Browse Prior Art Database

Direct Attachment of Macintosh Computers and Printers to AS/400 System

IP.com Disclosure Number: IPCOM000116581D
Original Publication Date: 1995-Oct-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Allen, GD: AUTHOR [+13]

Abstract

Disclosed is a means of directly attaching Macintosh* computers to an AS/400** computer. The Macintosh computers are recognized as workstations on the AS/400. Only workstation functions are supported, file transfer is not supported. The Macintosh computers can be attached to the AS/400 by 3 different electrical interfaces; Ethernet*** Local Area Network (LAN), Token Ring Local Area Network and LocalTalk*. When a Macintosh computer is attached by LocalTalk, it can serve as the AS/400 console.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 62% of the total text.

Direct Attachment of Macintosh Computers and Printers to AS/400 System

      Disclosed is a means of directly attaching Macintosh* computers
to an AS/400** computer.  The Macintosh computers are recognized as
workstations on the AS/400.  Only workstation functions are
supported, file transfer is not supported.  The Macintosh computers
can be attached to the AS/400 by 3 different electrical interfaces;
Ethernet*** Local Area Network (LAN), Token Ring Local Area Network
and LocalTalk*.  When a Macintosh computer is attached by LocalTalk,
it can serve as the AS/400 console.

      In order for a Macintosh computer to be directly attached to an
AS/400 computer, a common communication protocol had to be
established.  The APPLETALK* protocol was selected.  The APPLETALK
protocol stac was ported from the Macintosh and then modified to run
in the AS/400 Multifunction I/O Processors (MFIOP) and I/O Processors
(IOP).  Existing microcode in the MFIOPs and IOPs was also modified
to support the APPLETALK protocol stack running in the MFIOPs and
IOPs (see the Figure).

      AS/400 system code which recognizes and configures various
types of workstations was updated to support the Macintosh computers.
Functionally, the Macintosh computers to the AS/400 operating system
system as locally attached dependent Twinax workstations.  When the
AS/400 operating system is required to communicate with the Macintosh
computers, it builds a 5250** Twinax command data stream and pas...