Date   : Sat, 10 Mar 2001 22:17:33 +0100
From   : "Mark de Weger" <mark@...>
Subject: Re: BBC Micro ROMS

Well, literally not, since a ROM is read-only.

However, there is quite a lot of software that resides in sideways RAM,
acting as ROMs, that needs to writeable sideways ROM/RAM slots.

E00 DFSs spring first to my mind. I use the Solidisk E00 DFS quite a lot.
This one uses the bottom 8K of its sideways ROM/RAM slot as program space,
and the top 8K as work space. A similar setup holds for utility "ROMs"
(which were specifically written for sideways RAM) that use part of their
16K as work space.

Also some games require writeable sideways RAM slots, eg. the expanded
version of Elite. I also recall some DTP software (Pagemaker?) that uses
sideways RAM and utilities like RAM discs and file copiers.

Success with Beebem,
Mark.

> -----Original Message-----
> From: owner-bbc-micro@...
> [mailto:owner-bbc-micro@...]On Behalf Of Richard Gellman
> Sent: zaterdag 10 maart 2001 17:47
> To: bbc-micro@...
> Subject: [BBC-Micro] BBC Micro ROMS
>
>
> Hi again.
> Just adding the finishing touches to BeebEm 1.32, and I need to
> ask a really
> odd (and possibly daft) question.
> Are there any ROMs that require them to be writable? I know that
> sounds odd,
> but it is possible to create a rom board which allows write access to a
> portion of memory within ROM space...
>
> I can't think of any ROMs that would actually do that, but just in case.
>
>
> --Richard Gellman
>
>