Acorn ECONET Manuel - Sayfa 4

Kontrol Ünitesi Acorn ECONET için çevrimiçi göz atın veya pdf Manuel indirin. Acorn ECONET 4 sayfaları. Fitting

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)

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