It appears that my problem was too much memory in the IPC. Fortunately,

there is a workaround:

> From:tgsmith@East.Sun.COM (Timothy G. Smith - Technical Consultant Sun Baltimore)

> Message-Id: <9102131317.AA11134@fedps.East.Sun.COM>

> To: Jim Mattson <jmattson@ucsd.edu>

> Subject: Re: Problems booting IPC from 4.1.1 CD-ROM

> Do you you have a lot of memory?

> If so there is a known bug and a work around.

> The bug is with the low level startup code. It gets a little sick due

> to the size of some dynamically allocated tables (like the memory

> managment tables) not fitting in the memory contained in the first

> bank of memory. The startup code wants to run in the first bank. If

> you have a lot of memory and the first bank has 1MB simms in it then

> the solution is to put 4M simms in the first bank. Or in other words,

> install memory such that the highest capacity SIMMs are found in the

> lowest physical memory locations.

> Try looking at what memory is where and swapping in the high capacity

> simms for the first bank.

> --tim

Thanks also to Ned Danieley (ndd@sunbar.mc.duke.edu), who described the same

problem and fix.

--jim