops. 
For the record: this is just six out of forty-seven codes complete. Or about two-thirds of six pages. Plenty to do even before I start trying to interpret these things.
 2020-09-24 22:37:31 -04:00
Thomas Harte
d707c5ac95 Switches to generators with stable pointers; adds 2a. 2020-09-24 22:27:20 -04:00
Thomas Harte
5c9192e5e6 Switches to generators for spitting out micro-ops. 
Hopefully with a lot of parts to factor out naturally.
 2020-09-24 17:36:11 -04:00
Thomas Harte
72b5584042 Immediately runs afoul of a read/write difference in the specs between 8/16-bit mode that suggests maybe this isn't a good structure. 
Perhaps generators of some sort?
 2020-09-23 22:28:15 -04:00
Thomas Harte
f9045b5352 Rounds out declaration of the absolutes. 2020-09-23 22:23:23 -04:00
Thomas Harte
f87fe92bc8 Begins a meandering road towards the 65816. 2020-09-23 22:14:42 -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
2477752fa4 Adds further [[fallthrough]] attributes. 2020-06-19 23:36:51 -04:00
Thomas Harte
91229a1dbd Adds overt fallthrough attributes. 2020-06-19 23:22:29 -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
512a52e88d Increases const correctness, marks some additional constructors as constexpr, switches std::atomic construction style. 2020-05-20 23:34:26 -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
c5b746543b Factors the half mask into steps count. 2020-05-14 00:09:01 -04:00
Thomas Harte
11d936331d Attempts to preserve scheduled_program_counter_. 2020-05-13 23:58:04 -04:00
Thomas Harte
3709aa7555 Edges almost up to an initially complete implementation. 2020-05-13 22:04:04 -04:00
Thomas Harte
7c9d9ee048 Adds basic Z80 state. 2020-05-13 20:15:22 -04:00
Thomas Harte
66c2eb0414 Further tightens const and constexpr usage. 2020-05-12 22:22:21 -04:00
Thomas Harte
25996ce180 Further doubles down on construction syntax for type conversions. 2020-05-09 23:00:39 -04:00
Thomas Harte
cc357a6afa Removes boilerplate from header. 2020-04-02 19:15:57 -04:00
Thomas Harte
dfc1c7d358 Separates 6502 State object to make it optional. 
Also makes a few minor const improvements while I'm poking around.
 2020-04-02 19:11:27 -04:00
Thomas Harte
7ed8e33622 Eliminates unused 6502 counter. 2020-04-02 18:49:28 -04:00
Thomas Harte
a491650c8b Adds safety asserts. 2020-03-30 21:39:31 -04:00
Thomas Harte
95c68c76e1 Corrects use of StructImpl. 2020-03-30 00:27:40 -04:00
Thomas Harte
edc553fa1d Removes duplicative 'register'. 2020-03-29 22:58:00 -04:00
Thomas Harte
4f2ebad8e0 Takes a shot a set_state. 2020-03-29 22:50:30 -04:00
Thomas Harte
cfb75b58ca Pulls all 6502 MicroOp sequences into the main operations_ table. 
This will make state restoration somewhat more tractable.
 2020-03-29 18:36:41 -04:00
Thomas Harte
4fbe983527 Provisionally adds State and get_state to the 6502. 
`set_state` may be a little more complicated, requiring a way to advance in single-cycle steps **without applying bus accesses**.
 2020-03-28 00:33:27 -04:00
Thomas Harte
a51fe70498 Standardises cast syntax. 2020-03-06 21:55:00 -05:00
Thomas Harte
b971e2a42c Adds get_is_resetting to the Z80, eliminating the CPC's custom version. 2020-02-29 19:58:25 -05:00
Thomas Harte
01faffd5bf Corrects memptr behaviour of OTIR/OTDR and INIR/INDR. 
This seemingly perfects memptr.
 2020-02-27 20:55:43 -05:00
Thomas Harte
26de5be07c Corrects memptr behaviour of LDIR/LDDR and CPIR/CPDR. 2020-02-27 20:44:53 -05:00
Thomas Harte
87474d5916 Corrects memptr behaviour of OUT (C), 0. 2020-02-27 20:38:27 -05:00
Thomas Harte
06163165d9 Corrects memptr effect of LD rr, (nn). 2020-02-26 22:22:54 -05:00
Thomas Harte
ec82c075be Fixes memptr for IN C, (C). 2020-02-26 22:19:37 -05:00
Thomas Harte
3b0df172a7 Corrects memptr behaviour of JP nn. 2020-02-26 22:02:15 -05:00
Thomas Harte
7058dbc3cc Corrects memptr for LD HL, (nn). 2020-02-26 21:54:49 -05:00
Thomas Harte
b64de89d2d Corrects JR memptrs. 2020-02-26 21:47:34 -05:00
Thomas Harte
8878396339 Corrects DJNZ memptr behaviour. 2020-02-26 21:42:31 -05:00
Thomas Harte
3097c4ccae Improves MEMPTR testing and some results. 2020-02-24 23:32:18 -05:00
Thomas Harte
7959d243f6 Adds single-stepping. Of a kind. 2020-02-24 23:31:42 -05:00
Thomas Harte
79dd402bc8 Consolidates different test port input selection. 2020-02-23 16:12:28 -05:00
Thomas Harte
3f3229851b Implements MEMPTR for IN. 2020-02-23 00:32:33 -05:00
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
Thomas Harte
dc1abd874e Corrects indentation typo. 2019-12-14 23:52:53 -05:00
Thomas Harte
4dd235f677 Adds supervisor/user to logged flags in trace mode. 2019-12-08 22:39:10 -05:00
Thomas Harte
407cc78c78 Extends to offer simpler 8-bit access handling. 2019-12-08 20:19:44 -05:00
Thomas Harte
b12136691a Corrects comment. 2019-11-18 23:46:33 -05:00
Thomas Harte
db03b03276 Corrects [AND/OR/EOR].bw Dn, -(An) to decrement destination. 
It was previously doing a predecrement on the internal source address, which is unused. This fixes at least Dan Dare III and Silkworm.
 2019-11-09 11:25:23 -05:00
Thomas Harte
6afefa107e Resolves unused variable warning. 2019-11-05 23:18:25 -05:00
Thomas Harte
07582cee4a BusGrant is a further signal I will need. 2019-11-03 21:10:42 -05:00
Thomas Harte
a67e0014a4 Fixes video base address and mono/colour monitor value. 
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
1c154131f9 Expands size of storage in Cycles/HalfCycles; adjusts widely to compensate. 2019-10-29 22:36:29 -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
8a14f5d814 Updates to Xcode11 recommended project settings. 
The updated compiler also flagged a potential issue with CPU::Z80::Register not being a namespace re: 'Refresh' versus CPU::Z80::PartialMachineCycle. I don't entirely see it, but this fixes the problem.

I also finally figured out what the compiler was trying to tell me about ROMRequester.xib.
 2019-09-22 12:13:56 -04:00
Thomas Harte
6a80832140 Moves timing of interrupt sampling into prefetch queue advancement. 
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. 
All unused bits should be 1, not 0.
 2019-08-03 15:38:36 -04:00
Thomas Harte
b7b62aa3f6 Resolves some type conversion warnings. 2019-07-26 23:20:40 -04:00
Thomas Harte
5769944918 Shrinks MicroOp struct size from 16 bytes to 4. 2019-07-25 10:14:36 -04:00
Thomas Harte
9ef1211d53 Adds missing header file. 2019-07-24 22:13:32 -04:00
Thomas Harte
f2ae04597f Updates test case. 2019-07-24 22:07:17 -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. 
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