Specifications

3000
Fitting an Econet module
1 Follow the procedure in the next chapter for
removing the cover of the computer.
2 Plug the module onto the PCB connectors:
3 Replace the cover of the computer.
4 Run the dealer test software to test the correct
function of the computer and the Econet module,
and of any other upgrades fitted. Refer to the
appropriate Econet file server Manager's Guide for
instructions on setting the station id.
External expansion
-Interface
Introduction
The A3000 computer supports an external expansion
card (podule) interface, although with some minor
differences from other ARM based systems:
• Single +5Volt power supply rail, rated at a maximum
of 1 Amp (no +12 or —5 Volt rails provided)
• No support for Co-Processor type cards
• The external expansion card is in software slot 0
• The podule must be capable of driying 3 TTL and
7HCT loads on the data bus.
Refer to the application note 'A series podutes' (
referenced at the start of this chapter) for a full
podule interface specification.
Physical dimensions
As the podule is external to the computer enclosure
there is no real limit on the size of the unit. Care should
be taken not to block off any of the other expansion ports
on the rear of the computer.
Fitting an expansion card
WARNING
Power down the computer before fitting an external
expansion card.
It is anticipated that expansion cards will be fitted into a
suitable external expansion card unit. Slots are provided
underneath the case of the computer, into which a
tongue in the case of the expansion card unit can locate.
Tapped holes are provided in the backplate of the
computer to enable the expansion unit to be secured to
the computer with two M6 screws.
Connector
The podule interface is provided via a 64 way DIN
41612 socket fitted at the rear of the computer:
The connections to the interface are shown overleaf.
A3000 expansion