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-*[ NES ASM v2.51 ]*-
---------------
Instructions set
----------------
+------+----------+-----------------------------+
| | NVTBDIZC | Description |
+------+----------+-----------------------------+
| ADC | XX0---XX | Add with Carry |
| AND | X-0---X- | Logical AND |
| ASL | X-0---XX | Arithmetic Shift left |
| BCC | --0----- | Branch if Carry Clear |
| BCS | --0----- | Branch if Carry Set |
| BEQ | --0----- | Branch if Equal |
| BIT | XX0---X- | Bit Test |
| BMI | --0----- | Branch if Minus |
| BNE | --0----- | Branch if Not Equal |
| BPL | --0----- | Branch if Plus |
| BRA | --0----- | Branch Always |
| BRK | --0----- | Break |
| BVC | --0----- | Branch if Overflow Clear |
| BVS | --0----- | Branch if Overflow Set |
| CLC | --0----0 | Clear Carry flag |
| CLD | --0-0--- | Clear Decimal flag |
| CLI | --0--0-- | Clear Interrupt disable |
| CLV | -00----- | Clear Overflow flag |
| CMP | X-0---XX | Compare A with source |
| CPX | X-0---XX | Compare X with source |
| CPY | X-0---XX | Compare Y with source |
| DEC | X-0---X- | Decrement |
| DEX | X-0---X- | Decrement X |
| DEY | X-0---X- | Decrement Y |
| EOR | X-0---X- | Logical Exclusive OR |
| INC | X-0---X- | Increment |
| INX | X-0---X- | Increment X |
| INY | X-0---X- | Increment Y |
| JMP | --0----- | Jump |
| JSR | --0----- | Jump to Sub Routine |
| LDA | X-0---X- | Load A |
| LDX | X-0---X- | Load X |
| LDY | X-0---X- | Load Y |
| LSR | 0-0---XX | Logical Shift Right |
| NOP | --0----- | No Operation |
| ORA | X-0---X- | Logical inclusive OR |
| PHA | --0----- | Push A |
| PHP | --0----- | Push P |
| PLA | X-0---X- | Pull A |
| PLP | XXXXXXXX | Pull P |
| ROL | X-0---XX | Rotate Left |
| ROR | X-0---XX | Rotate Right |
| RTI | XXXXXXXX | Return from Interrupt |
| RTS | --0----- | Return from Sub Routine |
| SBC | XX0---XX | Substract with Carry |
| SEC | --0----1 | Set Carry flag |
| SED | --0-1--- | Set Decimal flag |
| SEI | --0--1-- | Set Interrupt disable |
| STA | --0----- | Store A |
| STX | --0----- | Store X |
| STY | --0----- | Store Y |
| TAX | X-0---X- | Transfer A to X |
| TAY | X-0---X- | Transfer A to Y |
| TSX | X-0---X- | Transfer S to X |
| TXA | X-0---X- | Transfer X to A |
| TXS | --0----- | Transfer X to S |
| TYA | X-0---X- | Transfer Y to A |
+------+----------+-----------------------------+
Operand syntax
--------------
A accumulator
#i immediate
<n zero page
<n,X zero page indexed by X
<n,Y zero page indexed by Y
[n] indirect (*)
[n,X] indirect pre-indexed by X (*)
[n],Y indirect zero page post-indexed by Y
r relative
n absolute
n,X absolute indexed by X
n,Y absolute indexed by Y
(*) can be zero page or absolute
--
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