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Date: | Wed, 15 Apr 1998 09:13:31 +0000 |
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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)
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