Hi.
>
> On 13 Apr 98 at 18:40, Frank B Smith wrote:
>
> > I am having a problem installing an S3 Virge DX card.  The mobo is TXPRO
> > w/Cyrix PR200 mx,  megs ram.  The video adapter is recognized by Win95, as
> > plug  n play and the driver disk is accessed.  Drivers are installed.
> > However the system reports a conflict.  Windows stays in generic VGA mode.
> >
> > I have removed the adapter from the device manager, removed the card and
> > moved it to a new PCI slot (three times) and re-installed.
> >
> > Does anyone know of any problem that I may be overlooking, other than bad
> > hardware?
>
>   Is there any chance you have a COM4 port in this machine?  Many S3
> chips include emulation of the IBM 8514/A adapter, and this conflicts
> with the "industry standard" COM4 address range.  [IBM had chosen,
> but not publicized, a different set of addresses for COM3-COM8 at the
> time they designed the 8514/A.]
>
> David G
>

        I'm imagining a method to get rid of this inconvenience, which I
myself have to test: map COM4/IRQ3 into one of the on mobo com ports, and
your modem or whatever to COM2/IRQ5. Then probably the port addresses are
not aliased.
        To check:
        -With DEBUG test aliasing on COM4 on modem or card:
                -i2EA. You will probably read 1.
                -i6EA. You will probably read also 1, which shows aliasing.
        -Now do the change above, and repeat:
                -i2EA. You will probably read 1.
                -i6EA. If you get a different reading, aliasing is gone.

        I'll appreciate any feedback.

************************************
Javier Vizcaino. Ability Electronics. [log in to unmask]
  Starting point:        (-1)^(-1) = -1
  Applying logarithms: (-1)*ln(-1) = ln(-1)
  Since ln(-1) <> 0, dividing:  -1 = 1     (ln(-1) is complex, but exists)