OR - M68K instruction reference

XNZVC –●●00

● set from the result
0 always 0
– not changed

Forms

or ,

Operands

<ea>: An operand using one of the instruction’s supported addressing modes, such as d0, (a0)+ or 4(a1). It may name a register, memory or an immediate value. More
#imm: An immediate value written after #: a number, character or label, such as #10, #$FF or #'a'. It must fit the operation’s size: byte -128 to 255, word -32768 to 65535, or long -2147483648 to 4294967295; signed and unsigned spellings are accepted. More

move.l #%11110000, d0
move.l #%10101010, d1
or.b d1, d0 ; d0 = %11111010

* --- Use for setting specific bits ---
move.l #$00, d2
or.b #%00000101, d2 ; set bits 0 and 21
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