A <- A | (IY+d)
The contents of the Index (register pair IY) Register is added to a two's complement displacement d to point to an address in memory. A logical OR operation is performed between the contents of this address and the contents in the Accumulator, the result is stored in the Accumulator.
|S||is set if result is negative, otherwise it is reset.|
|Z||is set if result is 0, otherwise it is reset.|
|P/V||is reset if overflow, otherwise it is reset|
If the Accumulator contains $12 (0001 0010), Index Register IY contains $1000, and memory location $1005 contains $48 (0100 1000), then upon the execution of
the Accumulator contains $5A (0101 1010).