[BBC-Micro] Fw: DD & HD Floppies

Dave Curran bbc at pdcurran.co.uk
Sun Oct 17 09:36:46 BST 2010


Silly question, but I'm just taking a step back from this and thinking that
instead of adapting HD disks to work in DD drives, what are the chances of
getting standard 1.44M HD drives to work on the BBC?

There are probably good reasons why this hasn't happened, just wondering if
any of them weren't insurmountable. I know there are likely to be issues
with the smaller heads used in HD drives when writing DD disks to be read on
DD drives, the same sort of issues that causes all the fun with 40 track
disks written by 80 track drives. Are there also issues with catalogue sizes
or track counts?

The ideal would be adapting one of the DFS's to work with 1.44M disks -
unless any of them do already? Otherwise some hardware mod to use HD drives
and disks as if they were DD drives and disks. Double all the track steps
and perhaps even repeat every write on the next track to increase the
chances of DD compatibility?

Just a thought?

Dave

On 17 October 2010 05:33, Rick Murray <rick at rs432.net> wrote:

> On 17/10/2010 06:19, Kieran Mockford wrote:
>
> > http://www.floppydisks.com
>
> Nice to see somebody still keeping the floppy alive. But, what, no 8"?
> <giggle>
>
>
> > There doesn't seem to be anything that indicates that they won't ship to
> > that side of the pond (this side gets free shipping, though!).
>
> I went to perform a pretend-purchase of 20 5.25s to see what sort of
> shipping would be involved. The site tries to pass you over to Google
> Checkout, at which point NoScript put its foot down:
> --8<--------
> [NoScript XSS] Sanitised suspicious upload to
> [
> https://checkout.google.com/api/checkout/v2/checkoutForm/Merchant/655251604398233
> ]
> from [http://www.floppydisks.com/view_cart.php]: transformed into a
> download-only GET request.
> --8<--------
>
> Funny. The place I get Japanese food from works fine with its bank, my
> geek-bits site works fine with its banking service. Hell, even EDF works
> when it passes you all over the place. But this one triggers NoScript.
> Probably okay, but I'm paranoid when it comes to my credit card info and
> the Internet... and if they can't get this itty-bitty detail right.....
>
>
> Best wishes,
>
> Rick.
>
> --
> Rick Murray, eeePC901 & ADSL WiFI'd into it, all ETLAs!
> BBC B: DNFS, 2 x 5.25" floppies, EPROM prog, Acorn TTX
> E01S FileStore, A3000/A5000/RiscPC/various PCs/blahblah...
>
>
>
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>
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