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The 68000's Instruction Set
Condition codes: X N Z V C
- * * * 0
The X-bit is not affected by a division. The N-bit is set if the
quotient is negative. The Z-bit is set if the quotient is zero. The V-
bit is set if division overflow occurs (in which case the Z- and N-
bits are undefined). The C-bit is always cleared.
Source operand addressing modes
EOR Exclusive OR logical
Operation: [destination] ← [source] ⊕ [destination]
Syntax: EOR Dn,<ea>
Sample syntax: EOR D3,-(A3)
Attributes: Size = byte, word, longword.
Description: EOR (exclusive or) the source operand with the destination
operand and store the result in the destination location. Note that
the source operand must be a data register and that the operation
EOR <ea>,Dn is not permitted.
Application: The EOR instruction is used to toggle (i.e., change the state of)
selected bits in the operand. For example, if [D0] = 00001111, and
[D1] = 10101010, the operation EOR.B D0,D1 toggles bits 0 to 3 of
D1 and results in [D1] = 10100101.
Condition codes: X N Z V C
- * * 0 0
Destination operand addressing modes
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