HADFS was written and is under continuing revision by:
Jonathan Harston 70 Camm Street Walkley Sheffield S6 3TR EMail: email@example.com
and remains wholly copyrighted, (C)1990-2012. The program can be freely distibuted, as long as the code is not modified, and all copyright and authorship messages remain, and no charge is charged, other than legitimate disk purchase and copying costs. Ownership can be registered by writing to the above address, enclosing `5. This entitles you to a full printed reference manual and to immediate code updates. You are under no obligation to register, and you can probably manage with the manual contained these files.
Press means press, ie put your finger on the key, push down, and then release, as in: Press "X".
Type means a succession of presses, ie pressing each individual key, as in: Type "fred". It does not mean press Return at the end.
Enter means type, and then press the Return key, ie enter in something, as in: Enter the filename.
Return refers to the key labelled
RETURN (or sometimes
Shift refers to the key labelled
Ctrl refers to the key labelled
CTRL, and is called the control key.
Delete refers to the key labelled
Break refers to the Break key.
Shift-Break means press the Break key while holding down the Shift key. The Shift key on its own does not do anything, so don't be afraid to hold it down longer than necessary. In fact, this is to be recommended.
Ctrl-Break means press the Break key while holding down the Ctrl key, similar to above.
K is a unit of storage size, being 1024 bytes.
M is a unit of storage size, being 1024K, being 1,048,576 bytes.
G is a unit of storage size, being 1024M, being 1,048,576K, being
Ordinary text appears like this.
Text that appears on the screen, including error messages, *commands you type in and filenames appears in bold, like this:
Program names, specifying one of the HADFS programs appears in italics, like this: HUtils.
Subsection headings are underlines like this: Subject
Unless otherwise stated, the manual will assume that the ROM image is in
the machine, either in sideways RAM, or in an EPROM. If a second processor
is attached when loading in the ROM image, then the message
Press Break to is given, and the Break key should be pressed to reset the
second processor. An HADFS data disk does not have the ROM image on,
thereby releasing 16K of space for extra files. In all other respects,
HADFS data and system disks are identical. Once HADFS is in your machine,
it can be selected by
*HADFS or by H-Break.
Electron, ACP DFS BBC, DFS 0.90 BBC, DFS 1.20 BBC, Watford DFS 1.43, 1.44 BBC B+, DFS 2.10 BBC B/B+, Opus DDOS 4 with keyboard link 2 set Master, DFS 2.24, 2.26, 2.29 Master Compact, DFS 2.24
also with: Aries-B32 sideways RAM Integra-B shadow RAM Watford 32K shadow RAM Watford ROM/RAM board Solidisk sideways RAM Solidisk DFS (limited testing) 6502 second processor (BBC and Master) Z80 second processor (BBC and Master) 32016 second processor (BBC and Master) ARM second processor (BBC and Master)
Shadow screens are recognised on: Master computers Aries-B32 Integra-B shadow RAM Watford 32K RAM card
HADFS needs the OSWORD call &7F provided by Acorn DFSs to read and write to disks. Some testing on the Electron has not been as full as on other machines. You are welcome to copy HADFS and give it to your friends, etc., as long as none of the code or files are changed.
HADFS is available in the following formats: ISBN 1-899366-00-8 Manual, 400K 5¨" disk, 400K 3ę" disk and EPROM `5.00
On special request, the startup disk can be supplied on 5¨" disks as: 2*5¨" 1*80trk 200K disks AB and CD `5.00 2*5¨" 2*40trk 200K disks AB and CD `5.00 4*5¨" 1*40trk 100K disks A, B, C and D `5.00 The software is split over the disks as: A: Utils and small Library B: Library, Extras C: Manual Chapters 1 to 5 and small Library D: Manual Chapters 6 to 10 and small Library