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NES指令集  

2007-04-14 12:57:09|  分类: NES资料 |  标签: |举报 |字号 订阅

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 |     ADC   Add Memory to Accumulator with Carry
  |     AND   "AND" Memory with Accumulator
  |     ASL   Shift Left One Bit (Memory or Accumulator)
  |
  |     BCC   Branch on Carry Clear
  |     BCS   Branch on Carry Set
  |     BEQ   Branch on Result Zero
  |     BIT   Test Bits in Memory with Accumulator
  |     BMI   Branch on Result Minus
  |     BNE   Branch on Result not Zero
  |     BPL   Branch on Result Plus
  |     BRK   Force Break
  |     BVC   Branch on Overflow Clear
  |     BVS   Branch on Overflow Set
  |
  |     CLC   Clear Carry Flag
  |     CLD   Clear Decimal Mode
  |     CLI   Clear interrupt Disable Bit
  |     CLV   Clear Overflow Flag
  |     CMP   Compare Memory and Accumulator
  |     CPX   Compare Memory and Index X
  |     CPY   Compare Memory and Index Y
  |
  |     DEC   Decrement Memory by One
  |     DEX   Decrement Index X by One
  |     DEY   Decrement Index Y by One
  |
  |     EOR   "Exclusive-Or" Memory with Accumulator
  |
  |     INC   Increment Memory by One
  |     INX   Increment Index X by One
  |     INY   Increment Index Y by One
  |
  |     JMP   Jump to New Location
  |
  +------------------------------------------------------------------------


  ------------------------------------------------------------------------+
                                                                          |
         MCS6502 MICROPROCESSOR INSTRUCTION SET - ALPHABETIC SEQUENCE     |
                                                                          |
  ------------------------------------------------------------------------+
                                                                          |
        JSR   Jump to New Location Saving Return Address                  |
                                                                          |
        LDA   Load Accumulator with Memory                                |
        LDX   Load Index X with Memory                                    |
        LDY   Load Index Y with Memory                                    |
        LSR   Shift Right One Bit (Memory or Accumulator)                 |
                                                                          |
        NOP   No Operation                                                |
                                                                          |
        ORA   "OR" Memory with Accumulator                                |
                                                                          |
        PHA   Push Accumulator on Stack                                   |
        PHP   Push Processor Status on Stack                              |
        PLA   Pull Accumulator from Stack                                 |
        PLP   Pull Processor Status from Stack                            |
                                                                          |
        ROL   Rotate One Bit Left (Memory or Accumulator)                 |
        ROR   Rotate One Bit Right (Memory or Accumulator)                |
        RTI   Return from Interrupt                                       |
        RTS   Return from Subroutine                                      |
                                                                          |
        SBC   Subtract Memory from Accumulator with Borrow                |
        SEC   Set Carry Flag                                              |
        SED   Set Decimal Mode                                            |
        SEI   Set Interrupt Disable Status                                |
        STA   Store Accumulator in Memory                                 |
        STX   Store Index X in Memory                                     |
        STY   Store Index Y in Memory                                     |
                                                                          |
        TAX   Transfer Accumulator to Index X                             |
        TAY   Transfer Accumulator to Index Y                             |
        TSX   Transfer Stack Pointer to Index X                           |
        TXA   Transfer Index X to Accumulator                             |
        TXS   Transfer Index X to Stack Pointer                           |
        TYA   Transfer Index Y to Accumulator                             |

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