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from: ftp://ftp.comlab.ox.ac.uk/pub/Cards/
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| Rockwell |
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| 666 5555555 CCCC 000 22222 |
| 6 5 C C 0 0 2 2 |
| 6 5 C 0 0 0 2 |
| 666666 555555 C 0 0 0 222 |
| 6 6 5 C 0 0 0 2 |
| 6 6 5 C C 0 0 2 |
| 66666 555555 CCCC 000 2222222 |
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| 65C02 CMOS MICROPROCESSOR Instruction Set Summary |
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| _________ _________ |
| _| \__/ |_ ___ |
| Vss |_|1 40|_| RES <-- |
| _| |_ |
| --> RDY |_|2 39|_| CLK2 --> |
| _| |_ |
| <-- CLK1 |_|3 38|_| NC |
| ___ _| |_ |
| --> IRQ |_|4 37|_| CLK0 <-- |
| _| |_ |
| NC |_|5 36|_| NC |
| ___ _| |_ |
| --> NMI |_|6 35|_| NC |
| _| |_ _ |
| --> SYNC |_|7 34|_| R/W --> |
| _| |_ |
| Vcc |_|8 33|_| DB7 <--> |
| _| |_ |
| <-- A0 |_|9 32|_| DB6 <--> |
| _| |_ |
| <-- A1 |_|10 65C02 31|_| DB5 <--> |
| _| |_ |
| <-- A2 |_|11 30|_| DB4 <--> |
| _| |_ |
| <-- A3 |_|12 29|_| DB3 <--> |
| _| |_ |
| <-- A4 |_|13 28|_| DB2 <--> |
| _| |_ |
| <-- A5 |_|14 27|_| DB1 <--> |
| _| |_ |
| <-- A6 |_|15 26|_| DB0 <--> |
| _| |_ |
| <-- A7 |_|16 25|_| A15 --> |
| _| |_ |
| <-- A8 |_|17 24|_| A14 --> |
| _| |_ |
| <-- A9 |_|18 23|_| A13 --> |
| _| |_ |
| <-- A10 |_|19 22|_| A12 --> |
| _| |_ |
| <-- A11 |_|20 21|_| Vss |
| |______________________| |
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|Written by Jonathan Bowen |
| Programming Research Group |
| Oxford University Computing Laboratory |
| 8-11 Keble Road |
| Oxford OX1 3QD |
| England |
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| Tel +44-865-273840 |
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|Created November 1984 |
|Updated April 1985 |
|Issue 1.1 Copyright (C) J.P.Bowen 1985|
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|Mnem. |Op|NVBDIZC|A#ZBIRX@|~|Description |Notes |
|------+--+-------+--------+-+---------------------+-----------|
|ADC s|6D|**---**| XxX XX|4|Add with Carry |A=A+s+C %|
|AND s|2D|*----*-| XxX XX|4|Logical AND |A=A&s %|
|ASL d|0E|*----**| xx |6|Arith. Shift Left |d={C,d,0}<-|
|ASLA |0A|*----**|X |2|Arith. Shift Left |A={C,d,0}<-|
|BBRb z|0F|-------| * X |2|Branch if Bit Reset |If s<b>=0 |
|BBSb z|8F|-------| * X |2|Branch if Bit Set |If s<b>=1 |
|BCC a|90|-------| X |2|Branch if Carry Clear|If C=0(4~)%|
|BCS a|B0|-------| X |2|Branch if Carry Set |If C=1(4~)%|
|BEQ a|F0|-------| X |2|Branch if Equal |If Z=1(4~)%|
|BIT s|2C|**---*-| Xxx |4|Bit Test |A&s $|
|BMI a|30|-------| X |2|Branch if Minus |If N=1(4~)%|
|BNE a|D0|-------| X |2|Branch if Not Equal |If Z=0(4~)%|
|BPL a|10|-------| X |2|Branch if Plus |If N=0(4~)%|
|BRA a|80|-------| X |2|Branch Always |PC=a (4~)%|
|BRK |00|--+-1--| X |7|Break(-[S]={PC+2,P}) |PC=[FFFEH] |
|BVC a|50|-------| X |2|Branch if Overflw Clr|If V=0(4~)%|
|BVS a|70|-------| X |2|Branch if Overflw Set|If V=1(4~)%|
|CLC |18|------0| X |2|Clear Carry flag |C=0 |
|CLD |D8|---0---| X |2|Clear Decimal mode |D=0 |
|CLI |58|----0--| X |2|Clear Int. disable |I=0 |
