Date   : Sat, 21 Mar 1998 14:26:12 +0100
From   : "Mark Usher" <marku@...>
Subject: Watford 13 ROM board.

Hi all

I'm still looking for some fitting instructions for the Watford 13 ROM
board.

So far I have ...

The select lines S0, S1, S2 and S3, are all neatly soldered onto IC76
74LS163.
Maybe I should have soldered them to S30b.

ENIN and ENOUT are soldered onto link 21.
This gives me the full complement of 15 ROMS.

There is still another wire coming out of the board. This is marked R/W.
This probably explains why the SW RAM doesn't work when in one of the boards
sockets. There is also a switch coming out of the board. This has no effect
at the moment, and probably is the write protect switch for SW RAM when it
is on board, but as that isn't working at the moment I can't say.

Another interesting thing was that when I got the board, there are two
sockets for the 15 slot, and 2 x 8k roms were inserted there. Where do I
switch between two x 8k and 1 x 16 k

Mark Usher
marku@...