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Code Issues Projects Releases Wiki Activity
8,144 Commits 8 Branches 121 Tags 496 MiB
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958 Commits

Author SHA1 Message Date
Thomas Harte
5cbb91f352 Fixes COP vector, ensures WDM skips a byte. 2020-11-03 20:01:02 -05:00
Thomas Harte
91ea2eff4c Corrects MVN/MVP off-by-one and failure to store what was read. 2020-11-03 18:29:35 -05:00
Thomas Harte
bf85d71674 Brings ADC into conformance. Fixes JML. 2020-11-03 18:12:10 -05:00
Thomas Harte
3889646d6b Takes a swing at incorporating krom's 65816 test suite. At least as far as ADC. 2020-11-02 21:09:32 -05:00
Thomas Harte
0178aaee2b Attempts retroactively to enforce the rule that 8-bit index modes => no top byte. 
(Rather than a preserved but ignored top byte)
 2020-11-02 18:55:28 -05:00
Thomas Harte
e8943618dc Adds some extra commentary and distinguishes X/Y sizing from M. 2020-10-31 10:21:13 -04:00
Thomas Harte
1ae2f6f449 PHD and PLD should always be 16-bit; PLP 8-bit. 2020-10-31 09:22:35 -04:00
Thomas Harte
88e26b42f5 Fixed: PHP pushes only 8 bits regardless of mode. 2020-10-30 22:36:00 -04:00
Thomas Harte
7f3f6c339f Corrects stacked program bank during native-mode exceptions. 2020-10-30 20:11:39 -04:00
Thomas Harte
266022b193 Fixes PEA. 2020-10-28 22:00:28 -04:00
Thomas Harte
1df2ce513a Ensures that reset doesn't push to the stack. 2020-10-28 21:23:35 -04:00
Thomas Harte
1e4679ae14 Corrects JSL and RTL. 2020-10-28 17:25:40 -04:00
Thomas Harte
b3ab9fff9b Imports a custom-built copy of Klaus Dormann's 65C02 test, with only 65816-compatible parts. 
Thereby fixes another couple of 65816 issues — BRK(, etc) not clearing the decimal flag, and `TRB d` being mismapped.
 2020-10-19 19:27:16 -04:00
Thomas Harte
14718b93a4
Improve commentary. 2020-10-19 09:32:50 -04:00
Thomas Harte
76d9893866 Declares address-bus sizes formally. 
This allows me to fix the final two implicit conversion warnings, albeit that it would have been nice to find a templatey way just to get the type directly from the declaration of `perform_bus_operation`.
 2020-10-18 15:08:21 -04:00
Thomas Harte
c3f8982c62 Resolves all internal implicit type-conversion warnings. 
Chasing those down, it looks like flags were wrong for PLB and PLD. So it's official: warnings help.
 2020-10-18 14:55:17 -04:00
Thomas Harte
99eba2f8ba Ensures intended 65816 exception behaviour. 
i.e. the relevant micro-op sequence exists, and its operation isn't lost. Also sets the 65816 by default to jump straight into power-on, not to execute an instruction first. That shouldn't make a functional difference, but it makes debugging easier because it makes startup fully deterministic.
 2020-10-18 14:43:47 -04:00
Thomas Harte
e5f57ea743 Make isReadOperation more overt. 2020-10-17 22:27:04 -04:00
Thomas Harte
3b398f7a9a Attempts to complete all 65816 bus signalling. 2020-10-16 21:56:20 -04:00
Thomas Harte
096add7551 Exposes non-BusOperation bus outputs. 2020-10-16 21:05:42 -04:00
Thomas Harte
334e0666b7 Reports ::Ready upon a WAI. 2020-10-15 21:37:37 -04:00
Thomas Harte
98c81749c8 Adds the conventional flush. 2020-10-15 21:36:04 -04:00
Thomas Harte
5dcf720bb5 Extends list of BusOperations. 
Now to retest, widely.
 2020-10-15 21:35:01 -04:00
Thomas Harte
9c0c0255f6 Ensures data/program bank can't accidentally be set to 16-bit values. 2020-10-15 21:10:32 -04:00
Thomas Harte
68c15bd605 Updates Qt project; catches another couple of issues via its compiler. 2020-10-15 21:09:22 -04:00
Thomas Harte
9a2f32795f Revokes stack-local storage non-optimisation. 2020-10-15 21:03:10 -04:00
Thomas Harte
7aa6cf4c6b Tidies up layout very slightly. 2020-10-15 20:51:23 -04:00
Thomas Harte
dfda2adf0d Attempts implementations of both ready and abort. 
Which I think concludes the inputs?
 2020-10-15 20:46:18 -04:00
Thomas Harte
c0a1c34012 Wraps all registers into a struct, so that I can implement abort. 
Makes some preparations for ready too.
 2020-10-15 18:42:38 -04:00
Thomas Harte
3c6adc1ff4 Completes 65816 addressing mode tests and corresponding fixes. 2020-10-14 22:00:52 -04:00
Thomas Harte
e511d33a7c Adds test for [d], y; fixes implementation. 2020-10-14 21:42:41 -04:00
Thomas Harte
27afb8f0a7 Adds direct indirect long test, and thereby fixes addressing mode. 
