Re: Europlus slot 7 PAL colour card query

[Dave Dragon <davedragonuk@yahoo.co.uk>]

I have put a picture of the card on
http://www.geocities.com/davedragonuk/index.html
if that helps anyone recognise the card.


> In <2qcGa.662999$Si4.603546@rwcrnsc51.ops.asp.att.net> Ernest wrote:
> >
> > "Dave Dragon" <davedragonuk@yahoo.co.uk> wrote in message
> > 3EE90807.1F56EF12@yahoo.co.uk">news:3EE90807.1F56EF12@yahoo.co.uk...
> >> Hi,
> >> I recently bought a europlus Apple and in slot 7 there was a card
> >> which I assume is to give colour output to a monitor. I'm keen to
> >> find out how this card is installed or if anyone has got
> >> documentation on it.
> >
> > Does the card have an RCA jack on it?

No.

>
> >
> >> Its got "copyright microvitec ltd" and BC0054101 silk screened onto
> >> the component side, there is a large "PL1" connector with 8 pins
> >> which I guess is supposed to be video out and there are 5 jumper
> >> blocks each is 3 pin and 2 have got jumpers on them. The rest of the
> >> board contains 3 rows of TTL 7400 series chips (there are no proms
> >> eproms or PAL encoder chips).
> >
> > I'm not sure except to say that Microvitec also produced PAL video
> > monitor. I have one for my Acorn BBC Master and Electron. I have
> > aquired several Apple II clones from Germany, and almost everyone of
> > them has got a weird video card of some kind -most likely 80 column
> > Videx clone cards, and they have all sorts of wires hanging off of
> > them. Usually though, the people who pack the computers up don't
> > bother to remove the cards so when I receive the computers in the mail,
> > all of the cards are loose and flapping around inside the case.
> >
> > Most of the Apple brand PAL cards are fairly neat and simple, with no
> > wires hanging off of them. I'm not sure what card you have. Can you
> > show us a photo of it?

I have uploaded a picture at:
http://www.geocities.com/davedragonuk/index.html

>
> It sounds like an RGB encoder card to me, made by Microvitec for driving
> one of their monitors. The connector is a good clue too, 8 pins is the
> right number for an RGB output.
>
> I have a Taxan Kaga RGB card and monitor which I've used in my IIe. The
> card goes in slot 7 but also picks up 14M (the 14MHz master clock) using
> a clip to one of the ICs on the motherboard, and gets the video from the
> internal 4-pin video connector. If you want to try it, according to the
> Apple II Reference manual, in a 14M is available on pin 8 of a 74S86 at
> location B2 on the II/II+ board.
>
> The jumpers on the card could be for setting the text colours, as some
> of the RGB cards allowed you to choose a foreground and background
> colour when in text mode.
>
> --
> Roger Johnstone, Invercargill, New Zealand
>