nhờ giải thích code điều khiển mạch quang báo led

[10cddt]

;++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
HANG DATA P0
CLK BIT P2.4
DT BIT P2.5
RCK BIT P2.6
ORG 0000H
MAIN:
MOV A,#0
MOV DPTR,#MACHU
LAP:
MOV R2,#10
LAP1:
LCALL HIENTHI
DJNZ R2,LAP1
INC DPTR
MOV A,DPL
CJNE A,#LOW(MACHU+250),LAP
LJMP MAIN
HIENTHI:
MOV R0,#0 ; NHAP GIA TRI BAN DAU
SETB DT
;CLR DT
SCAN:
CLR CLK ; TICH CUC 1 COT
CLR RCK
SETB CLK
SETB RCK
MOV A,R0
MOVC A,@A+DPTR
CPL A
MOV HANG,A ; XUAT DU LIEU RA HANG 1
INC R0
MOV A,R0
LCALL DELAY ; TRE~
MOV HANG,#00H ;CHONG LEM
;SETB DT
CLR DT ;CHONG LEM
LCALL DELAY1
CJNE R0,#49,SCAN ; KIEM TRA QUET DU 32 COT
RET
;----------------------------------------------------------
DELAY:
MOV TMOD,#02H
MOV TH0,#HIGH(-1500)
MOV TL0,#LOW(-1500)
SETB TR0
JNB TF0,$
CLR TR0
CLR TF0
RET
;----------------------------------------------------------
DELAY1:
PUSH 00H
PUSH 01H
MOV R1,#1
LOOP1:
MOV R0,#50
DJNZ R0,$
DJNZ R1,LOOP1
POP 01H
POP 00H
RET
;----------------------------------------------------------
MACHU:
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0BEH,080H,0BEH,0BEH,0C1H ;//D
DB 0FFH,0FFH ;SPACE
DB 080H,0F7H,0F7H,0F7H,080H ;//H
DB 0FFH,0FFH ;SPACE
DB 0C1H,0BEH,0BEH,0BEH,0DDH ;//C
DB 0FFH,0FFH ;SPACE
DB 080H,0FDH,0FBH,0F7H,080H ;//N
DB 07FH,07FH,07FH,07FH,07FH ;//_
DB 0FEH,0FEH,080H,0FEH,0FEH ;//T
DB 0FFH,0FFH ;SPACE
DB 080H,0F7H,0F7H,0F7H,080H ;//H
DB 0FFH,0FFH ;SPACE
DB 0C0H,0BFH,0BFH,0BFH,0C0H ;//U
DB 0FFH,0FFH ;SPACE
DB 0C1H,0BEH,0BEH,0BEH,0DDH ;//C
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 080H,0F6H,0F6H,0F6H,0F9H ;//P
DB 0FFH,0FFH ;SPACE
DB 080H,0F7H,0F7H,0F7H,080H ;//H
DB 0FFH,0FFH ;SPACE
DB 083H,0F5H,0F6H,0F5H,083H ;//A
DB 0FFH,0FFH ;SPACE
DB 080H,0FDH,0F3H,0FDH,080H ;//M
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FEH,0FEH,080H,0FEH,0FEH ;//T
DB 0FFH,0FFH ;SPACE
DB 080H,0F6H,0F6H,0F6H,0F9H ;//P
DB 00FFH,9FH,9FH,0FFH,0FFH
DB 080H,0F7H,0F7H,0F7H,080H ;//H
DB 0FFH,0FFH ;SPACE
DB 0C1H,0BEH,0BEH,0BEH,0DDH ;//C
DB 0FFH,0FFH ;SPACE
DB 080H,0FDH,0F3H,0FDH,080H ;//M
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 080H,0F7H,0EBH,0DDH,0BEH ;//K
DB 0FFH,0FFH ;SPACE
DB 080H,0F7H,0F7H,0F7H,080H ;//H
DB 0FFH,0FFH ;SPACE
DB 0C1H,0BEH,0BEH,0BEH,0C1H ;//O
DB 0FFH,0FFH ;SPACE
DB 083H,0F5H,0F6H,0F5H,083H ;//A
DB 0FFH,0C9H,0C9H,0FFH,0FFH ;//:
DB 0BEH,080H,0BEH,0BEH,0C1H ;//D
DB 0FFH,0FFH ;SPACE
DB 0FFH,0BEH,080H,0BEH,0FFH ;//I
DB 0FFH,0FFH ;SPACE
DB 080H,0B6H,0B6H,0B6H,0BEH ;//E
DB 0FFH,0FFH ;SPACE
DB 080H,0FDH,0FBH,0F7H,080H ;//N
DB 07FH,07FH,07FH,07FH,07FH ;//_
DB 0BEH,080H,0BEH,0BEH,0C1H ;//D
DB 0FFH,0FFH ;SPACE
DB 0FFH,0BEH,080H,0BEH,0FFH ;//I
DB 0FFH,0FFH ;SPACE
DB 080H,0B6H,0B6H,0B6H,0BEH ;//E
DB 0FFH,0FFH ;SPACE
DB 080H,0FDH,0FBH,0F7H,080H ;//N
DB 0FFH,0FFH,0FFH,0FFH,0FFH ;SPACE
DB 0FEH,0FEH,080H,0FEH,0FEH ;//T
DB 0FFH,0FFH ;SPACE
DB 0C0H,0BFH,0BFH,0BFH,0C0H ;//U


END

nhờ mấy a giải thik dùm e cái code này.code này viết để điều khiển mạch quang báo led ma trận dùng AT 89s52.code này là code asm.