|CLV |B8|-0-----| X |2|Clear Overflow flag |V=0 |
|CMP s|CD|*----**| XxX XX|4|Compare |A-s |
|CPX s|EC|*----**| X** |4|Compare index reg. |X-s |
|CPY s|CC|*----**| X** |4|Compare index reg. |Y-s |
|DEC d|CE|*----*-| xx |6|Decrement |d=d-1 |
|DECA |3A|*----*-|X |6|Decrement Acc. |A=A-1 |
|DEX |CA|*----*-| X |2|Decrement index reg. |X=X-1 |
|DEY |88|*----*-| X |2|Decrement index reg. |Y=Y-1 |
|EOR s|4D|*----*-| XxX XX|4|Logical Exclusive OR |A=Axs %|
|INC d|EE|*----*-| xx |6|Increment |d=d+1 |
|INCA |1A|*----*-|X |6|Increment Acc. |A=A+1 |
|INX |E8|*----*-| X |2|Increment index reg. |X=X+1 |
|INY |C8|*----*-| X |2|Increment index reg. |Y=Y+1 |
|JMP s|4C|-------| * X|3|Jump |PC=s $|
|JSR s|20|-------| * |6|Jump to Subroutine |-[S]=PC+2=s|
|LDA s|AD|*----*-| XxX XX|4|Load Accumulator |A=s %|
|LDX s|AE|*----*-| Xyy |4|Load index register |X=s $%|
|LDY s|AC|*----*-| Xxx |4|Load index register |Y=s %|
|LSR d|4E|0----**| xx |6|Logical Shift Right |d=->{0,d,C}|
|LSRA |4A|0----**|X |2|Logical Shift Right |A=->{0,A,C}|
|NOP |EA|-------| X |2|No Operation | |
|ORA s|0D|*----*-| XxX XX|4|Logical Inclusive OR |A=Avs |
|PHA |48|-------| X |3|Push Accumulator |-[S]=A |
|PHP |08|-------| X |3|Push status register |-[S]=P |
|PHX |DA|-------| X |2|Push index register |-[S]=X |
|PHY |5A|-------| X |2|Push index register |-[S]=Y |
|PLA |68|-------| X |4|Pull Accumulator |A=[S]+ |
|PLP |28|*******| X |4|Pull status register |P=[S]+ |
|PLX |FA|-------| X |2|Pull index register |X=[S]+ |
|PLY |7A|-------| X |2|Pull index register |Y=[S]+ |
|RMBb d|07|-------| * |5|Reset Memory Bit |d<b>=0 |
|ROL d|2E|*----**| xx |6|Rotate Left |d={C,d}<- |
|ROLA |2A|*----**|X |2|Rotate Left Acc. |A={C,A}<- |
|ROR d|6E|*----**| xx |6|Rotate Right |d=->{C,d} |
|RORA |6A|*----**|X |2|Rotate Right Acc. |A=->{C,A} |
|RTI |40|*******| X |6|Return from Interrupt|{PC,P}=[S]+|
|RTS |60|-------| X |6|Return from Subr. |PC={[S]+}+1|
|SBC s|ED|*----**| XxX XX|4|Subtract with Carry |A=A-s-C %|
|SEC |38|------1| X |2|Set Carry flag |C=1 |
|SED |F8|---1---| X |2|Set Decimal mode |D=1 |
|SEI |78|----1--| X |2|Set Interrupt disable|I=1 |
|SMBb d|87|-------| * |5|Set Memory Bit |d<b>=1 |
|STA d|8D|-------| xX XX|4|Store Accumulator |d=A |
|STX d|8E|-------| y* |4|Store index register |d=X |
|STY d|8C|-------| x* |4|Store index register |d=Y |
|STZ d|9C|-------| xx |4|Store Zero |d=0 $|
|TAX |AA|*----*-| X |2|Transfer Accumulator |X=A |
|TAY |A8|*----*-| X |2|Transfer Accumulator |Y=A |
|TRB d|1C|**---*-| ** |2|Test and Reset Bits |d=~A&d |
|TSB d|0C|**---*-| ** |2|Test and Set Bits |d=Avd |
|TSX |BA|*----*-| X |2|Transfer Stack ptr |X=S |
|TXA |8A|*----*-| X |2|Transfer index reg. |A=X |
|TXS |9A|-------| X |2|Transfer index reg. |S=X |
|TYA |98|*----*-| X |2|Transfer index reg. |A=Y |
|------+--+-------+--------+-+---------------------------------|
| |XX| | |X|Hexadecimal opcode/no. of cycles |
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|Mnemonic |NVBDIZC|A#ZBIRX@|Description |
|---------+-------+--------+-----------------------------------|
| P |-*01+ | |Unaff/affected/reset/set/stack set |
