Date   : Fri, 01 Mar 1996 09:07:37 +0000 (GMT)
From   : James Fidell <james@...>
Subject: Re: Emulation systems

> > All disk images can be split into separate files with headers. MacBeebEm's
> > headers have the following 10-byte format...
> > 
> >   Offset        Value
> >      0          255
> >      1,2        lo, hi load address
> >      3,4        lo, hi exec   "
> >      5          checksum *
> >      6,7,8,9    spare and may take any value
> >[...]
> > Perhaps we can have some discussion and agree on a standard header.
> 
> i) can we have the first four bytes as a four-byte filetype identifier
> (such as "MBBC" or something)

Definitely a good idea.

> ii) surely for bytes 6-9 you mean '0; reserved for future expansion' ;)

I think there should be some sort of version number included, too -- that
way if the spec. has to change for any reason, the image format can
safely be extended whilst allowing the software to identify the image
type and choose the correct loading method accordingly.

James.

-- 
 "Yield to temptation --             | Work: james@...               
  it may not pass your way again"    | Play: james@...                 
                                     | http://www.OiT.co.uk/~james/
        - Lazarus Long               |              James Fidell