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Bananattack edited this page Mar 5, 2011
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The Language Reference - Instructions - or
The code a: or src performs a bitwise OR of the accumulator with contents of source argument src. The zero and negative p-flags are modified accordingly.
| Usage | Opcode, 6502 mnemonic |
|---|---|
a: or #immediate |
0x09, ora
|
a: or @direct |
0x0D, ora
|
a: or @direct[x] |
0x1D, ora
|
a: or @direct[y] |
0x19, ora
|
a: or @zp |
0x05, ora
|
a: or @zp[x] |
0x15, ora
|
a: or @[zp[x]] |
0x01, ora
|
a: or @[zp][y] |
0x11, ora
|