Fujitsu stylistic lt Reference Manual page 106

Option Parameter
Description
BIOS_VIDEO_CONTRAST
Video Display Contrast
Note: This option is supported only for
systems with a color transflective LCD
type.
(current only)
7-14 BIOS Configuration Application Programming Interfaces
Table 7-3 Discrete BIOS Settings
Setting Parameter Value
0 to 0x7F
Description
Pass a value within this
range to specify the
contrast for the current
setting. The greater the
value, the higher the
contrast setting. (Note
that the setting you
specify is not retained
after the system is shut
down.)