Browse Prior Art Database

Parallel Interface Printer Simulator

IP.com Disclosure Number: IPCOM000059969D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Nakada, Y: AUTHOR [+2]

Abstract

This parallel interface printer simulator provides a chance for a software engineer to develop a new software having a new control code system, by utilizing an existing printer. As shown in the figure, this simulator system is comprised of a pair of PAC (Parallel Interface Adaptor) cards and a Utility Program installed in an IBM 5550 system, etc. A newly developed control code or "A" spec. data is transmitted on a parallel interface to "a" printer simulator. This simulator system, especially the Utility Program converts "A" spec. data to an existing "B" spec. data on a parallel interface to an existing "B" printer. PAC card provides bidirectional signal lines for a unidirectional signal port on a conventional parallel interface.

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Parallel Interface Printer Simulator

This parallel interface printer simulator provides a chance for a software engineer to develop a new software having a new control code system, by utilizing an existing printer. As shown in the figure, this simulator system is comprised of a pair of PAC (Parallel Interface Adaptor) cards and a Utility Program installed in an IBM 5550 system, etc. A newly developed control code or "A" spec. data is transmitted on a parallel interface to "a" printer simulator. This simulator system, especially the Utility Program converts "A" spec. data to an existing "B" spec. data on a parallel interface to an existing "B" printer. PAC card provides bidirectional signal lines for a unidirectional signal port on a conventional parallel interface. Such a change of signal direction, signal polarity and pin assignment on a printer interface of Centronics standard is changed by the Utility Program, because each PAC card has programmable registers and gates. Each PAC card is operable either in a data input card mode or in a data output card mode. Such a mode selection is also programmable. Therefore, the Utility Program with the aid of a pair of PAC cards achieves the above data conversion for simulation purpose.

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