Introduction :
Introduction Instruction and data stored in memory come from input device.Computational results to the user through some output device.
15 12 11 0
input-output insrtuction
(opcode =111, I = 1) 1 1 1 1 I/O opertaion
Input – Output Instructions :
Input – Output Instructions
Input-Output configuration :
Input-Output configuration The serial information from the keyboard is shifted into the input register INPR.
The serial information for the printer is stored in output register OUTR.
These two register s communicate with the communication interface serially and with AC in parallel.
Input – Output Instructions :
Input – Output Instructions AC OUTR INPR FGO FGI A 0100001 Keyboard Printer Reciever
interface Transmiter
interface A 0100001 00100001 1 AC(0-7) INPR FGI 0 00100001 0 , OUTR AC(0-7), FGO 0 1 0 A A 00100001 00100001 If (FGI ==1) then (PC PC+1) PC 001 If (FGO == 1) then (PC PC+1) IEN 1 IEN 1 0 THE END IEN 0