Date : Mon, 21 Aug 2000 18:51:46 GMT
From : "Julian Stenning" <julian_stenning@...>
Subject: Re: Floppy Drives
Thanks for your suggestions. I've now got the lids of both drives...
The drive I am currently using as the 1st unit is a Mitsubishi M4853 (dated
December 82). On the pcd is printed a row of jumpers titled 'DS'. They are
labled 0, 1, 2, 3, MX, HS and HM. 0 and HM are selected. I can also see the
terminator is in place.
The second drive is similar (Mitsubishi M4853-112U May 84). It also has the
terminators in place. There are 3 sets of jumpers, the first is titled DS
and has 3, 0, 1, 2, MX (1 is selected), the second has DC, 2S, MM, MS, UI
(MM is selected), and finally HS, HC, HM, HL, HH (HS is selected).
Anyone know what the abreviations mean?
I'll go and remove the extra set of terminators.
Regards,
Julian.
>From: "Mark Usher" <mu.list@...>
>To: <bbc-micro@...>
>Subject: RE: [BBC-Micro] Floppy Drives
>Date: Mon, 21 Aug 2000 19:07:28 +0200
>
>The drive that was reliable will probably be unreliable because the
>termination is then incorrect. Only the drive at the end of the cable
>should
>be terminated. Swapping the drives would also have no effect as one is
>jumpered as 0 and the other as 1. It is not like the PC where both are
>jumpered the same (hence the twist in the cable).
>
>Mark
>BBC Documentation Project
>http://members.magnet.at/marku/bbc/
>
>
> > -----Original Message-----
> > From: owner-bbc-micro@...
> > [mailto:owner-bbc-micro@...]On Behalf Of Julian Stenning
> > Sent: 21 August 2000 16:22
> > To: bbc-micro@...
> > Subject: [BBC-Micro] Floppy Drives
> >
> >
> > Hi all,
> >
> > I have two 5 1/4 inch drives connected to my bbc and have a small
>problem
> > which I will try to describe.
> >
> > On the first drive (sides 0 & 2 from the beeb), when I access a
> > disk I hear
> > a 'clunk' just after the drive spins up. I assume that this is the head
> > being lowered or something similar. This drive works fine and is
>reliable.
> >
> > When I access disks in the second of the 2 drives (i.e. sides 1 &
> > 3 from the
> > beeb), I hear a 'clunk-click-clunk' as though the head goes down,
> > then rises
> > before going down again. It is hard to tell if the noise comes from 1 or
> > both drives. The 2nd drive is often unreliable.
> >
> > I have swapped the drivers around and get the same results - the
> > drive that
> > was reliable also becomes unreliable as the 2nd device.
> >
> > Sorry to be so vague, but is there something I need to
> > remove/add/modify to
> > get both drives working together?
> >
> > Best regards,
> >
> > Julian.
> > ________________________________________________________________________
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> >
> >
>
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