Defence Force Wiki

Technical guides

Floppy Disk Controller WD1793	Technical Information on the WD1793 Microdisc Floppy Disk Controller
Floppy Disk Controller WD1773	Technical Information on the WD1773 Jasmin Floppy Disk Controller
Byte Drive 500	Technical Information on the Byte Drive 500 Floppy Disk Controller
Cumana Disc Interface	Technical Information on the Cumana Floppy Disk Controller

DSK Disk Format	Description of the file format used by emulators to store disk images
SEDORIC Disk Format	Information on the structure and format of SEDORIC (Microdisc) disks
RANDOS Disk Format	Information on the structure and format of RANDOS (Microdisc) disks
XL DOS Disk Format	Information on the structure and format of XL DOS (Microdisc) disks
FT-DOS Disk Format	Information on the structure and format of FT-DOS (Jasmin and Jasmin II) disks
BD-DOS Disk Format	Information on the structure and format of BD-DOS (Byte Drive 500) disks
CUMANA Disk Format	Information on the structure and format of Cumana DOS (Cumana drive) disks

Whilst the above two chapters provide information on RANDOS and JASMIN the following examples are limited to the Microdisc.

Loading a SEDORIC file	Example of Loading a Sedoric File from Machine Code
Saving a SEDORIC file	Example of Saving a Sedoric File from Machine Code
Fetching a SEDORIC Directory	Example of fetching a Sedoric Disk Directory from Machine Code

Low Level Loading from Disk	Example of Low Level reading from Disk
Low Level Saving to Disk	Example of Low Level writing to Disk

Example of Detecting FDC Presence and Type
Example of Detecting Number of Drives
Example of Detecting Drive Type
Example of Detecting Disk Presence
Example of Detecting Disk Format
Advanced FDC Examples
How to create a new Disc Format