Table of Contents
Advertisement
INTRODUCTION
1.1 Product Description
The JEI049 is designed to control up to four floppy disk drives
(360K,720K, 1.2M and 1.44M types). They can all be mounted
internally, or two internal and two external.
There are two cables that are used to connect the JE 1049 to the
floppy disk drives. There is a 34-pin cable which carries the
control sij!nals to the floppy disk drive and returns status signals
back to the JEI049. The cable also carries data between the
floppy disk drive and the computer.
If
you will be
connect~
three or four drives, you will need an additional cable.
If
the thirQ
and fourth drives
will
be mounted internally, order cable IDC.
If
the third and fourth drives will be mounted externally, order cable
ECC.
1.2 Product Features
• IBM PC, PC/XT, PC/AT and compatibles
• Compact size
will
fit in lower height cases
• Controls any combination of 360K, 720K, 1.2Mand 1.44Mfloppy
disk drives
The JEI049 is rated to work at bus speeds up to 12MHz.
Limitations of some floppy disk drives on the market limit the
speeds at which they can be reliably accessed.
1.3 Check List
You.
should have received the following items with the JEI049:
• JE 1049 floppy disk drive controller card
• 34-pin floppy disk drive control/data cable
1.4 Terminology
Throughout this manual, a variety of common computer terms
and abbreviations will be used. For your convenience, a glossary
of standard computer terms has been included at the end of this
manual.
1.5 Precautions
When working with any circuit board or IC, some precautions
need to be observed for the safest installation. Many parts are
static sensitive and may be easily damaged by static electricity
that may have built up in your body. The best way to assure that
no damage comes to your new equipment is to observe a few
precautions:
1. Whenever you move your body, you can easily build up enough
static electricity to damage a board. When handling a board
or chips, ground yourself often. The best way to do this is with
a grounding wrist strap that is properly connected to a frame
ground. These may be purchased through Jameco Electronics
(Part
# WS).
Another method to ground yourself would be to
plug the computer's power supply into a grounded outlet (but
leave it turned om, then touch the frame of the power supply
often to dissipate any static charge that you may have built
up.
2. Make sure that the power supply is turned OFF before
installing or removing anything.
3. Hold all boards by the edges.
2
Advertisement
Table of Contents
