Subject:      Old IBM PC Machines Won't Run on 2.1 Network
Date:         May 25, 1988
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GENERAL
INFORMATION:  We had a user report a problem with very old IBM PCs and
              Netware v2.1.  The machines were running fine under v2.0a. 
              The machines having problems are the model 5150 PCs; 5160 PCs
              work fine, since they have a later BIOS revision.  The user
              verified with IBM that model 5150 PCs, which have a BIOS chip
              with the last 4 digits being 1475, will have problems running
              on a network.  If the machine is younger than 1982, or the
              user can verify that the BIOS chip is 1575 or later, there
              should be no problem.  A machine with the older ROM BIOS
              (1475 on the chip) will hang when trying to execute NET3.