Epson I+ - Manual (Page 52)

Appendix A
Changing Jumper Settings
This appendix describes how to set the jumpers inside the Equity I+ if
you install optional devices that require different jumper settings than those
set by the factory in the main unit. It is best if your dealer installs the option
and makes all necessary adjustments when you buy it. If you decide to do it
yourself, be very careful when you follow the procedures in this appendix.
There are many system components which can be damaged accidentally.
Jumpers are small electrical connectors that alter some of the computer’s
functions. A jumper’s setting is determined by where the jumper is placed:
either between pin A and the middle pin (position A) or between pin B and
the middle pin (position B). Figure A-1 shows both positions.
Figure A-1. Jumper positions
To move a jumper from one position to another, use needle-nose pliers or
tweezers to lift it off the board and gently move it to the other position. Be
careful not to lose the jumpers or leave them out of the computer.
Jumper J1, Floppy Disk Controller
The built-in floppy disk controller in your Equity I+ can control four
360KB (5%“) or 720KB (3½“) floppy disk drives; therefore, you should not
ordinarily need to install any other type of floppy disk controller. However,
some manufacturers produce combined hard disk and floppy disk controller
cards which you may want to use to control all the drives installed in your
computer. To allow an optional controller to control your floppy disk drives,
you must connect the drives to the option card, and disable the Equity I+
built-in controller.
A-1