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Control Circuit Bypassing some Flexible Diskette Controller Functions

IP.com Disclosure Number: IPCOM000051714D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-10

Publishing Venue

IBM

Related People

Authors:
Ott, WB Tutt, WE [+details]

Abstract

This article describes logic for utilizing desired functions of commercially available flexible diskette controllers and bypassing other functions provided by such controllers which are either incompatible with or less desirable to use with a flexible diskette drive. Commercially available flexible diskette controllers interface with diskette drives through an input/output port of the main processor. However, with some diskette drives it is necessary to provide auxiliary control of the controller without disturbing the interface, that being its ability to execute the read/write commands. The additional functions performed by the commercially available flexible diskette controller controls the auxiliary functions of the diskette drive, such as the seek and head load functions.