| N |N | |Negative status (Bit 7) |
| V | V | |Overflow status (Bit 6) |
| B | B | |Break command indicator (Bit 4) |
| D | D | |Decimal mode control (Bit 3) |
| I | I | |Interrupt disable control (Bit 2) |
| Z | Z | |Zero status (Bit 1) |
| C | C| |Carry status (Bit 0) |
|------------------+--------+----------------------------------|
| |* |Only non-indexed mode valid |
| |x |X and non-indexed mode valid |
| |y |Y and non-indexed mode valid |
| |X |All modes valid |
|-----------------+--------+-----------------------------------|
| | |Add XXH to opcode |+XXH| |
| | |Subtract XXH from opcode |-XXH| |
| | |Add X to number of cycles | |+X|
| | |Subtract X from cycles | |-X|
|-----------------+--------+---------------------------+----+--|
| b | |Bit number (b=0-7) |+b0H| |
| A |A |Accumulator | | |
| #n | # |Immediate |-0CH|-2|
| #n | # | ditto (opcode = XDH) | X9H| 2|
| BIT #n | # | ditto (special case) | 89H| 2|
| <n | Z |Zero page |-08H|-1|
| STZ n | Z | ditto (special case) | 64H| 3|
| n | * |Zero page (direct mode) |-08H|-1|
| n,X | x |Zero page indexed (X) |+08H|+0|
| n,Y | y |Zero Page indexed (Y) |+08H|+0|
| >nn | B |Absolute |+00H|+0|
| nn | * |Absolute (extended mode) |+00H|+0|
| nn,X | x |Absolute indexed (X) |+10H|+0|
| nn,Y | y |Absolute indexed (Y) |+0CH|+0|
| LDX nn,Y | y | ditto (special case) | BEH| 4|
| | I |Implicit | | |
| a | R |Relative (PC=PC+1+offset) | |+2|
| [nn,X] | x |Indexed indirect (X) |-0CH|+2|
| [nn],Y | y |Indirect indexed (Y) |+04H|+1|
| [nn] | @|Absolute indirect |+05H|+1|
| JMP [nn] | @| ditto (special case) | 6CH| 5|
|--------------------------+-----------------------------------|
| A |Accumulator (8-bit) |
| P |Processor status register (8-bit) |
| PC |Program Counter (16-bit) |
| S |Stack pointer (9-bit, MSB=1) |
| X |Index register X (8-bit) |
| Y |Index register Y (8-bit) |
|--------------------------+-----------------------------------|
| a |Relative address (-128 to +127) |
| b |Bit number (0 to 7) |
| d |Destination |
| n |8-bit expression (0 to 255) |
| nn |16-bit expression (0 to 65535) |
| s |Source |
| z |Zero page, relative address (n,a) |
|--------------------------+-----------------------------------|
| + - |Arithmetic addition/subtraction |
| * / |Arithmetic multiplication/division |
| & ~ |Logical AND/NOT |
| v x |Logical inclusive/exclusive OR |
| <- -> |Rotate left/right |
| [ ] |Indirect addressing |
| [ ]+ |Post-increment indirect addressing |
| -[ ] |Pre-decrement indirect addressing |
| { } |Combination of operands |
| < > |Bit number |
| $ |Special case for addressing mode |
| % |~s=~s+1 if crossing page boundary |
|--------------------------+-----------------------------------|
|0000H to 00FFH |Page 0 (see zero page addressing) |
|0100H to 01FFH |Page 1 (stack area, 01FFH = start) |
|XX00H to XXFFH |Page n (where n=XXH) |
|FFFAH to FFFBH |Non maskable interrupt vector(NMI) |
|FFFCH to FFFDH |Reset (RES) vector |
|FFFEH to FFFFH |Interrupt Request vector (IRQ) |
|FFFEH to FFFFH |Break command vector (see BRK) |
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