API Reference ex6502 v0.1.0

Documentation for Ex6502.

An emulation of the 6502 CPU as produced by WDC (WDC 65C02).

Handles executing opcodes.

Add the value of memory and carry to accumulator storing result in accumulator

Transfer to the adder and perform a bit-by-bit AND operation

Shift the accumlator or address 1 bit left

Take a conditional branch if the carry bit is reset (clear/0)

Take a conditional branch if the carry bit is set (1)

Branch on result zero.

Perform and AND between the location and the accumulator

Branch on result minus

Branch on result not zero

Branch on result plus

Unconditional branch

Break

Branch on overflow clear

Branch on overflow set

Clear carry flag

Clear decimal mode flag

Clear interrupt disable flag

Clear overflow flag

Subtracts the contents of memory from the contents of the accumulator, affecting flags

Subtracts the contents of the x register from the memory only affecting flags

Subtracts the contents of the Y register from the memory only affecting flags

Subtract 1, in two's complement, from the memory location

Subtract 1, in two's complement, from the X register

Subtract 1, in two's complement, from the Y register

Perform an exclusive OR (XOR) operation with the accumulator eor the location

Add 1 to the memory location

Add 1 to the X register, not affecting carry

Add 1 to the Y register, not affecting carry

Change program counter to memory value

Transfer control of the PC to a subroutine location

Load accumulator (register a) from memory

Load register x from memory

Load register y from memory

Shift the accumlator or address 1 bit right

No operation

Perform an OR operation with the accumulator or a the location

Transfer the value of the accumulator to the stack

Transfer the value of the processor status register to the stack

Transfer the value of the X register to the stack

Transfer the value of the Y register to the stack

Transfer the value from the current stack pointer to the accumulator

Transfer the value from the stack to the processor status register

Transfer the value from the stack to the X register

Transfer the value from the stack to the Y register

Rotate the accumlator or address 1 bit left

Rotate the accumlator or address 1 bit right

Return from interrup

Return from subroutine

Subtract the value of memory and borrow (carry) from accumulator storing result in accumulator

Set carry flag

Set decimal mode

Set interrupt disable

Transfer the value in the X register to memory

Transfer the value in the Y register to memory

Transfer the value 0 to memory

Transfer the value of the a register to the x register

Transfer the value of the a register to the y register

Test and reset bits in memory, using the accumulator as a test and reset mask.

Test and sets bits in memory, using the accumulator as a test and set mask.

Transfer the value of the stack pointer to the x register

Transfer the value of the x register to the accumulator

Transfer the value of the x register to the stack pointer

Transfer the value of the Y register to the accumulator