📄 display.asm
字号:
NAME DISPLAY
?PR?_DISPLAY?DISPLAY SEGMENT CODE
?CO?_DISPLAY?DISPLAY SEGMENT DATA
EXTRN CODE (_DELAY)
PUBLIC _DISPLAY
RSEG ?CO?_DISPLAY?DISPLAY
?_DISPLAY?BYTE:
DISPBIT: DS 1
DISPNUM: DS 1
RSEG ?PR?_DISPLAY?DISPLAY
_DISPLAY: PUSH ACC
PUSH DPH
PUSH DPL
PUSH PSW
INC DISPNUM
MOV A,DISPNUM
CJNE A,#4D,DISP1
DISP1: JC DISP2
MOV DISPNUM,#00H
MOV DISPBIT,#0FEH
DISP2: MOV A,R1
ADD A,DISPNUM
MOV R0,A
MOV A,@R0
MOV DPTR,#DISPTABLE
MOVC A,@A+DPTR
MOV P0,A
MOV A,DISPNUM
CJNE A,#2D,DISP3
CLR P0.7
DISP3: MOV P2,DISPBIT
MOV R6,#00H
MOV R7,#0AH
LCALL _DELAY
MOV P0,#0FFH
MOV P2,#0FFH
MOV A,DISPBIT
RL A
MOV DISPBIT,A
POP PSW
POP DPL
POP DPH
POP ACC
RET
DISPTABLE:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,88H,83H,0C6H,0A1H,86H,8EH,0BFH,0FFH
END
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