9.) A 8255 PPIO circuit is connected to system bus of the 8085 microprocessor. The base address of this circuit is 68H. The CPU executes the program see below. What is output combination of the PC port, when the CPU reaches the HLT instruction? PPIO PA EQU 68H PPIO_PS PPIO PC EQU 69H EQU 6AH PPIO_CONT EQU 6BH FULL 1 EQU FFH MODE_COMM EQU 80H COMMI EQU 04H COMM2 EQU 08H COMM3 EQU ОАН ;PPIO INITIALIZATION NAME A, MODE COMM PPIO_CONT PPIO INIT A, FULL 1 PPIO PC MVI OUT MVI OUT MVI OUT LATER A, COMMI MOD_POPORT: PPIO CONT A, COMM2 PPIO CONT MVI A, COMM3 OUT PPIO_CONT HLT Binary output combination of PC port: Hexadecimal output combination of PC port: A A A A A MVI OUT ******
9.) A 8255 PPIO circuit is connected to system bus of the 8085 microprocessor. The base address of this circuit is 68H. The CPU executes the program see below. What is output combination of the PC port, when the CPU reaches the HLT instruction? PPIO PA EQU 68H PPIO_PS PPIO PC EQU 69H EQU 6AH PPIO_CONT EQU 6BH FULL 1 EQU FFH MODE_COMM EQU 80H COMMI EQU 04H COMM2 EQU 08H COMM3 EQU ОАН ;PPIO INITIALIZATION NAME A, MODE COMM PPIO_CONT PPIO INIT A, FULL 1 PPIO PC MVI OUT MVI OUT MVI OUT LATER A, COMMI MOD_POPORT: PPIO CONT A, COMM2 PPIO CONT MVI A, COMM3 OUT PPIO_CONT HLT Binary output combination of PC port: Hexadecimal output combination of PC port: A A A A A MVI OUT ******
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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