What is this??? - Update

From: Jules Richardson <julesrichardsonuk_at_yahoo.co.uk>
Date: Mon Jun 14 16:54:31 2004

On Mon, 2004-06-14 at 21:40, Carsten Brasholt wrote:
> Hi again,
>
> I just opened it up....
> It's got 5 chips inside it.
> 74LS00
> 74LS74
> 8251AP-5
> 74LS32
> 4060
>
> Does this help??
>
> I know that prestel is some sort of teletext service - and perhaps a
> dial-up service, but this unit doesn't really look like it's related to
> a modem.....

The 8251 is a serial comms chip - looks like you have an Amstrad
cartridge giving you a serial port on the DIN plug, to which you'd
connect up a serial modem in order to access Prestel.

I have a feeling Prestel was 1200 baud downstream and 75 baud upstream,
but someone else will know for sure :-)

cheers

Jules
Received on Mon Jun 14 2004 - 16:54:31 BST