Date   : Fri, 24 Oct 2008 15:58:47 +0100
From   : christopher.whytehead@... (chris whytehead)
Subject: A500 development ROMs

>
> > That's plausible.  It's a pity the scan of the circuit diagram
> > isn't good enough to read the date.
>
> I think I can just about make out 20/12/85 in the Change Level
> block on the right hand side of the schematic ...
>
I have checked the original very faded circuit diagram and it does indeed
say 20.12.85 in the Change Level block

> > Chris's webpages state that his A500 came from Paul Fellows
>
It did indeed and came with a set of Arthur 1.20 and RISC OS 2 development
ROMs. The RISC OS 2 ROMs only had 7 modules, the remaining modules were
loaded from disc. I can't find the status of the Arthur ROMs but again they
were a different build date from the production ROMs.

> ... whilst the Brazil romset present on my A500 Co-Pro (which
> also came from
> Paul F) is dated 14th August 1986:
> http://bbcmicro.net/old-8bs/see/RISCcopro_help.jpg
> http://bbcmicro.net/old-8bs/see/RISCcopro.jpg
>
I really must try and dump the ROMs on the A500 co-processor, anyone
recommend an EPROM programmer/reader to do this?

Chris