Matrix 8x8 - Asm - Simple

Code:
ORG 00H
MAIN:
LCALL SCANMT
SJMP MAIN
SCANMT:
MOV R1,#0
SPEED:
MOV R5,#10
CH:
MOV R0,#00H
START:
MOV A,R0
MOV DPTR,#COT
MOVC A,@A+DPTR
MOV P2,A

MOV A,R0
ADD A,R1
MOV DPTR,#HANG
MOVC A,@A+DPTR
MOV P3,A

ACALL DELAY
INC R0
CJNE R0,#8,START
DJNZ R5,CH
INC R1
CJNE R1,#40,SPEED
RET
DELAY:
MOV TMOD,#01H
NAP:
MOV TH0,#0FCH
MOV TL0,#18H
SETB TR0
WAIT_OVER:
JNB TF0,WAIT_OVER
CLR TR0
CLR TF0
RET
COT: DB 01H,02H,04H,08H,10H,20H,40H,80H
HANG:
DB     7EH,81H,81H,81H,81H,0H,0H,0H ;C
DB     0H,0FFH,18H,18H,18H,18H,0FFH,0H   ;H
DB     0H,82H,0FEH,0FEH,82H,0H,0H,0H  ;I
DB     0H,0H,0FFH,11H,11H,11H,0EH,0H  ;P
END

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