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ADDENDUM

ARCHIMEDES ARTHUR ROM FITTING INSTRUCTIONS

Acorn Computers Ltd are now using an additional supplier of ROMs, therefore, you may have been
supplied with the ROMs described in this Addendum rather than one of the sets referred to on page two of
the Archimedes Arthur ROM fitting instructions.

The set is numbered: 1, 2, 3 and 4, and although labelled Arthur 1.1, in fact contains Arthur 1.2.

The ROMs are installed in the following sockets:

ROM 1 in IC24
ROM 2 in IC25
ROM 3 in IC26
ROM 4 in IC27.

Refer to the Fitting instructions for information on how to carry out the upgrade.

©Acorn Computers Limited 1987
Published by Acorn Computers Ltd
Part number 0476,353

Содержание Archimedes 300 series

Страница 1: ...ers please insert your old 0 2 ROMs into the protective foam which carried your new 1 2 ROM set and return the 0 2 ROMs to Acorn using the envelope and reply paid label provided in this pack This request does not apply to Arthur 0 3 owners REMOVING THE TOP COVER FROM THE COMPUTER CASE 1 Switch off your Archimedes and disconnect the unit from the mains by unplugging the power supply cable 2 Unplug ...

Страница 2: ...therwise you may bend the pins or damage the sockets If you are using a screwdriver be careful not to catch the ribs of the sockets IDENTIFYING THE ICs The upgrade kit consists of four ROMs The way in which the ICs are labelled and their appearance depends on the manufacturer Before inserting the ICs it is important to clearly identify the type of ICs you are supplied with Using the table below id...

Страница 3: ... end of the socket If you have grooved ICs you should position the IC so that the groove is on the left hand side of the IC In either case the four free positions should be left at the notched end of the socket See diagram below A 28 pin IC in a 32 pin socket 7 Line up all the pins over socket IC24 Ensure that the notch on the IC points towards the notched end of the socket or that the groove is o...

Страница 4: ...ug in the mains supply TESTING THE UPGRADE 1 Switch on the monitor 2 Hold down R on the keyboard and switch on your Archimedes 3 If you get a rolling broken picture displayed then switch off your Archimedes and complete step 4 below 4 Hold down R on the keyboard and switch on again After approximately half a second the monitor should display a stable picture of the Desktop The installation is now ...

Страница 5: ...red to on page two of the Archimedes Arthur ROM fitting instructions The set is numbered 1 2 3 and 4 and although labelled Arthur 1 1 in fact contains Arthur 1 2 The ROMs are installed in the following sockets ROM 1 in IC24 ROM 2 in IC25 ROM 3 in IC26 ROM 4 in IC27 Refer to the Fitting instructions for information on how to carry out the upgrade Acorn Computers Limited 1987 Published by Acorn Comp...

Страница 6: ...Archimedes 300 series PCB showing the position of the four ROM sockets ROM 1 is in socket IC24 ROM 2 is in socket IC25 ROM 3 is in socket IC26 ROM 4 is in socket IC27 FRONT OF MACHINE ...

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