Mitsubishi Electric Apricot Installation Manual Download Page 20

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CPU module upgrades

If your computer is fitted with an 80486SX CPU module it
can be upgraded by fitting an 80486 CPU module.
depnding the the processor clock speed it may also be
possible to upgrade an 80486DX based system to a faster
processor.

Contact your Apricot supplier for information about the
availability of such modules.

Summary of Contents for Apricot

Page 1: ...apricot Qi 486 ADD ON INSTALLATION GUIDE MITSUBISHI ELECTRIC ...

Page 2: ...tware may be used or copied only in accordance with the terms of this agreement It is against the law to copy any disk supplied for any purpose other than the purchaser s personal use All rights reserved no use or disclosure without written consent Copyright Apricot Computers Limited 1992 Published by ApricotComputersLimited 3500Parkside Birmingham Business Park B37 7YS MITSUBISHIELECTRIC Printed ...

Page 3: ...1 Contents Introduction 2 Anti static precautions 3 Installing extra memory 4 Installing an 80487SX in Qi 486SX 11 CPU module upgrades 18 ...

Page 4: ...ng Never carry out any work on the computer with power applied Always switch off at the mains and remove the power lead from the system unit before starting work Before you start installing the upgrade you should be thoroughly familiar with all the relevant instructions in this guide and the appropriate sections of your Owners Handbook CPU module upgrade The system boards in Qi 486SX and Qi 486 ha...

Page 5: ... can render components useless or severely shorten their working life therefore you should always take preventative measures No work should be carried on any item unless it is in a Special Handling Area SHA as defined in BS CECC 00015 Part 1 In general this involves a common earth point an earthed bench or bench mat an earthed wrist strap ...

Page 6: ...Capacity Set 0 Set 1 1 Mbyte 256k 2 Mbyte 256k 256k 4 Mbyte 1M 5 Mbyte 256k 1M 8 Mbyte 1M 1M 12 Mbyte 2M 1M 16 Mbyte 2M 2M If you do not know how much memory is fitted to your system you can find out when you switch your computer on During the power up sequence on board memory is tested and the capacity is displayed on the screen On the start up screen two memory capacities will be shown base and ...

Page 7: ...pacity The memory sockets are labelled MM1 to MM8 note that the sockets are not numbered in sequence TOWARDS REAR OF MACHINE TOWARDS REAR OF MACHINE TOWARDS REAR OF MACHINE TOWARDS REAR OF MACHINE 256 KBYTE MODULES 1 MBYTE MODULES 256 KBYTE MODULES Orientation 1 Mb 2 Mb 4 Mb MM4 MM8 MM3 MM7 MM2 MM6 MM1 MM5 ...

Page 8: ...S REAR OF MACHINE TOWARDS REAR OF MACHINE TOWARDS REAR OF MACHINE TOWARDS REAR OF MACHINE 1 MBYTE MODULES 2 MBYTE MODULES 2 MBYTE MODULES 5 Mb 8 Mb 12 Mb 16 Mb 1 MBYTE MODULES 256 KBYTE MODULES 1 MBYTE MODULES ...

Page 9: ...accessible with the system unit cover removed To obtain access 1 Take suitable anti static precautions 2 Remove the system unit cover as described in your Owner s Handbook 3 Identify the SIMM sockets from the illustration below SWITCHES SIMMS ...

Page 10: ... Lever the metal clips on each side of the socket gently away from the SIMM using your thumbnails When the clips are far enough apart the top edge of the SIMM will move forward until the SIMM is at an angle of about 15 3 Taking care to avoid touching any of the components on the SIMM grip the top corners of the SIMM between thumb and first finger and carefully pull the SIMM out of the socket 4 Rep...

Page 11: ...hips are facing the rear of the system unit with the metal connector strip nearest the system board 2 Position the SIMM above the socket at an angle of about 15 3 Lower the SIMM towards the socket The right edge of the SIMM will be prevented from reaching the connector by the securing clip 4 Allow the left edge of the SIMM to drop into the connector 5 Push the SIMM gently to the right and lower th...

Page 12: ...the vertical position by pushing gently on the top corners 8 If the SIMM is properly located the SIMM should remain in position held by the securing clips and with a small plastic lug through the holes on either side of the SIMM ...

Page 13: ...t reconfigured before the 80487SX can be installed Identifying the 80487SX socket 1 Take suitable anti static precautions as described in your Owner s Handbook 2 Obtain access to the system board as described in your Owner s Handbook 3 Identify the tape drive mounting plate at the front left of the system unit 4 Remove the four screws that secure the plate and lift it clear of the system unit Note...

Page 14: ...X socket If the socket is unoccupied and an 80486SX is soldered to the CPU module as shown you can install the 80487SX as described in Installing the 80487SX If the socket is occupied by an 80486SX before you install the 80487SX you will have to remove the 80486SX using a suitable extraction tool and reconfigure the socket ...

Page 15: ...ocket will already be configured for an 80487SX If an 80486SX is installed in the socket it must be removed and the socket reconfigured before the 80487SX can be installed The socket is configured by a four pin jumper block and two position switch alongside the socket SYSTEM BOARD JUMPER SWITCH ...

Page 16: ...g illustration SYSTEM BOARD If the jumpers and switch are not as shown above reconfigure the socket by moving the jumpers and switch to the correct positions Note If the socket is configured for an 80486SX a second jumper should be fitted to one of the unused posts on the jumper block This allows the socket to be reconfigured for an 80487SX ...

Page 17: ...itted and the switch may be in either position The switch will normally be away from the socket as shown in the following illustration SYSTEM BOARD Note A second jumper should be fitted to one of the unused posts on the jumper block This allows the socket to be reconfigured for an 80487SX ...

Page 18: ... of paint Carefully position the 80487SX above the socket with the positioning guide at pin 1 3 Gently insert the 80487SX making sure that it is correctly aligned with the socket and that you do not bend or otherwise damage the pins 4 Reassemble the computer 5 Reboot the computer with the Reference SETUP diskette and reconfigure it for the co processor Warning Always ensure that the system unit is...

Page 19: ...nd earth tag ADAPTER POWER CABLE TAPE DRIVE TAPE DRIVE COVER SIGNAL CABLE 2 Lift the drive cover clear 3 Lift the drive far enough to allow access to the power and signal cables at the rear of the drive and disconnect them 4 Lift the drive clear 5 Once the 80487SX has been installed the drive may be replaced by reversing the removal procedure Note Ensure that the earth tag is secured by the screw ...

Page 20: ... CPU module it can be upgraded by fitting an 80486 CPU module depnding the the processor clock speed it may also be possible to upgrade an 80486DX based system to a faster processor Contact your Apricot supplier for information about the availability of such modules ...

Page 21: ...apricot MITSUBISHI ELECTRIC APRICOT COMPUTERS LIMITED 3500 PARKSIDE BIRMINGHAM BUSINESS PARK BIRMINGHAM B37 7YS Part No 15007631 Revision 01 ...

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