ADD-ON INSTALLATION GUIDE XEN-LS apricot MITSUBISHI ELECTRIC
Intel is a registered trademark, and 80386SX, 80387SX, 80486SX and 80487SX are trademarks, of Intel Corporation. AT is a trademark of International Business Machines Corporation. Information contained in this document is subject to change without notice and does not represent a commitment on the part of Apricot Computers Limited. The software described in this manual is furnished under a license agreement. The software may be used or copied only in accordance with the terms of this agreement.
Contents How to use this guide 2 Installing an expansion card 3 Installing a memory module 5 Installing a coprocessor 8 Installing an external 5.
How to use this guide This guide contains simple, step-by-step instructions for installing add-on options in your Apricot XEN-LS computer. Together with the XEN-LS Owner’s Handbook, this guide should be your only source of information when installing: * * * * AT/ISA expansion cards Apricot memory module Intel 387SX or 487SX coprocessor Apricot external 5.
Installing an expansion card The XEN-LS’s internal three-slot AT/ISA expansion card cage can hold the following card configurations: Slot Maximum card size top middle bottom three-quarter length (298 x 105 mm) full length (348 x 100 mm) half length (160 x 100 mm) Expansion cards cannot be fitted while the cage is in the computer; the cage must be removed, the card added to the cage, then the cage refitted in the machine.
5. Remove the expansion card from its anti-static wrapping. Take hold of the card by its edges, but avoid touching its electrical contacts. Firmly but carefully, push the card into the chosen expansion slot. It will only go in one way. Keep the card upright as you insert it so as not to place any strain on the connectors. Do not rock the card back and forth as you seat it in its slot. 6. Fix the card to the cage with the slot blanking plate screw. 7. Refit the expansion card cage.
Installing a memory module An Apricot XEN-LS’s system memory can be extended to a maximum of 8 Mbytes by fitting one memory module. Modules with a variety of capacities are available. Your choice of module depends on how much motherboard memory you start with, which is different for different XEN-LS models. The following table shows the total amount of memory attainable using the various memory modules.
Installation Do not remove the memory module from its anti-static wrapping until you are ready to install it. To install a memory module: 1. Take suitable anti-static precautions as described in the XEN-LS Owner’s Handbook. 2. Switch off the computer and disconnect it from the AC power supply. Remove the system unit cover, the expansion card cage and the bridge assembly as described in the XEN-LS Owner’s Handbook. 3.
6. 2 Mbyte and 4 Mbyte modules have a row of three switches along one edge (1 Mbyte, 6 Mbyte and 8 Mbyte modules do not have switches). The correct position of these switches depends on which XEN-LS model you have.
Installing a coprocessor Apricot supply three coprocessor add-ons for XEN-LS machines: * Intel 80387SX-16 for the XEN-LS 386SX-16 * Intel 80387SX-20 for the XEN-LS 386SX-20 * Intel 80487SX-20 for the XEN-LS 486SX-20 Note that your XEN-LS may have already been fitted with a coprocessor either during manufacture or by your supplier. Installation Do not remove the coprocessor from its anti-static wrapping until you are ready to install it. To install a coprocessor: 1.
4. Remove the coprocessor from its anti-static wrapping. Hold it only by its edges; do not touch the pins. The coprocessor may come in a pack with some PAL chips; these chips are not required for a XEN-LS. 5. The coprocessor has a positioning guide in the form of a small notch or circular recess at one corner; the coprocessor socket has a corresponding notch (see diagram).
Installing an external 5.25" floppy disk drive The Apricot external 5.25" floppy disk drive connects directly to the XEN-LS motherboard by a ribbon cable and is powered from the DC outlet at the rear of the system unit. The ribbon cable is threaded out of the back of the system unit through a vacant expansion slot. Therefore, installing the drive effectively uses up one expansion slot, although no expansion card is needed. While the 5.
Installation To fit an external 5.25" floppy disk drive: 1. Take suitable anti-static precautions as described in the XEN-LS Owner’s Handbook. 2. Switch off the computer and disconnect it from the AC power supply. Remove the system unit cover, the expansion card cage and the bridge assembly as described in the XEN-LS Owner’s Handbook. 3. If the computer has an internal diskette drive, disconnect its ribbon cable from the motherboard (underneath the bridge assembly) and from the drive itself. 4.
5. Plug either connector X or Y into the motherboard as shown in the diagram opposite. Use connector X if the 5.25" drive is to be drive A; use connector Y if you want it to be drive B. 6. Refit the bridge assembly. 7. Remove a blanking plate belonging to a vacant slot in the expansion card cage. If possible, use the bottom slot. 8. Refit the expansion card cage, threading the end of the ribbon cable out through the hole created by removing the slot blanking plate. 9. Replace the system unit cover. 10.
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