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AH = 12h BL = 84h
Return:
AX = user options word (see #00030)
See Also: AH=12h/BL=89h - AH=12h/BL=8Ah - AH=12h/BL=8Bh - See Also: AH=12h/BL=90h - AH=12h/BL=9Ah
Bitfields for Cirrus Logic user options word: Bit(s) Description (Table 00030) 1,0 centering. 00 vertical centered, 01 from bottom, 10 from top, 11 reserved 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 4 ??? 7-5 video mode (001 CGA, 010 MGA, 011 EGA, 100 VGA) 8 external monitor enabled instead of LCD panel 9 vertical expand mode enabled 10 8-bit mode instead of 16-bit mode 11 normal video rather than reverse video (for LCD) 12 attribute automap rather than attribute emulation 13 bold mode disabled (default) 14 fast bandwidth 15 ???
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