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Bitfields for Cirrus Logic options word 1

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Bit Description

0, 1

reserved
2 - 4 monitor type
5 - 6 maximum vertical resolution
7 - 9 reserved
10 force 8-bit operation
11 - 13 reserved
14 vertical refresh frequency at 640x480
= 0 60 Hz
= 1 high refresh
15 reserved

See Also:

AH=12h/BL=AEh