Cumana QFS Double Density Disk Filing System

The Cumana QFS Double Density Disk Filing System consists of 7 ICs, including the sideways ROM, and a disc controller daughter which fits into the BBC IC78 socket (Intel 8271). The Cumana QFS Double Density Disk Filing System uses a Fujitsu MB8877A floppy disk formatter/controller.

The Cumana QFS disc filing system is very similar to the Acorn DFS. The QFS command summary is identical to that of the Acorn DFS and so maintains software compatability. But the QFS includes a built-in FORMAT command which can format discs in single or double density. Single density is the same as the Acorn DFS, double density is 18 sectors of 256 bytes (=360K) instead of 10 sectors (=200K).

Here is the Cumana QFS Users Handbook and Fitting Instructions .


Manufacturer: Cumana
Date: Unknown

Magazines RELATED to Cumana QFS Double Density Disk Filing System in our Library

Item Manufacturer Date
Personal Computer World - August 1987 1 Aug 1987
Archive - Vol 1, No 1 - October 1987 Norwich Computer Services Oct 1987
Archive - Vol 1, No 2 - November 1987 Norwich Computer Services Nov 1987
Archive - Vol 1, No 3 - December 1987 Norwich Computer Services Dec 1987
Archive - Vol 1, No 4 - January 1988 Norwich Computer Services Jan 1988
Archive - Vol 1, No 5 - February 1988 Norwich Computer Services Jan 1988
Byte January 1988 Jan 1988
Personal Computer World - January 1988 1 Jan 1988
Archive - Vol 1, No 6 - March 1988 Norwich Computer Services Mar 1988
Archive - Vol 1, No 7 - April 1988 Norwich Computer Services Apr 1988
Archive - Vol 1, No 8 - May 1988 Norwich Computer Services May 1988
Archive - Vol 1, No 9 - June 1988 Norwich Computer Services Jun 1988
Archive - Vol 1, No 10 - July 1988 Norwich Computer Services Jul 1988
Archive - Vol 1, No 11 - August 1988 Norwich Computer Services Aug 1988
Archive - Vol 1, No 12 - September 1988 Norwich Computer Services Sep 1988
Personal Computer World - January 1989 1 Jan 1989
PC World Focus March 1989 Number 1 Mar 1989
Personal Computer World - March 1989 1 Mar 1989
Personal Computer World - April 1989 1 Apr 1989
Acorn - Higher Education News 2 - Summer 1989 Acorn Computers Limited May 1989
Personal Computer World - July 1989 Jul 1989
Personal Computer World - November 1989 1 Nov 1989
Personal Computer World - February 1990 1 Feb 1990

This exhibit has a reference ID of CH50786. Please quote this reference ID in any communication with the Centre for Computing History.

 

Cumana QFS Double Density Disk Filing System

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