[Oberon] http://www.oberon.ethz.ch/display.html

[Lisias Toledo]

peter_easthope at gulfnet.sd64.bc.ca wrote:

> What exactly is the purpose of this procedure?
> What is accomplished in each of the three
> statements?
>    curBank := bank;
>    SYSTEM.PORTOUT(3D8H, CHR(bank));
>    SYSTEM.PORTOUT(3D9H, CHR(bank))

To understand what this do one must understand the way VGA Cards works
and the IBM-PC RealMode addressing.

In ftp://x2ftp.oulu.fi/pub/msdos/programming/docs/ you will find a lot
of information about this (and even more).

In special, read :

pxdtut5.zip
vgadoc4b.zip

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