20 Oct
1997
20 Oct
'97
5:03 a.m.
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(a)unsw.edu.au
-tony