silvercreekvalley at yahoo.com
Thu Apr 10 13:07:43 BST 2008
I've had quite a bit of experience with 'scan
etc, and it can be tricky to get a good picture. I
several different makes of scan-doubler with the BBC
and most had issues, ie there was a noticable flicker,
distortion of the picture, or problems with colours.
In the end I found a hand made device intended for a
Color computer which worked a treat, even text was
and very usable in the higher res modes. Unfortunately
device seems no longer available (I have tried).
The device required H & V syncs which I took from the
chip in the BBC, as well as the regular RGB signals. I
3 variable resistors to get the voltages down to
which the converter needed. Although it worked OK with
the full TTL level voltage, the converters let me
the colours correctly as there was some mismatch.
My ongoing mission with the BBC B+ is to connect it to
KVM. I have the video working OK and now working on
keyboard conversion via the excellent PS2 converter
developed by Sprow. I'll let the group know if I
to get it all working.
If anyone else has experience with PS2 conversion for
BBC it would be great to here.
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