Date   : Sat, 04 Sep 1999 21:08:22 +0100
From   : Mike Tomlinson <mike@...>
Subject: Re: Pin-out for connecting a BBC Micro 6-pin to CGA/EGA 9-pin?

In article <4.1.19990904193346.009238a0@...>, Duncan
Entwisle <duncan@...> writes

>I've gotten the individual pin designations for both ends, but the CGA/EGA
>end seems to require both horizontal and vertical synchronisation - the BBC
>seems to have a single synchronisation pin.

It does.  Easiest way is to buffer and feed the separate syncs from pins
?39 and ?40 of the 6845 CRTC.

The Beeb generates CSYNC by combining VSYNC and HSYNC in ic ?48, 74LS86.

The ?s above mean I'm relying on dodgy memory.  Some days I have
difficulty remembering my own name.

-- 
Mike Tomlinson