[destination] ← [source] + [destination]
OR <ea>,Dn
OR Dn,<ea>Size byte, word, longword
OR the source operand to the destination operand, and store the result in the destination location.
The OR instruction is used to set selected bits of the operand. For example, we can set the four most-significant bits of a longword operand in D0 by executing:
OR.L #$F0000000,D0
| X | N | Z | V | C |
|---|---|---|---|---|
| - | * | * | 0 | 0 |
| Dn | An | (An) | (An)+ | ‑(An) | (d,An) | (d,An,Xi) | ABS.W | ABS.L | (d,PC) | (d,PC,Xn) | imm |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Dn | An | (An) | (An)+ | ‑(An) | (d,An) | (d,An,Xi) | ABS.W | ABS.L | (d,PC) | (d,PC,Xn) | imm |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
From MOTOROLA M68000 FAMILY Programmer's reference manual. Copyright 1992 by Motorola Inc./NXP. Adapted with permission.