[ ...Continued From Previous Message ]
                push    es
                push    ds
                xor     bx, bx
                mov     ds, bx
                dec     bx
                mov     es, bx
                mov     eax, [0]
                mov     edx, eax
                xor     edx, ebx
             es mov     [0x010], edx
                cmp     [0], eax
                jne     short .a20_low
             es cmp     [0x010], edx
                jne     short .a20_low
                pop     ds
                pop     es
                mov     si, data.msgYa20
                call    .outs
                jmp     short .a20_ok
.a20_low:       pop     ds
                pop     es
                mov     si, data.msgNa20
                call    .outs
                mov     si, data.msg2a20
                call    .a20_msg
                cli
                call    .a20_p1
                mov     al, 0xad
                out     0x64, al
                call    .a20_p1
                mov     al, 0x0d0
                out     0x64,al
                call    .a20_p0
                in      al, 0x60
                push    ax
                call    .a20_p1
                mov     al, 0x0d1
                out     0x64, al
                call    .a20_p1
                pop     ax
                or      al, 2
                out     60h, al
                call    .a20_p1
                mov     al, 0aeh
                out     64h, al
                call    .a20_p1
                sti
                push    es
                push    ds
                xor     bx, bx
                mov     ds, bx
                dec     bx
                mov     es, bx
                mov     eax, [0]
                mov     edx, eax
                xor     edx, ebx
             es mov     [0x010], edx
                cmp     [0], eax
                jne     short .a20_err
             es cmp     [0x010], edx
                jne     short .a20_err
                pop     ds
                pop     es
.a20_ok:        popad
                jmp     .a20_done
.a20_err:       pop     ds
                pop     es
                mov     si, data.msg3a20
                call    .outs
                jmp     .bootout
.bootout:       mov     ah, 0x09
                mov     dx, cs
                mov     ds, dx
                mov     dx, data.msgarghh
                int     0x21
                mov     ah, 0x4c
* [ Continued In Next Message... ]
 -- SPEED 2.00 [NR]: -- Lord Nihil -- This is a microsoft-free zone.
--- BBBS/NT v3.33 How
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