Thomas Harte
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a4cec95db1
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Corrects load and transfer flag oversights.
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2020-10-07 19:36:23 -04:00 |
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Thomas Harte
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84c4fa197b
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Corrects DEX mapping, notes new Dormann failure case.
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2020-10-07 18:48:03 -04:00 |
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Thomas Harte
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eac722cf59
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Implements enough of ADC and SBC for the Dormann test definitively to fail.
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2020-10-07 18:36:17 -04:00 |
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Thomas Harte
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7439a326a6
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Implements BIT (in regular and immediate forms).
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2020-10-07 18:15:18 -04:00 |
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Thomas Harte
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5ca1c0747f
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Generalises CMP to implement CPX and CPY.
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2020-10-07 18:09:56 -04:00 |
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Thomas Harte
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466ca38dfa
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Corrects TXY and TYX; kudos to PatrickvL for the spot!
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2020-10-07 18:05:42 -04:00 |
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Thomas Harte
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93b0839036
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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?
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2020-10-06 22:29:34 -04:00 |
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Thomas Harte
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e068cbc103
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Implements CMP and fixes a zero-flag error on 16-bit operations.
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2020-10-06 21:47:26 -04:00 |
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Thomas Harte
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5c809e5fbf
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Implements rolls and shifts.
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2020-10-06 21:34:39 -04:00 |
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Thomas Harte
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3933bf49cf
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Implements BRL.
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2020-10-06 21:28:54 -04:00 |
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Thomas Harte
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7065ba4857
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Implements the single-byte branches.
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2020-10-06 21:24:43 -04:00 |
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Thomas Harte
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ebff83018e
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Implements the bitwise operators.
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2020-10-06 20:17:03 -04:00 |
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Thomas Harte
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9ce9167e3c
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Formalises work left to do.
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2020-10-06 19:12:19 -04:00 |
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Thomas Harte
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993eff1d3d
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Starts slowly, with flag manipulation.
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2020-10-06 16:25:30 -04:00 |
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Thomas Harte
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18e8d6ce06
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Makes an effort to factor out the 6502's [lazy] flags.
This is preparatory to deciding which instructions, if any, are worth factoring out.
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2020-10-05 22:23:33 -04:00 |
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Thomas Harte
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b7ba0d4327
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Attempts to complete all addressing modes.
So, if bugs didn't exist, it'd just be members of the Operation enum to go.
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2020-10-05 17:04:57 -04:00 |
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Thomas Harte
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825201f4f2
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Adds direct indirect.
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2020-10-04 22:11:41 -04:00 |
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Thomas Harte
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9a05c68ce7
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Attempts direct and direct indexed indirect.
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2020-10-04 22:06:25 -04:00 |
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Thomas Harte
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d8dccf2500
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Attempts a full implementation of MVN and MVP.
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2020-10-04 19:21:04 -04:00 |
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Thomas Harte
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b416aa640f
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Slightly tidies up, eliminating some store bugs.
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2020-10-04 19:12:04 -04:00 |
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Thomas Harte
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4ebf594b3b
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This should bring me up to absolute, y.
i.e. next is datasheet program 7.
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2020-10-04 19:02:47 -04:00 |
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Thomas Harte
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8a83024962
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Starts a dash towards just completing the addressing modes for now.
This brings me up to the end of absolute long (i.e. 4a on the datasheet).
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2020-10-04 18:52:46 -04:00 |
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Thomas Harte
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bdc1136b96
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Edges towards working short absolute addressing mode.
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2020-10-03 21:30:24 -04:00 |
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Thomas Harte
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b83d93abc2
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Accepts that whether instructions do 8- or 16-bit bus accesses depends on either M or X depending on the operation.
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2020-10-02 17:08:30 -04:00 |
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Thomas Harte
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36f843bc6e
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Ensure std::function is visible to 65816Storage.cpp.
