The pin 1 end of the IC (see NOTE 2) should face to the WEST. If you are unsure of
which way round the IC should be installed, refer to the other ICs on the main PCB
which all face WEST.
Apply firm pressure to the IC, but do not force it. When the chip is in place it may appear
to be slightly raised. Check that all the pins have entered the socket and that none are
bent either outwards or under the body of the IC.
When the ECONET module P.C.B and the ANFS ROM have been installed, the re-
assembly procedure is the reverse of the dismantling procedure.
Setting the station number
Before attempting to add a machine to an existing ECONET, the station number must be
set. The network manager should be asked to carry out this operation.
NOTE 1: Sockets IC37 and 41 share the same address space as four sideways RAM
pages. The position of links LK18 and LK19 determine whether the address space is
claimed by ROM or sideways RAM.
These two links are located close to the WEST side of ICs37 and 41 (see fig 1.), LK18 is
used with IC41 and LK19 is used with IC37. These links consist of a three pin plug with
a connector which may be push fitted onto two pins of the plug to make a connection.
There are two possible positions for this connector:
EAST - the connector joins the central pin to the right hand pin (enables sideways
ROM)
Or
WEST - the connector joins the central pin to the left hand pin (enables sideways
RAM)
The use of one of the sockets with a ROM will preclude the use of 32K (two 16K pages)
of sideways RAM. If both IC37 and IC41 are used in conjunction with sideways ROMs,
all four of the 16K sideways RAM pages will be unavailable.
If IC27 is already occupied and you need all four pages of sideways RAM, you will need
to fit the ANFS ROM into an EPROM cartridge which can then be plugged into one of
the cartridge sockets.
Further information about the use of sideways RAM/ROM may be obtained from part 2
of the REFERENCE MANUAL.
NOTE 2: Pin one is indicated in one of two ways. Either a small dot or dimple is placed
directly above pin one, or a horeshoe shaped indentation is cut into the pin one end of the
IC with pin one always being to the left of the indentation. In some instances both of
these indicators will be present.
Part No. 0443,020 Issue 1 December 1985
Содержание ECONET
Страница 2: ......
