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- 22nd September 1992
- -----------------------------------------------------------------------------
- Support Group Application Note
- Number: 219
- Issue: 1.2 (30/10/92)
- Author: Russell Scott
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-
- Pinouts for making an Econet cable for the A3020/A4000
-
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- Applicable Hardware: A3020
- A4000
- Econet ADF10/AEH52
-
- Related Application Notes:
-
-
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- Copyright (C) Acorn Computers Limited 1992
-
- Every effort has been made to ensure that the information in this leaflet is
- true and correct at the time of printing. However, the products described in
- this leaflet are subject to continuous development and improvements and
- Acorn Computers Limited reserves the right to change its specifications at
- any time. Acorn Computers Limited cannot accept liability for any loss or
- damage arising from the use of any information or particulars in this
- leaflet. ACORN, ECONET and ARCHIMEDES are trademarks of Acorn Computers
- Limited.
- -----------------------------------------------------------------------------
- Support Group
- Acorn Computers Limited
- Acorn House
- Vision Park
- Histon
- Cambridge CB4 4AE
- -----------------------------------------------------------------------------
-
-
- The A3020 and A4000 computers can accept the standard Econet interface;
- product code ADF10, which has been used on all previous machines since the
- Master 128. In the case of the A3020 and A4000 fitting the ADF10 upgrade
- imposes limitations upon the expansion capability of the machine.
-
- This application note provides details on the implications of fitting the
- ADF10 and offers guidelines on using the interface with the above machines.
-
-
-
- Introduction
-
- Due to the positioning of the Econet upgrade in relation to the Mini-podule
- expansion slot on the A3020 and A4000 it is not possible to use both
- expansion options simultaneously unless the AEH52 Econet upgrade is used.
-
- Users who need Econet capability and who do not require the use of the
- Mini-podule expansion slot until a later date, may fit the ADF10 Econet
- upgrade. This application note describes how to install the ADF10 Econet
- interface and wire up the correct cable, so that you can connect an
- A3020/A4000 to an Econet network.
-
- Fitting the ADF10
-
- The A3020 and A4000 are manufactured with a number of Molex connectors at
- the rear of the PCB into which the network upgrade and Mini-podules are
- fitted. Figure 1 shows the orientation of the Molex connectors.
-
- (Draw file 'Figure1')
-
- Figure 1: The orientation of the Molex connectors on the A3020 and A4000.
-
-
- The bottom set of Molex connectors form the Mini-podule expansion slot, the
- remaining connectors are used by the various network interfaces. The greyed
- out areas illustrate the part of the sockets to which the pins of the Econet
- interface are fitted. Note: The dotted lines indicate the footprint of the
- ADF10 and AEH52.
-
- When fitting this interface in these machines it is recommended that the
- support pillars are not used as this may make replacement of the ADF10 with
- an AEH52 more complex at a later date.
-
-
- Making the cable
-
- The A3020 and A4000 differ from previous machines in that the network
- connector on the rear of the machine is a 15-way D-type connector instead of
- the 5-pin DIN connector. This means that station leads supplied with the
- ADF10 for example, cannot be used without modification.
-
- The simplest way to manufacture the lead is to take the Econet lead supplied
- with the ADF10 and cut off one end and solder on a 15-way D-type connector.
-
- Examine the colour coding of the cable used and ensure that you transfer the
- colour codes according to Figure 2.
-
- (Draw file 'Figure2')
-
- Figure 2: The pinouts for the Econet cable for the A3020 and A4000.
-
-
-