You may use any other BGI driver found on public sites or provided by your graphic hardware vendor (such as the SVGA.BGI driver for SUPER-VGA designed for Borland C 3.0 to improve the resolution and color capabilities.
You may also use the two drivers one of us (lb) has written,
that are distributed with PCSCHEME: SPY.BGI and PS.BGI.
The former is a debugging aid that prints
to the screen all the driver requests. The latter creates a PostScript
document that can then be incorporated in a text processor or sent to
a printer. See section for more information.