System Software – SIC/XE Program to set 100 elements of the array to 0 using immediate addressing mode

Problem Statement

Assume that ALPHA is an array of 100 words. Write a sequence of instructions for SIC/XE to set all 100 elements of the array to 0. Use immediate addressing and register-to-register instructions to make the process as efficient as possible.

Solution

Line Number	Code	Comments
1	LDS #3
2	LDT #300
3	LDX #0
4	LOOP LDA #0
5	STA ALPHA, X
6	ADDR S, X
7	COMPR X, T
8	JLT LOOP
9	ALPHA RESW 100