Tandata td2500

From: Tony Duell <ard_at_odin.phy.bris.ac.uk>
Date: Mon Oct 20 12:03:40 1997

On Mon, 20 Oct 1997, Vincent Murray wrote:

> I recently picked up a Tandata td2500 at a London, UK car boot sale.
> Does anybody know what it is? It is basically a keyboard with outputs on

It's probably a Prestel (UK's viewdata service run by British Telecom)
terminal. Tandata units were used for home banking, etc in the late
1980's. It will contain a CPU, some VDU chips (probably the SAA50x0
series, which were designed for Teletext TV receivers), and a 1200/75
modem. The later may be partially based round a chip called the SAA5070
(LUCY, for some strange reason) from Philips.

Tandata were, I believe the remains of Tangerine, the company who made the
Tangerine series of eurocards, the Microtan, etc, and who designed the HH
Tiger and the Oric.

> the back for TV video, composite video, RGB (SCART), serial data, and a
> lead to plug into a telephone outlet. The power supply is missing and plugs
> into a 4 pin DIN plug - any info on voltages to use to power it up. The unit
> was made by Tandata UK Ltd.

Look inside to see if it has internal voltage regulators (7805, etc) or if
it's expecting a regulated 5V input. I would think it will need +5, +12
and -12 _in the end_, but it may want a few V higher fed into it if it
contains its own regulators

> Vincent Murray
> Email v.murray_at_unsw.edu.au

-tony
Received on Mon Oct 20 1997 - 12:03:40 BST