🚀 go-pugleaf

I have recently aquired a 386 machine with a vga board.  The manual says
it is a "EXPERT TopVGA 3000 SERIES VGA Adapter" and the manual is dated
october 24, 1988.  Very bright red in color and seems to be typeset with
ventura.  Anyway ... the machine boots up with the following message:
TVGA BIOS C3-128 Ver1.03
256K VGA MODE

Note that the text "256" and "VGA" are displayed in yellow, not white.
The manual describes how to set the switch settings to use either an analog
or digital monitor.  This requires moving one switch.  The beast has six
switches, of which, the manual does not describe their use.  It fully
supports CGA/EGA/MONO/HERC/VGA/extended row/column definitions, but only
described by the software.  I want to know what the other switch settings are
for.  It should be for changing the board to be in a different configuration,
at least one would think so.  The distributor has no information on it.  Not
that they're telling me anyway. 
Anyone else using a board like this and know what these switches do?
(BTW:  I have only 256K, one bank, of memory installed on the board, and
it does take another 256K, that's what the previuos text describes on bootup.

Any help is appreciated.
Dan Keizer
calgary!wsscal!dan
or 
calgary!xenlink!blender!dan