北京工业大学 微机原理与接口技术 实验九 数码转换3 十六进制数转换为ASCII码

十六进制数转换为ASCII码

DATASG  SEGMENT
        DATA1 DW 048CH
              DB 4 DUP(?)
        DATA2 DB 4 DUP(?), '$'
DATASG  ENDS
CODESG  SEGMENT
        ASSUME CS:CODESG
        ASSUME DS:DATASG
BEGIN:  MOV AX, DATASG
        MOV DS, AX
        LEA SI, DATA1
        LEA DI, DATA1
        MOV CX, 3
        ADD DI, 2
PART:   MOV AX, [SI]
        MOV BL, CL
SH:     SHR AX, 4
        LOOP SH
        MOV CL,BL
        AND AX, 0FH
        MOV [DI], AL
        INC DI
        LOOP PART
        MOV AX, [SI]
        AND AX, 0FH
        MOV [DI], AL
        MOV CX, 4
        ADD SI, 2