Date   : Mon, 16 Mar 2009 00:14:37 -0000
From   : mfirth@... (Michael Firth)
Subject: BBC B+ mess up

----- Original Message ----- 
From: "John" <blip@...>
To: <bbc-micro@...>
Sent: Sunday, March 15, 2009 9:39 PM
Subject: Re: [BBC-Micro] BBC B+ mess up


>
> Thanks Michael
>
> I've posted some pictures of my setup, at www.blipit.com/bbc
>
> As far as I can see, I've avoided the obvious error of using the voice rom
> sockets, but my Beeb seems to have extra wires going to the sideways RAM
> board (compared to those pictures you linked to). I wonder if this makes a
> difference.
>
It just looks like whoever installed it ran most (all?) of the flying leads 
over the top
of the PCB, rather than underneath, as recommended. Certainly the red wire 
going
to IC46 is one of the standard ones, as it is pulling off the chip select 
line from ROM
slots 12 and 13.

>From your '*HELP' output, it looks as though the DFS ROM is no longer 
present,
which would mean you would only get a '64K' banner, as I mentioned before.
Do you really need COMAL and VIEW as ROMs, rather than use SWR?
If so, I guess one option is for you to get hold of one or two 27256 ROMs 
(or
compatible) and program (or get someone to program) some of your 4 16K ROMs
into 32K ones. That would then free up more ROM slots.

> What would really make my day is if someone on the list had a BBC B+ with
> working GoMMC and could post a picture of the wiring. JKs site would 
> benefit
> from this also.
>
I'm afraid I went down the IDE CF route, rather than GoMMC, so can't help 
you directly
there.

>From the instructions on JK's site, it doesn't sound that complex though - 
you need a
'special' version of GoMMC (unfortunately it doesn't seem to say what's 
different about the
'special' one)

Then you install 5 jumpers horizontally across all the pins of the 
configuration header, install
it in a ROM socket, and make sure that the relevent 'S' link is on the right 
pair of pins, rather
than the left (default, and the position all yours are in in the pictures 
you posted).

If you are wanting to install it in the empty ROM slot in the pictures, then 
it is the topmost of
the 5 jumpers you need to move (S19 is actually a track, so its S18 you'll 
be changing)

Hope this helps

Michael