Date   : Fri, 07 Apr 2006 14:08:23 +0100
From   : "Mike" <profpep@...>
Subject: Re: Using an AKF30 with a Beeb

Fragula wrote

> Kris Adcock wrote:
> > I'm guessing the refresh-rates it deals with are low enough
> > for a BBC micro, and would give me a better picture quality than the
> That was a good conversation killer.. Nothing in here for over 24 hours
> now!
>
> In leiu of anyone more knowledgable opening their traps, and with the
> gotcha that I'm not sure about the specific monitor.. I'm talking about
> old IBM ones. if yours is in fact CGA, then its probably at least based
> on that.

There is an MDF for this at:
http://www.arcsite.de/hp/cms/mdf/akf30_40

This quotes vertical at 50Hz - which makes it PAL of sorts. Can't figure the
horizontal frequency from the MDF. Standard PAL is 15,625 Hz Horizontal.

Acorn 9 pin monitor outputs (from Archi 300/400 series manual)

1    Red
2    Green
3    Blue
4    CSYNC (composite sync)
5    NC
6    0V
7    0V
8    0V
9    0V

Looks like you might need some kind of resistive attenuation as in a SCART,
since it's analogue RGB

||\/||ike