INX Instruction (Increment Index Register X)

Increments the value of index register X.

INX Overloads

Flags Affected

n-----z-

n: Set to the MSB of the incremented result
z: Set if the incremented result is 0

Examples

A loop that fills memory

    ; fill 32 bytes from $7E:2000 with $FF (A is 8-bit, X is 16-bit)
    LDA.b #$FF
    LDX.w #$0000
.loop
    STA.l $7E2000,X
    INX
    CPX.w #$0020
    BNE .loop

When processing a table of 16-bit values in order, use two INX instructions in a row to advance 2 bytes at a time.

See also

DEC instruction
DEX instruction
DEY instruction
INC instruction
INY instruction