SCO TCP/IP

[Bruce Wampler]

The problem described: After trying installing TCP/IP on a 25MHz
machine, the system hangs on reboot.

The answer: (as least for some machines) - you need a new boot
 program.  Apparently some machines will hang when the kernal
goes over 640K because some instruction doesn't complete in
the boot.  I don't remember the exact number of the fix, but
the SCO newsletter said this was available to all users, and it
is also listed on their dial-in download service. The new boot
solved this problem on my machine.