Browse Prior Art Database

Print Authorization Matrix

IP.com Disclosure Number: IPCOM000089528D
Original Publication Date: 1977-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 34K

Publishing Venue

IBM

Related People

DeBry, RK: AUTHOR [+2]

Abstract

In keyboard display terminal systems it is quite common to have facilities whereby the data displayed by a display terminal can be transferred to an associated printer to produce hard copy of the displayed data. The system described below provides a matrix of values which is sent from an associated host processor to the controller of the display system, and then is operative in the controller to recognize print requests from individual displays. According to that matrix, individual displays can have access to individual or classes of printers, giving versatility to the system.

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Print Authorization Matrix

In keyboard display terminal systems it is quite common to have facilities whereby the data displayed by a display terminal can be transferred to an associated printer to produce hard copy of the displayed data. The system described below provides a matrix of values which is sent from an associated host processor to the controller of the display system, and then is operative in the controller to recognize print requests from individual displays. According to that matrix, individual displays can have access to individual or classes of printers, giving versatility to the system.

The figure shows an information handling system of a kind which can utilize this feature. A number of keyboard displays 10 and printers 14 are connected by respective transmission lines 16 and an adapter 18 to the I/O bus 20 of a controller 22 having storage facilities 24 for the above-described matrix. Controller 22 is also connected to a host data processing system 26 which can load the matrix into storage 24.

In this system, adapter 18 has a number of ports labelled 0 through N, each accommodating a single keyboard display 10 or a single printer 14. Table I shows a typical port assignment wherein the ports are labelled 0 through 8 and their utilization is indicated by a "D" for a display or a "P" for a printer.

TABLE I Port # 0 1 2 3 4 5 6 7 8

Port Utilization Device

Type D P P D D P P P D. It will be seen from

Table I that printers are assigned to ports 1, 2, 5, 6 and 7.

Table II shows a typical matrix organization for this port assignment.

TABLE II Address &

Printer Displays

PRINTER Address Status Class Authorized AUTHORIZATION
MATRIX - 1 Local 71 0, 3

2 Local 71 0, 3

5 Local 72 0, 3

6 Shared 73 0, 3, 4, 8

7 System --.

According to the matrix, the printers at ports 1, 2 and 5 are assigned for local use (i.e., by a display of the system), the printer at port 6 is "shared" (i.e., can be used by a display or by the host), and the printer at port 7 is reserved for use by the system, (i.e., by host 26).

As indicated further by the matrix, the printers at position 1 and 2 are of class 71, while those at positions 5 and 6 are of class 72 and 7...