Browse Prior Art Database

Storage Ripple

IP.com Disclosure Number: IPCOM000094437D
Original Publication Date: 1965-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 3 page(s) / 42K

Publishing Venue

IBM

Related People

Allen, EL: AUTHOR [+2]

Abstract

In a data processing system, it is desirable to provide manual controls for storing predetermined data in all locations of storage or for sequentially parity checking and/or displaying the contents of each storage location. A read-only store (ROS) can be utilized to control data processing systems. ROS contains a sequence of microinstructions in various sequences. These are normally accessed by computer program instructions to control operations within the central processing unit. ROS contains a plurality of addressable words.

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Storage Ripple

In a data processing system, it is desirable to provide manual controls for storing predetermined data in all locations of storage or for sequentially parity checking and/or displaying the contents of each storage location. A read-only store (ROS) can be utilized to control data processing systems. ROS contains a sequence of microinstructions in various sequences. These are normally accessed by computer program instructions to control operations within the central processing unit. ROS contains a plurality of addressable words.

Each word contains a plurality of binary bits which directly control gates within the central processing unit. Certain binary bits in the ROS word designate an address in ROS for the next microinstruction in sequence. If ROS is preset with the necessary sequences for storing data in storage or displaying data from storage, controls on an operator console can be provided for designating the starting address in the ROS sequence. If various types of stores are provided in the data processing system, each requiring a distinct type of control, several sequences of ROS microinstruction words can be provided, each sequence being accessible from the operator' s console.

The drawing depicts the procedure for storing or displaying data under control of various switches and pushbuttons which can be provided on a console. The operation proceeds as follows after the system is stopped or reset:

1. If there are various types of storage devices in the data processing system, a selector switch indicates the store to be utilized.

2. Address keys on the console are set to designate the binary address of the first ROS word address for the microinstruction sequence and to determine whether to display the contents of store or store predetermined data in all locations of the store. The complete sequence, after the first ROS word, depends on the type of store selected and whether data is to be stored or displayed.

3. The rate switch, normally found on most consoles, indicates whether the processing initiated is to proceed through the execution of a designated instruction and continue until some further designation to halt is given, i. e., Process....