[ I'm dropping tech-install from the cc list. I don't think this should be
on both lists. ]

| It's a stock 2-floppy 1.5 install.
| 
| I'm not sure I follow you on running "tr"; i assume you're not talking 
| about the character translation command?  Is "tr" some kind of 
| debugger trace?

"trace" is a DDB (debugger) command that you can enter at the "db>" prompt.
It can be abbreviated to "tr", or more commonly just "t".

It prints the stack trace, which tells us how we got to the trap.

--jhawk