Date   : Mon, 12 Oct 1998 21:01:45 +0200
From   : "Mark Usher" <marku@...>
Subject: Re: 6502 2nd Processor

Hi

>I think you will need the DDFS 1.54T to get the Tube code - this should be
>on The BBC Lives! as I am pretty sure it was in a load of ROM images I sent
>Mark Usher to catalogue and put up on the site.
Indeed you did, and it is at the BBC Lives. There is also a DDFS.txt file in
the watford\fs directory.

This is what it says:-

The WATFORD DDFS filing system is for use with the 1770 chip and supports
double density.

New in v1.53

Full TUBE compatible
Formatting now skews the sectors to produce a disc that works faster
DFS commands can now be prefixed with an O
DFS now retains information over a soft Break. Libraries, directories, WORK
command, drive, OPT settings, file status, density and double stepping are
all retained as long as DFS workspace is not corrupted.
*HELP SPACE and *HELP FILES now work fully on Econet.
*CAT which fully exploits screen width has been further improved.
*FX commands for 40/80 switching have been replaced by two new *OPT
commands.

The combination of a 1.53 (or later) DFS with DNFS now eliminates the DFS
aspect of the DNFS. This means that *HELP will not show the DFS 1.2 and PAGE
will not be altered by the combination of DFS and DNFS together. The TUBE
and Econet aspects of DNFS are not affected.

There is also a new and effective 8271 emulation built in.
The 1.53 DDFS will run the Acorn Level 2 Econet File server system.

DDFS-1.54T.rom
for the 1770 board

Hope this helps.

Mark