miaocongjishu.asm

来自「让你更方便的了解到计算机组成的原理」· 汇编 代码 · 共 36 行

        ORG     0000H
        SJMP    PROG10
        ORG     02A0H
PROG10: MOV     SP,  #50H
        MOV     TMOD,    #04H   ;T0
        MOV     TL0,     #0
        MOV     TH0,     #0
        SETB    TR0
AA:     MOV     A,       TL0
        MOV     60H,     A
        MOV     A,       TH0
        MOV     61H,     A
        LCALL   BINBCD
        MOV     A,    R4
        LCALL   PRO             ;BCD码分离
        MOV     7EH,     R2
        MOV     7DH,     R3
        MOV     A,       R5
        LCALL   PRO
        MOV     7CH,    R2
        MOV     7BH,    R3
        MOV     A,      R6
        LCALL   PRO
        MOV     7AH,    R2
        MOV     79H,    R3
        LCALL   DIR             ;调用显示子程序
        SJMP    AA
PRO:    MOV     B,      A       ;BCD码分离
        SWAP    A
        ANL     A,      #0FH
        MOV     R2,     A
        MOV     A,      B
        ANL     A,      #0FH
        MOV     R3,     A
        RET
BINBCD: MOV     R1,     71H