IN

Opcode Format	Mnemonic	Description
1100110P	IN	The IN mnemonic is used to read a 8-bit long value from Input Port A or B and stores the value in the General Purpose Register XL.

 

Bits	Description
P	Input Port: 0: Input Port A 1: Input Port B

 
The following animation shows how the IN opcode is executed physically on the CPU.