Nine to go!
 2020-10-14 21:26:20 -04:00
Thomas Harte
327ab81436 Fills in direct, x and (direct) tests, fixing implementation of the latter. 
10 to go.
 2020-10-14 21:17:28 -04:00
Thomas Harte
b22aa5d699 Starts transcribing the addressing examples I have into tests. 
Correspondingly extends the exposed register set and test-machine addressing range.
 2020-10-13 21:38:30 -04:00
Thomas Harte
3e6a2adaaf Corrects absolute, x and absolute, y addressing modes. 2020-10-13 20:30:39 -04:00
Thomas Harte
8f5537aaaa Attempts to resolve my direct-indirect addressing stumble. 2020-10-13 20:21:53 -04:00
Thomas Harte
a15d4a156b Starts trying to ensure appropriate address wrapping. 2020-10-12 22:33:43 -04:00
Thomas Harte
7479dc74ed Removes printf. It's no longer telling me anything. 2020-10-12 21:52:58 -04:00
Thomas Harte
28da1a724a Introduces Jeek816 test case. 2020-10-12 21:43:44 -04:00
Thomas Harte
f529eadbec Corrects 16-bit read-modify-write. 
Subject to the TODO proviso on 'correct'; has my 6502 prejudice pushed me into unrealistic bus signalling?
 2020-10-12 18:36:09 -04:00
Thomas Harte
5dc3cd3a2f Starts using Jeek816 for a basic native-mode audit. Fixes absolute long addressing. 2020-10-11 22:02:46 -04:00
Thomas Harte
3039a445f0 Ups the 65816 test machine to a full 16mb RAM. 2020-10-11 21:18:01 -04:00
Thomas Harte
82797fd395 Attempts to do the proper thing for interrupts. 2020-10-11 21:10:44 -04:00
Thomas Harte
a0885ab7d0 Implements STP and WAI. 
Albeit still without fully-implemented reactions to exceptions in general.
 2020-10-11 17:56:55 -04:00
Thomas Harte
8eaf1303a3 Attempts proactively to ensure proper RTI behaviour on the 65816. 2020-10-11 15:25:13 -04:00
Thomas Harte
20cbe72985 Ties to 8- or 16-bit those instructions that aren't M/X-dependent. 
This is technically redundant for PEI, PEA and PER since they have dedicated bus programs anyway, but it's good to be explicit.
 2020-10-11 14:38:35 -04:00
Thomas Harte
071ad6b767 I don't think RTL is needed; JML looks like it covers it. 2020-10-10 22:16:35 -04:00
Thomas Harte
0619e49eac Takes a short at TSB and TRB. 
Three to go.
 2020-10-10 22:00:17 -04:00
Thomas Harte
b8848d8580 Implements TCD, TDC, TCS, TSC. 2020-10-10 21:43:05 -04:00
Thomas Harte
aface1f8be Implements XBA and XCE. 2020-10-10 21:34:22 -04:00
Thomas Harte
ae87728770 Ensures M and X are exposed to the public interface. 2020-10-10 21:33:56 -04:00
Thomas Harte
28c8ba70c1 Implements REP and SEP and exposes the MX flags generally. 2020-10-10 21:23:59 -04:00
Thomas Harte
6892ac13e8 Corrects BIT. All 65816-applicable Wolfgang Lorenz tests now pass. 2020-10-10 17:47:33 -04:00
Thomas Harte
0fe09cd1e4 Knocks SBC into producing likely results; disables Lorenz testing. 2020-10-10 17:13:16 -04:00
Thomas Harte
da4702851f Fixes ADC. 2020-10-10 16:29:48 -04:00
Thomas Harte
d17c90edf7 Corrects ROL d, x. 2020-10-10 11:25:14 -04:00
Thomas Harte
7966592fae Corrects ROL d. 2020-10-10 11:22:23 -04:00
Thomas Harte
6efe4e1753 Fixes AND, EOR, ORA. Takes an unsuccessful shot at ROL. 2020-10-10 10:53:17 -04:00
Thomas Harte
536c4d45c1 Adds additional 65816 tests, some failing; seeks to improve carry behaviour in ASL and ROL. 2020-10-10 10:11:57 -04:00
Thomas Harte
290598429a Applies indirect page zero emulation mode addressing constraint to ix addressing. 
Lorenz's LDA tests now pass in emulation mode.
