微机原理,键盘输入实现任意两个数相加.doc

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1、用汇编语言，从键盘输入任意两个十进制数，实现两个数相加DATASSEGMENTXDB100DUP(0)YDB100DUP(0)ZDB100DUP(?),'$'DATASENDSCODESSEGMENTASSUMECS:CODES,DS:DATASSTART:MOVAX,DATASMOVDS,AXMOVBX,0X1:MOVAH,01HINT21HCMPAL,'+'JZX2PUSHAXINCBXJMPX1X2:MOVCX,BXMOVSI,99X3:POPAXMOVX[SI],ALDECSILOOPX3MOVBX,0X4:MOVAH,01HINT21HCMPAL,'='JZX5P

2、USHAXINCBXJMPX4X5:MOVCX,BXMOVSI,99X6:POPAXMOVY[SI],ALDECSILOOPX6CLCPUSHFMOVCX,100MOVSI,99MOVDI,99X7:MOVAL,X[SI]MOVDL,Y[SI]POPFADCAL,DLAAAPUSHFADDAL,30HMOVZ[DI],ALDECSIDECDILOOPX7MOVSI,0X8:CMPZ[SI],30HJNZX9INCSIJMPX8X9:LEADX,Z[SI]MOVAH,09HINT21HMOVAH,4CHINT21HCODESENDSENDSTART