Browse Prior Art Database

Magnetic Tape Control Systems

IP.com Disclosure Number: IPCOM000097741D
Original Publication Date: 1961-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

O'Brien, HA: AUTHOR [+2]

Abstract

The tape control system includes a plurality of tape motion control and sensing units 3a and 3b, which are both used in conjunction with a single read section 1 and a single write section 2. Each motion control is associated with a bus A or B, each comprising a plurality of data lines and control lines which are connected in common to a plurality of tape transports TT.

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Magnetic Tape Control Systems

The tape control system includes a plurality of tape motion control and sensing units 3a and 3b, which are both used in conjunction with a single read section 1 and a single write section 2. Each motion control is associated with a bus A or B, each comprising a plurality of data lines and control lines which are connected in common to a plurality of tape transports TT.

The read section 1 and write section 2 simultaneously control reading and writing from two different tape transports connected respectively to busses A and
B.

The data read from and written by the two simultaneously operating transports is transmitted to and from memory by means of interface busses C and D which respectively comprise a plurality of data lines, control lines, interrupt lines, etc. These are conventionally provided as a computer channel.

Each motion control and sense unit 3a or 3b controls certain off line operations for the tape transports on their respective busses A or B, such as rewind, load, unload. Furthermore, each unit 3a or 3b controls and senses space forward and space backward movements to a specific point on the tape as signaled by the computer.

Once the computer signals any of these control or sense operations, the addressed motion control and sense unit can thereafter cause the selected tape transport to perform the signaled motion off line so that the busses are not afterwards tied up by the control and sense operations. Hence, the compute...