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Rev 1229 Rev 1424
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; Detect all BIOS hard drives.
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; Detect all BIOS hard drives.
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; diamond, 2008
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; diamond, 2008
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        xor     cx, cx
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        xor     cx, cx
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        mov     es, cx
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        mov     es, cx
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        inc     cx
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        mov     di, 0x9080
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        mov     di, 0x9080
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        mov     byte [es:di-1], cl
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        mov     byte [es:di], 80h
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        mov     byte [es:di-1], cl
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        inc     di
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        cmp     [preboot_biosdisk], 1
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        cmp     [preboot_biosdisk], 1
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        jnz     bdde
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        jnz     bdde
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        mov     dl, 80h
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        mov     dl, 81h
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bdds:
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bdds:
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        mov     ah, 15h
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        mov     ah, 15h
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        push    cx dx di
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        push    cx dx di
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        int     13h
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        int     13h