source: bootcd/isolinux/syslinux-6.03/com32/modules/stubs/swapstub.asm @ e16e8f2

        bits 16
swap:
        push bx
        movzx bx,dl
        mov dl,[cs:bx+(table-$$)]
        pop bx
.jmp:   jmp 0:0
        nop
        nop
install:
        ;; DS = CS, ES = 0
        mov edi,[es:si+4*0x13]
        mov [swap.jmp+1],edi
        mov di,[es:0x413]
        dec di
        mov [es:0x413],di
        shl edi,16+6
        mov [es:si+4*0x13],edi
        shr edi,16
        mov es,di
        xor di,di
        rep movsd
        mov si,0
        mov di,0
        mov ds,si
        mov es,di
        mov ecx,0
        mov esi,0
        mov edi,0
        jmp 0:0

        align 16
table: