求大神解释一下这反汇编后的程序是什么作用

0373H 78 7F MOV R0,#7FH
0375H E4 CLR A
0376H F6 MOV @R0,A
0377H D8 FD DJNZ R0,0376H
0379H 75 81 5C MOV SP,#5CH
037FH 02 00 26 LJMP 0026H
0026H E4 CLR A
0027H F5 3F MOV 3FH,A
0029H F5 40 MOV 40H,A
002BH F5 44 MOV 44H,A
002DH F5 45 MOV 45H,A
002FH F5 46 MOV 46H,A
0031H F5 47 MOV 47H,A
0033H F5 48 MOV 48H,A
0035H F5 49 MOV 49H,A
0037H F5 4A MOV 4AH,A
0039H F5 4B MOV 4BH,A
003BH F5 4C MOV 4CH,A
003DH F5 4D MOV 4DH,A
003FH F5 4E MOV 4EH,A
0041H 75 4F 01 MOV 4FH,#01H
0044H 75 50 01 MOV 50H,#01H
0047H F5 11 MOV 11H,A
0049H 75 90 0F MOV P1,#0FH
004CH 75 B0 BF MOV P3,#0BFH
004FH 12 05 A5 LCALL 05A5H
05A5H 75 90 FF MOV P1,#0FFH
05A8H 75 91 F0 MOV 91H,#0F0H
05ABH E4 CLR A
05ACH F5 92 MOV 92H,A
05AEH F5 C6 MOV 0C6H,A
05B0H 75 C5 80 MOV 0C5H,#80H
05B3H 7F 02 MOV R7,#02H
05B5H FE MOV R6,A
05B6H 02 04 DC LJMP 04DCH
04DCH 8E 53 MOV 53H,R6
04DEH 8F 54 MOV 54H,R7
04E0H E4 CLR A
04E1H FB MOV R3,A
04E2H F5 55 MOV 55H,A
04E4H F5 56 MOV 56H,A
04E6H EB MOV A,R3
04E7H C3 CLR C
04E8H 95 54 SUBB A,54H
04EAH E4 CLR A
04EBH 95 53 SUBB A,53H
04EDH 50 28 JNC 0517H
0617H RET