Browse Prior Art Database

Instruction Interpreted Channel Commands

IP.com Disclosure Number: IPCOM000093693D
Original Publication Date: 1966-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Toner, JW: AUTHOR

Abstract

In connecting time-dependent, input-output devices I/O to a processor in which the I/O device having a document set in motion is controlled to perform a selected function, i.e., read a document, there can be a disparity between the time the document takes to pass from the reading station to a selecting terminal, i.e., pocket selector, and a processor command. Such command selects the pocket based on the reading. In instances where there is a plurality of I/O devices being multiplexed, priorities between I/O can interfere with the pocket selection program. Such interference can be sufficient to prevent such selection being made before the document moves past a physical point where this is possible.

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Instruction Interpreted Channel Commands

In connecting time-dependent, input-output devices I/O to a processor in which the I/O device having a document set in motion is controlled to perform a selected function, i.e., read a document, there can be a disparity between the time the document takes to pass from the reading station to a selecting terminal,
i.e., pocket selector, and a processor command. Such command selects the pocket based on the reading. In instances where there is a plurality of I/O devices being multiplexed, priorities between I/O can interfere with the pocket selection program. Such interference can be sufficient to prevent such selection being made before the document moves past a physical point where this is possible.

In processors utilizing I/O control words accessible to the I/O in which the same can include indicia of storage location, length of field, flags, etc., it is possible to provide controls. The latter are responsive to a set of I/O control words. The words are selected by data from the I/O to interpret the same as machine commands which allow processing of data from an I/O device without interruption from other I/O devices.

Thus, the time-dependent I/O has, in effect, priority over all other I/O devices preventing interference with determinations such as pocket selection.

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