[BBC-Micro] Help with 'B' video output (only mode7 working)

[Pete Turnbull]

On 06/04/2008 17:30, Andy Ford wrote:
> Many thanks Peter.
> 
> I looked and it is a 2023, so I removed the jumper and temporarily 
> connected the middle pin of S26 to pin 1 of IC10. Result = Perfect 
> picture! :)
> 
> I have just made a small wire (soldered a jumper to one end for just 
> clipping onto the middle of S26. I wonder if you know whether I should 
> solder directly to the IC leg (does not seem wise to me, but I can 
> solder carefully) , or whether there is somewhere nearby that I could 
> use. I notice that the track for pin 1 of IC10 is not on the top.

The recommended method is to get a short piece of wire-wrap wire or 
similar very thin wire, and solder it on the *underside* of the board, 
between IC6 pin 26 and IC10 pin 1.

If you don't want to do it on the underside, if the wire is very thin, 
you might be able to poke it into the same hole as IC10 pin 1, or IC11 
pin 1, or IC38 pin 11.  Providing you don't hold the soldering iron on 
the IC leg too long, soldering to the leg isn't likely to be a problem.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York