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2020-09-29 19:23:38 -04:00 |
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Thomas Harte
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15c87e02e9
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Ditto for printf.
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2020-09-29 18:53:02 -04:00 |
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Thomas Harte
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00923eac7c
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Ensure assert is visible to 65816Implementation.hpp.
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2020-09-29 18:52:25 -04:00 |
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Thomas Harte
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78b3ec4b10
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The actual work begins: starts implementing 65816 micro-ops.
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2020-09-29 18:42:07 -04:00 |
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Thomas Harte
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ef1a514785
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Introduces 6502Selector, for picking either a 6502 or a 65816 based on a single template parameter.
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2020-09-28 21:35:46 -04:00 |
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Thomas Harte
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6635876e7e
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Performs a bare factoring out of the 6502 bus handler.
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2020-09-28 18:43:53 -04:00 |
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Thomas Harte
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5645f90abe
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Takes a minor first step towards actually performing 65816 instructions.
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2020-09-27 22:20:58 -04:00 |
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Thomas Harte
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5449e90b34
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Edges towards offering the 65816 as another type of 6502 for testing.
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2020-09-26 22:31:50 -04:00 |
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Thomas Harte
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1cd664ad85
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Adds a sanity check.
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2020-09-26 21:43:26 -04:00 |
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Thomas Harte
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e680022b1f
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Completes the opcode set.
A million bugs yet to find.
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2020-09-26 21:35:31 -04:00 |
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Thomas Harte
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67c2ce2174
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Takes a run at completing the stack section.
I'm not really sure about BRK though — does it gain a signature on the 65816?
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2020-09-26 21:20:01 -04:00 |
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Thomas Harte
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596e700b60
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Drags myself onto the final page of bus programs.
233 opcodes now complete; six bus programs to go.
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2020-09-26 20:57:24 -04:00 |
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Thomas Harte
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4a53b6e538
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Adds push and pull, reaching 229/256 opcodes.
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2020-09-26 20:38:29 -04:00 |
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Thomas Harte
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687f4bb3bb
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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.
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2020-09-26 20:24:50 -04:00 |
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Thomas Harte
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473799cb62
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There's not a lot to STP and WAI from a bus program point of view.
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2020-09-26 20:18:30 -04:00 |
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Thomas Harte
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3dc22a9fd5
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Adds implied and immediate modes.
... for 204/256 opcodes covered.
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2020-09-26 17:42:42 -04:00 |
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Thomas Harte
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f54b655606
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Adds d, x and d, y.
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2020-09-26 17:26:17 -04:00 |
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Thomas Harte
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d2e868ea2b
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Adds (d), y; [d], y; and [d].
Now covered: 146/256 opcodes, 4/7 pages, 25/47 bus programs.
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2020-09-26 16:55:58 -04:00 |
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Thomas Harte
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3fc649359a
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Transcribes the titles of all remaining bus programs.
Thereby frames the distance yet to travel.
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2020-09-25 22:29:19 -04:00 |
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Thomas Harte
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1512ac11da
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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?
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2020-09-25 22:22:30 -04:00 |
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Thomas Harte
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5039cc7bb2
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Adds direct page.
... to cover 106 opcodes.
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2020-09-25 22:01:36 -04:00 |
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Thomas Harte
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5360a7b4ce
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Adds block moves.
These are fairly specialised, dealing in two data addresses simultaneously.
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2020-09-25 21:49:03 -04:00 |
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Thomas Harte
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2957a31f40
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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.
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2020-09-25 21:16:36 -04:00 |
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Thomas Harte
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8c11df52bf
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Adds absolute long, x.
Factors out the commonality of a closing read/write while I'm here.
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2020-09-25 19:27:17 -04:00 |
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Thomas Harte
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2b7ffcd48f
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Takes a run at JSL al.
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2020-09-25 18:35:00 -04:00 |
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Thomas Harte
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7980a9033e
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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.
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2020-09-25 18:16:49 -04:00 |
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