jmp.rar_jmp单字节

data segment table dw s1,s2,s3,s4,s5,s6,s7,s8 control db ? string1 db 'Please control:$' string2 db 0dh,0ah,'The result is:$' data ends stack segment db 100 dup(0) stack ends code segment assume cs:code,ds:data,ss:stack main proc far push ds xor ax,ax push ax mov ax,data mov ds,ax lea dx,string1 mov ah,09h int 21h mov ah,01h int 21h sub al,30h mov cl,4 ror al,cl lea di,control mov [di],al mov ah,01h int 21h sub al,30h or al,[di] mov [di],al lea bx,table gtbit: rcr al,1 jc getag add bx,2 jmp short gtbit getag: call [bx] ret main endp s1 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'a' int 21h ret s1 endp s2 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'b' int 21h ret s2 endp s3 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'c' int 21h ret s3 endp s4 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'d' int 21h ret s4 endp s5 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'e' int 21h ret s5 endp s6 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'f' int 21h ret s6 endp s7 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'g' int 21h ret s7 endp s8 proc lea dx,string2 mov ah,09h int 21h mov ah,2 mov dl,'h' int 21h ret s8 endp code ends end main