Browse Prior Art Database

Direct Punch for Buffered Key Entry Device

IP.com Disclosure Number: IPCOM000076826D
Original Publication Date: 1972-Apr-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Battistoni, RB: AUTHOR [+5]

Abstract

In the normal operation of the key entry device of the drawing, characters keyed from keyboard 2 are entered into buffer A where they are held until an entire 80 character record has been keyed. When column 80 has been entered into buffer A, a latch DATA TRANSFER is set by logic circuits that are not shown. DATA TRANSFER provides signals 3, 4 to control buffer A to transfer the record to buffer B and to enable punch 5 to begin punching a data card, according to the contents of buffer B.

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Direct Punch for Buffered Key Entry Device

In the normal operation of the key entry device of the drawing, characters keyed from keyboard 2 are entered into buffer A where they are held until an entire 80 character record has been keyed. When column 80 has been entered into buffer A, a latch DATA TRANSFER is set by logic circuits that are not shown. DATA TRANSFER provides signals 3, 4 to control buffer A to transfer the record to buffer B and to enable punch 5 to begin punching a data card, according to the contents of buffer B.

A latch CUSTOMER DIRECT PUNCH is set in response to a signal 6 when the operator closes a keyboard switch to select the direct punch operation. A latch FORCE ENTRY COMPLETE provides the signal to DATA TRANSFER to produce the direct punch operation. FORCE ENTRY COMPLETE is set on the coincidence of a signal 7 and the trailing edge (as provided by the capacitor) of a signal COUNT UP CONTROL, which is developed at the end of the operation of entering a character into buffer A. FORCE ENTRY COMPLETE is reset at the end of the buffer scanning cycle during which the character is transferred from buffer A to buffer B.

A latch INHIBIT DIRECT PUNCH provides signal 7 and thereby establishes whether the operation is to be buffered or direct. INHIBIT DIRECT PUNCH is reset, to permit direct punch, by a program bit that defines the beginning of a field. It is set, to inhibit direct punch, in response to the reset state of CUSTOMER DIRECT PUNCH, or a pro...