Colin P. The Advanced Disk User Guide For The BBC Micro 1985

Textbook in PDF format

Of all the peripheral devices that you can attach to a BBC Microcomputer, probably none enhances its use and scope more than the disk drive. With fast access to both programs and data alike, you can at last put the microcomputer to work - or at least that is how it should be.
This book gives you the low-down on the BBC Microcomputer Disk System and how to use it. It is an extremely useful reference guide covering both software and hardware in-depth. The topics covered include:
Disks and Drives.
The Intel 8271 Floppy Disk Controller.
Acorn DFS.
All the DFS low-level calls including OSWORD.
Error Messages.
Problems.
Disk Overlay.
Disk Recovery.
Access Methods.
Database.
Sorting