 2020-10-09 23:22:48 -04:00
Thomas Harte
92e72959c3 Makes corrections to ix addressing mode and shift/roll flags. 2020-10-09 23:12:20 -04:00
Thomas Harte
c01bc784b9 Slightly reduces branching. 2020-10-09 22:21:55 -04:00
Thomas Harte
abcd86a294 Fixes accumulator instructions. 2020-10-09 22:18:22 -04:00
Thomas Harte
451f83ba51 Corrects emulation-mode read-modify-writes not to empty the data buffer. 2020-10-09 22:14:42 -04:00
Thomas Harte
b439f40fe2 Corrects INC and DEC. 2020-10-09 22:04:25 -04:00
Thomas Harte
968166b06d Resolves incorrectly flow after setting up an absolute address. 2020-10-09 21:48:35 -04:00
Thomas Harte
0ed98cbfac Attempts to fix direct indirect indexed; not yet successful I think. 2020-10-08 22:15:19 -04:00
Thomas Harte
7dde7cc743 Implements altered direct indexed addressing in emulation mode. 2020-10-08 22:02:14 -04:00
Thomas Harte
755627f12d Corrects direct addressing. 2020-10-08 20:00:01 -04:00
Thomas Harte
f8004d7096 Implements RTI, corrects TAY. 2020-10-08 18:06:11 -04:00
Thomas Harte
0418f51ef2 Takes a shot at emulation-mode 'exceptions'. 
It's just RTI and correct decimal SBC left of the official 6502s now, I think.
 2020-10-08 17:52:13 -04:00
Thomas Harte
054e0af071 Corrects RTS behaviour: the return address on the stack is off by one. 
Dormann's tests now proceed to a BRK.
 2020-10-08 16:55:45 -04:00
Thomas Harte
907c3374c3 Attempts to clean up my JMP/JSR mess. 
Also takes a step forwards in decimal SBC, but it's not right yet.
 2020-10-08 16:48:46 -04:00
Thomas Harte
f83ee97439 PHP pushes with the BRK flag set in emulation mode. 2020-10-07 21:37:50 -04:00
Thomas Harte
19aea85184 Corrects CMP, CPX, CPY carry flags. 2020-10-07 21:23:29 -04:00
Thomas Harte
1ba0a117e7 Corrects PLB, PLD, PLP. 2020-10-07 20:23:53 -04:00
Thomas Harte
b510b9d337 Adds PHD, PHK and 8-bit PHP and PLP. 2020-10-07 20:13:12 -04:00
Thomas Harte
b608e11965 Realises that not all non-incrementing PC fetches should be thrown away. 2020-10-07 20:06:27 -04:00
Thomas Harte
e68b3a2f32 Corrects JMP program. 2020-10-07 19:59:29 -04:00
Thomas Harte
f7b119ffe1 Moves temporary logging, fixes branch instructions. 2020-10-07 19:57:58 -04:00
Thomas Harte
a4cec95db1 Corrects load and transfer flag oversights. 2020-10-07 19:36:23 -04:00
Thomas Harte
84c4fa197b Corrects DEX mapping, notes new Dormann failure case. 2020-10-07 18:48:03 -04:00
Thomas Harte
eac722cf59 Implements enough of ADC and SBC for the Dormann test definitively to fail. 2020-10-07 18:36:17 -04:00
Thomas Harte
7439a326a6 Implements BIT (in regular and immediate forms). 2020-10-07 18:15:18 -04:00
Thomas Harte
5ca1c0747f Generalises CMP to implement CPX and CPY. 2020-10-07 18:09:56 -04:00
Thomas Harte
466ca38dfa Corrects TXY and TYX; kudos to PatrickvL for the spot! 2020-10-07 18:05:42 -04:00
Thomas Harte
93b0839036 Knocks out some transfer operations. 
I'm possibly only seven or eight away from being able to test with complete official-opcode-only 6502 code?
 2020-10-06 22:29:34 -04:00
Thomas Harte
e068cbc103 Implements CMP and fixes a zero-flag error on 16-bit operations. 2020-10-06 21:47:26 -04:00
Thomas Harte
5c809e5fbf Implements rolls and shifts. 2020-10-06 21:34:39 -04:00
Thomas Harte
3933bf49cf Implements BRL. 2020-10-06 21:28:54 -04:00
Thomas Harte
7065ba4857 Implements the single-byte branches. 2020-10-06 21:24:43 -04:00
Thomas Harte
ebff83018e Implements the bitwise operators. 2020-10-06 20:17:03 -04:00
Thomas Harte
9ce9167e3c Formalises work left to do. 2020-10-06 19:12:19 -04:00
Thomas Harte
993eff1d3d Starts slowly, with flag manipulation. 2020-10-06 16:25:30 -04:00
Thomas Harte
7be983ec00 Slightly improve exposition. 2020-10-05 22:25:20 -04:00
Thomas Harte
18e8d6ce06 Makes an effort to factor out the 6502's [lazy] flags. 
This is preparatory to deciding which instructions, if any, are worth factoring out.
 2020-10-05 22:23:33 -04:00
Thomas Harte
b7ba0d4327 Attempts to complete all addressing modes. 
So, if bugs didn't exist, it'd just be members of the Operation enum to go.
 2020-10-05 17:04:57 -04:00
Thomas Harte
825201f4f2 Adds direct indirect. 2020-10-04 22:11:41 -04:00
Thomas Harte
9a05c68ce7 Attempts direct and direct indexed indirect. 2020-10-04 22:06:25 -04:00
Thomas Harte
d8dccf2500 Attempts a full implementation of MVN and MVP. 2020-10-04 19:21:04 -04:00