Abstract of INFO-MAC archived encoded Mac binary file
   'dev/card/get-depth-11-xfcn.hqx'
  Uploaded 02/11/1996   5335 bytes

From: sudderth@traveller.com (John Sudderth)
Subject: GetDepth XFCN 1.1

An XFCN which will return the current or maximum depth of the main monitor.
Version 1.1 - Fixed maximum depth function for PowerMacs.