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Browse Prior Art Database

Multiple Device Addressing with a Single Host Address

IP.com Disclosure Number: IPCOM000122336D
Original Publication Date: 1991-Nov-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 60K

Publishing Venue

IBM

Related People

Cox, NE: AUTHOR [+4]

Abstract

Typically, a host application sends data to a printer via a host directed print to a printer with a unique host LU address or a Host Initiated Local Copy of the screen buffer to an assigned printer port after the data has been written to the display. The latter of the two methods does not require a host network LU address for the printer, but does require an address for the display.

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

Multiple Device Addressing with a Single Host Address

      Typically, a host application sends data to a printer via a
host directed print to a printer with a unique host LU address or a
Host Initiated Local Copy of the screen buffer to an assigned printer
port after the data has been written to the display.  The latter of
the two methods does not require a host network LU address for the
printer, but does require an address for the display.

      Multiple device addressing with a single host address allows a
user with limited host addresses to share one host address between a
display and a printer.  The host can send data so that data intended
for the display will appear only on the display, and data intended
for the printer will appear only on the printer.

      For this to work, an association must exist between a PRINTER
device and a DISPLAY device.  In addition, there is a data stream
requirement for a means to indicate to the subsystem that this data
stream is not to be directed to the addressed LU, but to the
associated PRINTER for the DISPLAY. This is implemented by using the
Start Print bit in the Write Control Character (WCC).  The use of the
Start Print bit eliminates the Host Initiated Local Copy function
described above, but requires no host application changes. If both
Multiple Device Addressing with a Single Host and Host Initiated
Local Copy are needed, this concept could be extended to use bits 2,
3 of the WCC in conjunction with the Star...