Path: utzoo!attcan!uunet!husc6!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!McMaster.CA!BEAME
From: BEAME@McMaster.CA
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: RE: ethernet card vs. hard disk
Message-ID: <8906071207.aa22452@louie.udel.edu>
Date: 7 Jun 89 16:06:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 24



> I am planning to run the IBM NETWATCH program (part of IBM's TCP/IP product)
> so I got one of the ONLY TWO ethernet cards it supports (UB's PC/NIC) and
> IBM's most powerful machine that still has an AT bus (PS/2-30/286).

> Here's the problem I run into.  When I boot from the hard disk (MS-DOS
> versions 3.3 and 4.0 have been tried) any attempt to access the ethernet
> card with any program will result in the machine locking up with the
> screen showing:

Well we had a similar problem with file transfer for a hard disk on a
PS/2 30/286, the program would lock up when access was attempted to the disk.

We found the problem! PS/2 Model 30/286 are NOT AT class machines, they
are XT class machines when you are dealing with the BIOS and hardware
interrupts. What this means, is that interrupt 5 (Alternate printer on an AT)
is used for the hard disk, just like an XT!!!!!!!

If you have set the interrupt to 5 on the UB card, change it, you are
conflicting with the XT's (model 30/286) hard disk.

        - Carl Beame
          Beame@McMaster.CA