INT 10 - Cirrus Logic BIOS v3.02 - INQUIRE OPTIONS
        AH = 12h
        BL = 84h
Return: AX = user options word (see below)
SeeAlso: AH=12h/BL=89h,AH=12h/BL=8Ah,AH=12h/BL=8Bh,AH=12h/BL=8Ch,AH=12h/BL=8Fh
SeeAlso: AH=12h/BL=90h,AH=12h/BL=9Ah

Bitfields for user options word:
 bits 1,0       centering
                00 vertical centered, 01 from bottom, 10 from top, 11 reserved
 bits 3,2       720-dot fix-up options
                00 OR every 8th and 9th pixel
                01 display MGA mode from left
                10 display MGA mode from right
                11 skip every 9th pixel
 bit 4          ???
 bits 7-5       video mode
                001 CGA
                010 MGA
                011 EGA
                100 VGA
 bit 8          external monitor enabled instead of LCD panel
 bit 9          vertical expand mode enabled
 bit 10         8-bit mode instead of 16-bit mode
 bit 11         normal video rather than reverse video (for LCD)
 bit 12         attribute automap rather than attribute emulation
 bit 13         bold mode disabled (default)
 bit 14         fast bandwidth
 bit 15         ???

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