Date   : Mon, 13 Jul 2009 12:14:24 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Master ethernet upgrade

"Mark Haysman" wrote:
> prefer to see the data stored at the end of a file, along with an identifier
> string, for example...
> 
> end of file-!METADATA!FFFF1900FFFF0823
 
An NFS mounted on a Unix server stores the load/exec addresses as
eight additional bytes at the end of the file:
 
"If a Unix file has the extension ",lxa" then RISC OS NFS assumes
it to be a RISC OS untyped file that it created. It uses the last 8
bytes of the file to store the load and execution addresses. So, if
they were:
 
Normal contents... |67|45|23|01|EF|CD|AB|89|
                   ^                       ^
         Place where RISC OS     Place where Unix file
               file ends               file ends
 
the load address would be &01234567 and the execution address would
be &89ABCDEF."
 
TCP/IP Protocol Suite User Guide, p121
 
Whatever method is used, it should be a pre-existing method so that
files that are already copied onto the media can be accessed
without special actions being needed.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
BBC BASIC for 30+ platforms - http://mdfs.net/Software/BBCBasic