Browse Prior Art Database

Method to Add MacIntosh Input/Output Connectors to the Existing Personal Computer System

IP.com Disclosure Number: IPCOM000118933D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Lam, SH: AUTHOR [+2]

Abstract

Disclosed is a method to add Macintosh* Input/Output (I/O) connectors to the existing Personal Computer (PC) system. A daughter card was designed to include connectors for Apple Desktop Bus (ADB) and GeoPorts.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Method to Add MacIntosh Input/Output Connectors to the Existing Personal
Computer System

      Disclosed is a method to add Macintosh* Input/Output (I/O)
connectors to the existing Personal Computer (PC) system.  A daughter
card was designed to include connectors for Apple Desktop Bus (ADB)
and GeoPorts.

      The PowerPC** Common Hardware Reference Platform (CHRP)
architecture allowed many OSs, particularly MacOS, NT, and AIX, to
run on the same system.  Initially, MacOS did not support PC I/Os and
NT & AIX** did not support MacIntosh I/Os.  So, both PC I/Os and
MacIntosh I/Os need to be incorporated into a PC box which only have
PC I/Os breakout in the back panel.

      To include the Mac I/Os, a daughter card was built which
contains two 9-pin DIN connectors for serial ports and a 4-pin DIN
connector for the ADB bus which the Mac Keyboard will be plugged-in.
The card also has filters for Serial ports and ADB bus.  A 2x13 Berg
connector on the card is used for connecting the serial ports and ADB
bus signals to the motherboard.

      This daughter card is mounted to the breakout of the ISA slot
of a LPX formfactor PC box.  Following is the drawing of the card:

                            (Image Omitted)

   *  Trademark of Apple Computer, Inc.
  **  Trademark of IBM Corp.