INS Increment Register Pair Instruction
Contents of the registers pair RP will be incremented by one and the result will be stored in the same register pair. It is also an exceptional case in accumulator is not used as one of the operand. The instruction format is
INS RP (RP - RP + 1)
Flags : No flags are modified.
INX B means increment register pair BC.
INX D means increment register pair DE.
INX H means increments registers pair HL.