Comments

; This is a comment

Labels

label1:   ; a label

Opcodes

SEI
CLC

; lowercase
inx
bne label1

Assembler directives

.segment CODE
.word $07d3

Registers

ASL A  ; "A"
LDA label1,x  ; "x"

Strings

.include "header.asm"

Numbers

LDA #127
STA $80f0
LDY #%01011000