求单纯形法的算法?

DATA SEGMENT
SSTR DB'ABCDEFG……Z'
DATA ENDS
EXTR SEGM ENT
DSTR DB 26 DUP(?)
EXTR ENDS

CODE SEG MENT
ASSUME
CS:CODE DS:DATA
ES:EXTR
START:MOV AX DATA
MOV DS AX
MOV AX EXTR
MOV ES AX
MOV SI OFFSET SSTR
MOV DI OFFSET DSTR
MOV CX 26
CLD
REP MOVSB
MOV AH 4CH
INT 21H
CODE (ENDS)
END START