标签:数据 load org sharp bsp end png jmp 字节
多字节数据求和,求无符号数Ai的累加和。Ai为单字节数,并按i(i=1,2,3,...,,n)顺序存放在RAM从60H开始的单元中,
n放在R2中,求他们的和(双字节)高位放在R3,低位放在R4中。
算法思想:
向让低四位相加求和(ADD),如果有进位(CY=1),则对高四位用ADDC,并将结果放入R3
源代码:
ORG 0000H
LJMP ADD2
ORG 0100H
ADD2:
MOV R2,#8H
MOV R0,#60H
MOV A,#0H
MOV R4,#0DFH
MOV R5,#09H
TT:
ADD A,R5
MOV @R0,A
INC R0
INC R5
MOV A,R4
DJNZ R2,TT
ADD1:
CLR A
MOV R3,#00H
MOV R4,#00H
MOV R2,#8H
MOV R0,#60H
MAIN:
MOV A,R4
ADD A,@R0
MOV R4,A
CLR A
ADDC A,R3
MOV R3,A
INC R0
CLR C
DJNZ R2,MAIN
SJMP $
END
调试结果:
ORG 0000HLJMP ADD2ORG 0100HADD2:MOV R2,#8HMOV R0,#60HMOV A,#0HMOV R4,#0DFHMOV R5,#09HTT:ADD A,R5MOV @R0,AINC R0INC R5MOV A,R4DJNZ R2,TTADD1:CLR AMOV R3,#00HMOV R4,#00HMOV R2,#8HMOV R0,#60HMAIN:MOV A,R4ADD A,@R0MOV R4,ACLR AADDC A,R3MOV R3,AINC R0CLR CDJNZ R2,MAINSJMP $END
标签:数据 load org sharp bsp end png jmp 字节
原文地址:https://www.cnblogs.com/nanfengnan/p/14958007.html