Subject:   -11- Can I mix 1MB and 2MB SIMMS in my 4D/20 & 4D/25 Personal
                IRISes?
Date: 20 May 1993 00:00:01 CST

  From PIPELINE March/April 1992, page 18:
  You can use either 1MB or 2MB SIMMs in these systems.  If you mix 1MB
  and 2MB SIMMs, all sixteen memory slots must be filled.