82 lines
2.6 KiB
Plaintext
82 lines
2.6 KiB
Plaintext
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load and store
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LDA load accumulator with memory NZ
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LDX load X register with memory NZ
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LDY load Y register with memory NZ
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STA STore Accumulator in memory -
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STX STore X register in memory -
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STY STore Y register in memory -
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STZ store zero in memory -
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Stack Operations
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PHA push accumulator on stack -
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PHX push X register on stack -
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PHY push Y register on stack -
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PHP push processor status on stack -
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PLA pull accumulator from stack NZ
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PLX pull X register from stack NZ
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PLY pull Y register from stack NZ
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PLP pull processor status from stack All
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TSX transfer the stack pointer to the X register NZ
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TXS transfer the X register to the stack pointer register -
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Increment & Decrement Operations
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INX increment X register by one NZ
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INY increment Y register by one NZ
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DEX decrement X register by one NZ
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DEY decrement Y register by one NZ
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INC increment memory or accumulator by one NZ
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DEC decrement memory or accumulator by one NZ
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Shift Operations
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ASL arithmetic shift one bit left, memory or accumulator NZC
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LSR logical shift one bit right, memory or accumulator N=0 ZC
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ROL rotate one bit left memory or accumulator NZC
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ROR rotate one bit right memory or accumulator NZC
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Logical Operations
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AND and accumulator with memory NZ
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ORA or accumulator with memory NZ
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EOR exclusive-or accumulator with memory NZ
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BIT BIt Test N=M7 V=M6 Z
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CMP compare accumulator with memory NZC
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CPX compare X register with memory NZC
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CPY compare Y register with memory NZC
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TRB Test and Reset memory Bit x
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TSB Test and Set memory Bit x
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RMB reset memory bit x
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SMB set memory bit x
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Math Operations
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ADC add memory to accumulator with carry NZCV
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SBC subtract memory accumulator, with borrow (carry bit) NZCV
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Flow Control Instructions
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JMP jump to new location -
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JSR jump to Subroutine -
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RTS return from Subroutine -
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RTI return from Interrupt
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BRA branch Always -
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BEQ branch if equal (Z == 0) -
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BNE branch if not equal (Z == 1) -
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BCC branch if carry clear (C == 0) -
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BCS branch if carry set (C == 1) -
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BVC branch if overflow clear (V == 0) -
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BVS branch if overflow set (V == 1) -
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BMI branch if minus (N == 1) -
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BPL branch if plus (N == 0) -
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BBR branch if bit reset -
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BBS branch if bit set -
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Processor Status Instructions
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CLC clear carry flag C=0
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CLD clear decimal mode D=0
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CLI clear interrupt disable bit I=0
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CLV clear overflow flag V=0
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SEC set carry flag C=1
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SED set decimal mode D=1
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SEI set interrupt disable bit I=1
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Transfer Instructions
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TAX transfer accumulator to X register NZ
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TAY transfer accumulator to Y register NZ
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TXA transfer X register to accumulator NZ
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TYA transfer Y register to accumulator NZ
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Misc Instructions
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NOP no operation -
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BRK break instruction B=1
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Interrupt
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wai wait for interrupt
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stp stop mode
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