bochs启动时boot无法启动，卡在booting form floppy...

boot的代码如下(书上网上借鉴)

    org 0x7c00
BaseOfStack equ 0x7c00
StartBootMessage: db "start boot"
label_start:
    mov ax,cs
    mov ds,ax
    mov es,ax
    mov ss,ax
    mov sp,BaseOfStack

;====== clear screen
    mov ax,0600h
    mov bx,0700h
    mov cx,0
    mov dx,0184fh
    int 10h

;====== set focus
    mov ax,0200h
    mov bx,0000h
    mov dx,0000h
    int 10h

;====== display in screen:start booting
    mov ax,1301h
    mov bx,000fh
    mov dx,0000h
    mov cx,10
    push ax
    mov ax,ds
    mov es,ax
    pop ax
    mov bp,StartBootMessage
    int 10h

;====== reset flopy
    xor ah,ah
    xor dl,dl
    int 13h

    jmp $

;====== fill zero until whole sector
    times 510 - ($ - $$) db 0
    dw 0xaa55

bochs的配置文件也是网上借鉴.boot: floppy
但在运行时就卡在booting form floppy...

在bochs看走到0x7dfe后没有停下来，这个正常吗？

https://blog.csdn.net/xwpcom/article/details/1545957