Date   : Fri, 25 Aug 2006 09:45:31
From   : "Wright, Chris" <Chris.Wright@...>
Subject: Re: writing and reading on 3.5 floppy

As an aside, does anyone know where I might acquire a data lead to
connect a 5.25" and a 3.5" floppy at the same time (e.g. combo drive) ?
The 5.25" drive connector seems to be an edge type connector whereas the
the 3.5" is the more usual PC floppy style double row connector.

-----Original Message-----
From: Majordomo List Manager [mailto:majordomo@...] On Behalf
Of Jonathan Graham Harston
Sent: 24 August 2006 01:13
To: bbc-micro@...
Subject: [BBC-Micro] Re: writing and reading on 3.5 floppy

>Message-ID: <BAY105-F24DFEECD3F1894A3542A6DD1460@...>
 
"salahdin mahmud" <tbkc@...> wrote:
> I have heard of a patched dfs 1.21 but hav also tried 3 *fx commands
which
> according to sprow do the same timing trick. I have tried the fx
commands
> 
> So does the patched dfs do a lot more than the *fx commands and wsill
it
> enable me to save and load games to the sony floppy drive?
 
There is no such fx command that does what DFS 1.21 does, which is
ignore Disk Error 10 - Drive not ready. The *fx255 command changes
the drive stepping speed.
 
There seems to be such confusion and counter-arguments about what
happens to cause the Disk Error 10 that I have removed such
explanations and now just refer to "Disk Error 10 occuring when
using 3.5" drives".
 
It changes some code from:
 
DEC tries
BPL TryAgain
JMP ReturnError
 
to:
 
DEC tries
BPL TryAgain
JMP CheckError
...
.CheckError
CMP #&10
BNE JumpBack
JMP ReturnError
.JumpBack
JMP TryAgain
 
so that whenever the low level code return result=&10 it ignores
it and tries again.
 
See http://mdfs.net/Apps/Filing for DFS 1.21
 

-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
BBC BASIC for 30+ platforms - http://mdfs.net/Software/BBCBasic