汇编语言习题课课件

6.3已知两个带符号数X,Y分别存放在ADRX,ADRY单元,若两数同时为正,将FLAG单元置0,若同时为负,将FLAG单元置1,否则FLAG单元置全1.

开始AL=ADRX，BL=ADRYAL是正数？BL是正数？FLAG置全1结束YBL是正数？FLAG=1NYNNFLAG=0Y6.3已知两个带符号数X,Y分别存放在ADRX,ADRY1DSEG SEGMENTADRX DB 01ADRY DB 02FLAG DB ?DSEG ENDSCSEG SEGMENT ASSUME CS:CSEG,DS:DSEGSTART: MOV AX,DSEG MOV DS,AX MOV AL,ADRX MOV BL,ADRY AND AL,AL JS SAME1 AND BL,BL JS SAME2 MOV FLAG,0 JMP EXITSAME1: AND BL,BL JS DIF SAME2: MOV FLAG,0FFH JMP EXITDIF: MOV FLAG,1EXIT: MOV AH,4CH INT 21HCSEG ENDS END STARTDSEG SEGMENT26.3已知X为字数据,存放在ADR单元,若X中含有偶数个1,将FLAG单元置1,否则FLAG单元置0.

开始AX=ADRAL偶1？AH偶1？FLAG置0结束YBL偶1？FLAG置全1NYNNFLAG置全1Y6.3已知X为字数据,存放在ADR单元,若X中含有偶数个13DSEG SEGMENTADR DW 1234HFLAG DB ?DSEG ENDSCSEG SEGMENT ASSUME CS:CSEG,DS:DSEGSTART: MOV AX,DSEG MOV DS,AX MOV AX,ADR AND AL,AL JNP ABB1 AND AH,AH JNP ABB2ABB3: MOV FLAG,1 JMP EXITABB1: AND AH,AH JNP ABB3 ABB2: MOV FLAG,0EXIT: MOV AH,4CH INT 21HCSEG ENDS END STARTDSEG SEGMENT46.9下列程序有错,找出.已知程序欲完成的功能是从两个无符号数中选出较大者送入MAX单元,若两者相同,将MAX清0.SEGA SEGMENTDAX: DW 200DAY DB 1000HMAX DB 0,0SEGA ENDSCSEG SEGMENT ASSUME CS:CSEG ASSUME DS:SEGA CMP AX,DAX JG XGY JZ ZERO MOV AX,DAYXGY: MOV MAX,AX HLT ENDS END START 6.9下列程序有错,找出.已知程序欲完成的功能是从两个无符号5SEGA SEGMENTDAX: DW 200DAY DB 1000HMAX DB 0,0SEGA ENDSCSEG SEGMENT ASSUMECS:CSEG ASSUMEDS:SEGA CMP AX,DAX

JG XGY JZ ZERO MOV AX,DAYXGY: MOV MAX,AXZERO HLT

ENDS END START DAX DW 200DAY DW 1000HSTART: MOVAX,SEGA MOVDS,AX MOVAX,DAYJA XGYMOV AX,DAXJMP EXITMO