Date : Wed, 08 Jun 2005 02:50:38 +0200
From : John Kortink <kortink@...>
Subject: Re: GoMMC versus hard drive. Which way to go?
On 07 Jun 2005 23:56:08 +0100, Jonathan Graham Harston wrote:
>> Message-ID: <i82aa1ta282t9ru1qrql6terkrcd2k42gs@...>
>
>John Kortink <kortink@...> wrote:
>> Oh, and the IDE solution is Master only at the moment
>> (correct me if I'm wrong). GoMMC works on BBC B, B+,
>
>The IDE interface, both the 8-bit and the 16-bit versions, work on
>both the Master and the B, as well as the B+, the Compact (with an
>appropriate edge connector), the Electron (with a 1MHz expansion)
>and even a RISC OS machine with a BBC I/O podule[1].
Of course, given software (and in some cases, especially
the Electron, third party hardware) IDE on everything with
a 1 MHz bus, MMC on everything with a ROM socket.
However, I supposed the current state of affairs is more
relevant, for prospective upgraders.
>I have only patched ADFS 1.50 for the Master so far. I have looked
>through ADFS 1.30 for the BBC B, but haven't started work on it.
>
>HADFS for any 8-bit BBC series computer will access an IDE drive.
>Currently, it is limited to single logical drives being a maximum
>of 16M. I am carefully working through the code to increase the
>sector addressing from 16 bit to 24 bit, so allowing drives up to
>2^(24+8) bytes in size - 4G I think.
That would certainly be cool(-ish). ;-) I suddenly feel a
need to check the GoMMC code for 4 GB compatibility ! ;-)
>As ADFS on the BBC B pushes PAGE up considerably (six pages, I
>think), I think HADFS would be a better filing system to use on
>that machine as it only claims one (additional) page of workspace.
>That's why I'm concentrating on HADFS at the moment.
>
>[1]Of course, there's no software that would access a RISC OS BBC
>I/O podule as a filing system - but that's no reason for somebody
>to attempt it!
I agree. None whatsoever ... (But I suppose you meant to say
'not to attempt it').
John Kortink
--
Email : kortink@...
Homepage : http://www.inter.nl.net/users/J.Kortink