匯編語言習(xí)題課課件

6.3已知兩個(gè)帶符號數(shù)X,Y分別存放在ADRX,ADRY單元,若兩數(shù)同時(shí)為正,將FLAG單元置0,若同時(shí)為負(fù),將FLAG單元置1,否則FLAG單元置全1.

開始AL=ADRX，BL=ADRYAL是正數(shù)？BL是正數(shù)？FLAG置全1結(jié)束YBL是正數(shù)？FLAG=1NYNNFLAG=0Y6.3已知兩個(gè)帶符號數(shù)X,Y分別存放在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為字?jǐn)?shù)據(jù),存放在ADR單元,若X中含有偶數(shù)個(gè)1,將FLAG單元置1,否則FLAG單元置0.

開始AX=ADRAL偶1？AH偶1？FLAG置0結(jié)束YBL偶1？FLAG置全1NYNNFLAG置全1Y6.3已知X為字?jǐn)?shù)據(jù),存放在ADR單元,若X中含有偶數(shù)個(gè)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下列程序有錯(cuò),找出.已知程序欲完成的功能是從兩個(gè)無符號數(shù)中選出較大者送入MAX單元,若兩者相同,將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下列程序有錯(cuò),找出.已知程序欲完成的功能是從兩個(gè)無符號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