(IY+d) <- (IY+d) + 1
The contents of Index Register IY (register pair IY) are added to the two's-complement displacement integer, d, to point to an address in memory. The contents of this address are then incremented.
|S||is set if result is negative, otherwise it is reset.|
|Z||is set if result is 0, otherwise it is reset.|
|H||is set if carry from bit 3, otherwise it is reset.|
|P/V||is is set if (IY+d) was $7F before operation, otherwise it is reset.|
|C||is not affected.|
If Index Register IY are $2020 and memory location $2030 contains byte $34, then upon execution of
memory location $2030 contains $35.