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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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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