System Software – SIC/XE Program to clear 20 byte string to empty

Published on June 27, 2016 by Senthil Kumar

Filed under Assembly Language

Last modified June 27, 2016

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Problem Statement

Write a sequence of instructions for SIC/XE to clear a 20-byte string to all blanks.

Solution

Line Number(ac) Code Description
1 LDX ZERO  
2 LOOP LDCH BLANK  
3 STCH STR1,X  
4 TIX TWENTY  
5 JLT LOOP  
6 STR1 RESW 20  
7 BLANK BYTE C ‘ ‘  
8 ZERO WORD 0  
9 TWENTY WORD 20  

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