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or

Logical OR

Performs a logical OR of the first and second operands and stores the result in the second operand.

Sizes .b .w .l, .w by default

Used in
XNZVC –●●00
  • ● set from the result
  • 0 always 0
  • – not changed

Forms

Operands

<ea>
An operand using one of the addressing modes listed for this form. The list determines whether it can be a register, memory or an immediate value. With opt p=68020, an allowed d(An,Xn) or d(PC,Xn) mode also permits the corresponding 68020 indexed and memory indirect forms. See 68020 addressing. 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 2