汇编：编写程序段实现：5678h-1234h差存入双精度变量单元SUMW中
5678:1234H = 5678H*16+1234H = 56780H+1234H =5 6 7 8 0
1 2 3 4
\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014
5 7 9 B 4
56780H+1234H = 579B4H
PS\uff1a\u82e5\u6709\u4e0d\u660e\u767d\u7684\u5730\u65b9\uff0c\u53ef\u4ee5\u8ffd\u95ee
yuyrdu
SUMW EQU 50HORG 0000H
LJMP MAIN
ORG 0100H
MAIN: MOV A,#78H
CLR C
SUBB A,#34H
MOV SUMW,A
MOV A,#56H
SUBB A,#12H
MOV SUMW+1,A
LL: SJMP LL
说明：双精度变量SUMW单元中的数据低字节在前，高位字节在后。
绛旓細SUMW EQU 50H ORG 0000H LJMP MAIN ORG 0100H MAIN: MOV A,#78H CLR C SUBB A,#34H MOV SUMW,A MOV A,#56H SUBB A,#12H MOV SUMW+1,A LL: SJMP LL 璇存槑锛氬弻绮惧害鍙橀噺SUMW鍗曞厓涓殑鏁版嵁浣庡瓧鑺傚湪鍓嶏紝楂樹綅瀛楄妭鍦ㄥ悗銆
绛旓細DATEQU 30H DCNTEQU 34H TIMESEQU 35H ORG 0000H LJMP MAIN ORG 000BH LJMP T0ISR ORG 0030H MAIN:MOV SP,#5FH MOV TMOD,#01H MOV TH0,#HIGH(65536-5000)MOV TL0,#LOW(65536-5000)MOV P2,#00H MOV DCNT,#0 MOV 30H,#1 MOV 31H,#2 MOV 32H,#3 MOV 33H,#4 MOV TIMES,#0 ...
绛旓細璁綛X=1234H锛孉X=5678H锛屽疄鐜帮細BX-AX寰幆鍙崇Щ4浣嶄簩杩涘埗浣嶃侻OV AX,5678H MOV BX,1234H MOV CX,4 LOP2: ROR BX,1 ROL BX,1 RCR AX,1 RCR BX,1 CLC LOOP LOP2
绛旓細dseg segment X dw 1234H Y dw 5678H sum dw 0dseg endsassume cs:cseg, ds:dsegcseg segmentstart: mov ax, dseg mov ds, ax mov al, byte ptr x add al, byte ptr y daa mov byte ptr sum, al mov al, byte ptr x[1] adc al, 0 daa add...
绛旓細鍏堝姞搴曚簩浣34鍜78鐢╝dd鍦ㄥ姞楂樹袱浣嶇敤addc m51澶ф鐨勫啓娉 绠楁硶閮芥槸瀵圭殑 璁板緱閲囩撼鍟 MOV A #34H ADD A #78H MOV R1 A MOV A #12H ADDC A #56H MOV R2 A
绛旓細(AX)=0FFFFH (BX)=5678H (CX)=0FFFFH (SP)=1002H
绛旓細dw 5678 dw 1234 鍏朵腑0eah鏄疄妯″紡涓嬬殑闀胯烦杞満鍣ㄧ爜锛5678鏄亸绉伙紝1234鏄鍦板潃銆傚疄妯″紡涓嬮暱璺宠浆鎸囦护鐨勬牸寮忥細---byte1---byte2--byte3---byte4--byte5-- ---0EAh---|---offset---|---segment---| 杩欎釜瀹忔槸鎶婂叾浠ユ満鍣ㄧ爜鐨勫舰寮忓啓鍏ヤ唬鐮佹锛屽湪鏈変簺姹囩紪鍣ㄤ笉鎻愪緵瀵瑰簲鐨勬寚浠ゆ牸寮忚宑pu鍙堟敮...
绛旓細START: MOV SP,#60H ;鍫嗘爤,鏈绋嬪簭涔熷彲涓嶈 MOV 30H,#56H ;姹5678H+1234H MOV 31H,#78H MOV 32H,#12H MOV 33H,#34H MOV A,31H ADD A,33H MOV R2,A ;浣8浣嶅湪R2 MOV A,30H ADDC A,32H MOV R1,A ;楂8浣嶅湪R1 MOV R3,#10H ;30H鑷40H鍏10H涓瓧鑺 MOV R0...
绛旓細绛旀鏄疉 5678 DAT2-DAT1鐨勫兼槸5锛孌AT1鍜孌AT2鏄釜鍦板潃,鍋囪鏁版嵁娈典粠0寮濮嬶紝DAT1浠0寮濮嬶紝鍗犳嵁5BYTE锛1锛2锛3锛4锛孒),DAT2浠5寮濮嬶紝鍗犳嵁2BYTE锛岋紙78,56)鎵浠AT2-DAT1=5 MOV AX,ADDR灏辨槸灏嗙5涓唴瀛樺崟鍏冨紑濮嬬殑2BYTE閫佸叆AX,鎵浠ュ氨鏄疉鍟 娉細EMU8086浠跨湡缁撴灉浣岮锛岀粨鏋滃彲鑳藉拰浣跨敤鐨勭紪璇戝櫒...
绛旓細绋嬪簭濡備笅 mov bx,5678H mov cx,0abcdH mov dx,00ffH mov ax,1234H
