CompuPro DISK 3 User manual

A243 $20.00

DISK3
TECHNICAL MANUAL
HARD DISK CONTROLLER
FOR ST-506 COMPATIBLE DRIVES

DISK 3 TECHNICAL MANUAL
Copyright 1983 CompuPro
Hayward, CA 94545
File name: DISK3.MAN
Document # 11945
Board No. 194, Revision G
First edition: October 1983
Latest edition: October 1984
DISCLAIMER - CompuPro makes no representations or warranties
with respect to the contents hereof and specifically disclaims any
implied warranties of merchantability or fitness for any particular
purpose. Further, CompuPro reserves the right to revise this
publication and to make any changes from time to time in the
content hereof without obligation of CompuPro to notify any person
of such revision or changes.
Trademark: DISK 3; CompuPro.
-Registered Trademark: CP 1M; Digital Research, Inc.
All rights reserved. No part of this publication may be reproduced
or transmitted in any form, or by any means, without the written
permission of CompuPro. Printed and assembled in U.S.A.

CONTENTS
How to get your DISK 3 up and running
Installation procedures ..................... 1
Testing ....................................... 6
Trou bleshooting ............................. 8
DISK 3 Technical Information
In trod uction ................................ 9
Hardware interface ........................ 9
Software overview ......................... 10
Software interface ........................ 10
Specify format ............................ 16
Appendix .................................. 17
Hard ware Section
Logic diagram .......................... 20-23
Parts list .................................... 24
Componen t la you t. ......................... 25

HOW TO GET YOUR DISK3 UP AND RUNNING
WITHOUT READING THE MANUAL
Eager to get your new DISK 3 running? Careful installation is
needed to assure proper function of this board.
DISK 3 INSTALLATION PROCEDURES (For use with the CompuPro H40
Hard Disk Subsystem.)
STEP 1. UNPACK DISK 3 BOARD.
Along with the board, you will find
an extra jumper shun t and two card
ears in the plastic bag.
STEP 2. INSTALL CARD EARS.
a) Hold the board so the component side
is toward you. (See diagram below.)
b) Insert the peg on the card ear into
the hole in the right corner of the
board. Fold the ear over the board's
edge until the ear's hole snaps over
the peg (make sure the long edge of
the ear is along the top edge of the
board.)
c) Repeat for left ear.
Figure 1: DISK 3 (Component Side)
card ear

STEP 3. SET SWICHES. Check the DISK 3 switch settings (see
figure below for the location of Sl. We recommend that
switch positions which are NOT USED be set off. (The
switch settings are for MP/M
TII 8-16'"
Version 2.1 I and
Concurrent DOS 8-16. Check your software documentation
for the latest update on the switch settings).
The black dot (.) shows which side of the switch should be down.
SWITCH 1: S1
OFF ON
m:::::J 1
c::::m
2
c:::;:mJ
POSITION SET IT
1 ................. OFF
2 ................. ON
3 ................. ON
4 ................. OFF
5 ........•........ ON
6 ................. ON
7 ................. ON
m:::::J 4
c:::::m 5
c::::m6
c:::::::m 7
~8
8 ............ (NOT USED)
S1
J7
J8
J10
Figure 2. DISK 3 (jumper and switch location)
2

STEP 4. CHECK JUMPER SHUNT CONNECTORS
Make sure the jumper shunts are installed as listed below. (See
figure 2 on previous page for locatio'n of jumper connectors labeled
J7, J8, J9, JI0 and Jl1). J6 is unused.,
JUMPER SHUNTS
n01Ch--..'
A jumper shunt is a small plastic part used
to connect two pins on the jumper connector.
Jumper shunts should be installed notch
side down.
ACB
~
~ J7 should be connected from B-C.
• I!:!l
I!:!l.
~ J8 should be connected from A-C .
• (Ol •••••••
.l!.I •••••••
01234567
o~
J9 is for the interrupt selection.
Use position I for VII.
1 •• ""
2 •• '''' JI0 selects the data bit for reset.
3 •• The top position is for DO.
4 ••
5 ••
6 ••
7 ••
P3 ••
P2 U
P1 U
Jumper the middle two positions of Jll
PO ••
J11
IF: The board is not correctly jumpered.
THEN: Use a pair of needle nose pliers to gently
remove, and carefully replace the jumper
into its proper location.
jumper shunt,
.. ~:::=---------
3
!

CONNECT THE CABLES FROM DISK 3 TO THE HARD DISK SUBSYSTEM.
Place your hard disk subsystem near your computer enclosure. Make
sure it is on a stable surface to reduce vibration when the
computer is working. Make sure it is not located near telephones
and magnetic fields (like those created by a generator). If you
need to remove the cover from the computer, do not use a magnetic
screwdriver.
CABLE INSTALLATION. Cables must be connected correctly. Be sure
that when you assemble the .cables the red stripe is always on the
same side, and the connector plugs are inserted properly. You
could connect these cables in any order. We recommend the
following procedure.
WARNING: BEFORE YOU OPEN YOUR COMPUTER
ENCLOSURE ALWAYS MAKE SURE THE POWER IS OFF
AND IT'S UNPLUGGED. REMOVE RINGS, WATCH, ETC.,
\VHICH CAN CONDUCT ELECTRIC CURRENT. DO NOT
. TOUCH THE POWER SUPPLY.
STEP 1. IDENTIFY CABLES. CBL14 - short 20-pin cable.
CBL17 - long 20-pin cable.
CBLl3 - short 34-pin cable.
CBLl6 - long 34-pin cable.
STEP 2. ATTACH THE CABLES TO THE BACK PANEL OF
COMPUTER ENCLOSURE.
a) Select CBL14. Insert male connector into the "Drive 1"
slot of the computer enclosure. The pins face outward and
the red stripe on the cable is on the side shown on the
back panel illustration below.
DODD
o ~ 0 o\.=------.J 0 0 \.=------.J 0 0 \.=------.J 0
o o
~ 0 o\.=------.Jo 0 \.=------.J 0 0 \.=------.J 0
s'-- ___ --'
o S ?
Hard Disk Cable Connector
\ 1 000
red stripe
CBL14 inside
CBL 17 outside
red stripe
--:---t--_ CBL 13 inside
CBL16 ou tside
Figure 3. COMPUTER ENCLOSURE - (back panel outside)
4

INSIDE ENCLOSURE
OUTSIDE ENCLOSURE
b) Attach connector to back
panel with the hardware
that came with the system.
(Nut/lockwasher inside and
jack screw Iflat washer out-
side the enclosure.)
c) Select CBLI3. Insert the
male connector into the
slot inside the back panel
la beled for the 34-pin hard
disk cable. (See diagram
on the previous page.)
d) Attach the CBL13 connector
to the back panel as in
step b) above.
STEP 3. INSERT THE DISK 3 INTO THE MOTHERBOARD. Place the board
into the slot closest to the back of the enclosure. The edge connector
is offset, so that the DISK 3 will fit ~ with the component
side facing the form panel of the enclosure. PUSH DOWN GENTLY
UNTIL THE BOARD IS FIRMLY INSTALLED.
STEP 4. ATTACH THE CABLES TO THE DISK 3. (Face the component side
of the board.)
a) Pick up the female connector, of
CBL 14. Keep the red stripe on
the cable to the left.
b) Gently slide the connector onto
J 1. (See component legend on the
board or diagram on page 2 for
location of J 1.)
c) Next gently slide the connector of CBL13 onto J5. (See
component legend on the board or diagram on page 2 for
location of J5.) Keep the red stripe on the left side on
the connector.
5