Curriculum

SIC/XE Program to arrange an array of 100 words in ascending order

This System Software program demonstrates an SIC/XE program to arrange 100 words in ascending order and storing the result in the array variable BETA.

Suppose that ALPHA is an array of 100 words. Write a sequence of instruction for SIC/XE to arrange the 100 words in ascending order and store result in an array BETA of 100 elements.

Source Code

Line Number	Code	Comments
1	SORT START 0
2	OUTER LDX INDEX
3	LDS ARR1,X
4	LDX #0
5	INNER LDT ARR1,X
6	COMPR S,T
7	JLT LOOP
8	JEQ LOOP
9	RMO S,A
10	RMO T,S
11	RMO A,T
12	RMO X,A
13	LDX INDEX
14	STS ARR1,X
15	RMO A,X
16	STT ARR1,X
17	LOOP RMO X,A
18	ADD #3
19	COMP LENGTH
20	RMO A,X
21	JLT INNER
22	LDA INDEX
23	ADD #3
24	COMP LENGTH
25	STA INDEX
26	JLT OUTER
27	ARR1 RESW 10
28	LENGTH WORD 30
29	INDEX WORD 0

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