Lobo Drives Max-80 Manual

HARDWARE SETUP

HARDWARE SETUP
HARDWARE SETUP MANUAL
CONTENTS
TABLE OF CONTENTS
1 UNPACKING....... ...............H S-1
Save Your Packing Instructions! ........ HS-1
Unpacking Instructions ............. HS-2
2 HARDWARE ASSEMBLY .................. HS-5
Before You Start ................ HS-5
MAX-80 Back Panel
............... HS-7
3 DRIVE INSTALLATION ................. HS-9
Minifloppy (5-1/4 Inch) Disk Drives ...... HS-9
8 Inch Floppy Disk Drives ........... HS-13
Winchester Hard Drives
............. HS-17
Boot Drive Selection Switch
.......... HS-18
4 OTHER INTERFACES .................. HS-21
Serial Ports .................. HS-21
Printers With Parallel Interfaces
....... HS-23
Video Hookup
.................. HS-24
5 PLUGGING IN ..................... HS-25
6 DISKETTE CARE a*.................. HS-29
LOB0 SYSTEMS HS- i
VERSION 1.1

HARDWARE SETUP
LOB0 SYSTEMS
CONTENTS
VERSION 1.1

HARDWARE SETUP UNPACKING
SAVE YOUR PACKING MATERIALS! UNPACKING
In order to remain covered under Lobo's full year warranty, you
must save all original packing materials
-- and use them if your
equipment is being transported for ANY reason. If the original
packaging is lost or damaged, replacement materials can be
purchased from Lobo Systems at cost.
The major components of your system are packaged together with
the appropriate manuals, cables and software. The major
components are:
MAX-80 with CP/M and manuals
LDOS with manual
Monitor
Dual 5-1/4 inch floppy system (with either 40 or 80
track drives)
Dual 8 inch floppy system
5-1/4 inch hard drive
Printer
Modem.
If you have ordered more than one of these components and it does
not arrive within two days of the other equipment that you have
ordered (and we have not sent you a notification of delay), then
contact us immediately. Call Lobo Systems' Sales Department. In
the Continental U.S., except for California, the toll free phone
number is [phone]; in California the number is (800) 322-
6103.
LOB0 SYSTEMS
VERSION 1.1

HARDWARE SETUP
UNPACKING
UNPACKING INSTRUCTIONS
First, and most important, do not throw out either the shipping
list or the packing instructions from ANY of the boxes that
contain your system.
The list tells you not only what has been packed, but also what
our shipping department was told should be included in your
order. If there is any discrepency, notify us immediately.
Again, call Lobo Systems' Sales Office: in the Continental U.S.,
except for California, [phone]; in California, (800) 322-
6103.
The packing instructions tell you how to repack the components,
should you ever move or (perish the thought) have to return a
component for repair. As with any complex machinery# the
components of a computer system must be carefully packed (and
well insured) before shipping.
BEFORE you remove your system from its shipping container,
inspect it for shipping damage or mishandling (bent corners,
scarred sides, etc.). If there is damage, immediately file a
report with the carrier. Do not remove the component if there is
agy evidence of damage.
Next remove the equipment from the carton and check it
thoroughly. Again, if any damage is evident, contact Lobo and
the carrier immediately. When you remove each component, shake
it lightly. If it rattles, it probably has been damaged in
shipment.
If the system appears to be in good condition, carefully place it
in an area large enough to hold all the components of your
system. CAUTION: because they are ruggedly constructed, Lobo
systems are quite heavy. Be careful.
VERSION 1.1

HARDWARE SETUP UNPACKING
PACKING REMINDER
FILLER. STYROFOAM PELLETS -
DOCUMENTATION I SOFTWARE
MAILING ADDRESS
w
CARDBOARD BRACE
AC POWER CORD
END BLOCKS
PLASTIC BAG
MAX-80
CARTON
F
PACKING LIST
RETURN ADDRESS-
I
RMA NUMBER
(NOTE: The RMA number is necessary if any
component is to be returned to Lobo systems.)
LOR0 SYSTEMS VERSION
1.1

HARDWARE SETUP
LOB0 SYSTEMS
UNPACKING
VERSION 1.1

HARDWARE SETUP HARDWARE ASSEMBLY
BEFORE YOU START
ASSEMBLY
Be sure you have enough AC power outlets to run the components
(the MAX-80, floppy disk drive(s)t hard disk drive, monitor,
printer, and any other peripherals in your system). Since all of
these units require 115 Volt AC power, we recommend purchasing
a
switched power distribution box (usually a six outlet box will
do). A switched connector eliminates (or at least lessens) the
chore of remembering to turn on all of the separate units. (The
power distribution box can be used because the MAX-80 does not
require the peripherals to
be turned on in any particular order
-- so they might as well all be turned on at once.)
&#'
TYPICAL POPNEW DISTRIBUTION BOX:
LOB0 SYSTEMS
HS-5 VERSION 1.1

HARDWARE SETUP HARDWARE ASSEMBLY
There should be no problems with current loading of the AC
electrical system, as the requirements of each of these
components should be quite low. The Max-80 draws about 1/4 Amp,
the video monitor slightly more, a pair of 8 inch floppy disk
drives draw about 1 Amp, a hard disk is usually in the same
ballpark (check the specifications of the particular drive you're
using), and the only serious drain is associated with the printer
(again* check the specs). Consequently, the total current
required by the system should only be critical on already heavily
loaded circuits. If you are having problems, the only solution
is to take some of the other equipment off the line.
You might also have problems with power surges and brownouts
(power dropouts) on your AC lines. Power surges can damage any
electronic equipment, so if you have found such problems in the
past, make sure that you have a surge suppressor (available at
most electronics stores) on the line. Brownouts on the line will
not damage the equipment, but can cause your MAX-80 system to
_
reset -- i.e., you. lose everything you have been working on since
the last time you stored your work on disk! If such brownouts
are a problem with that power line, you should either try to find
a cleaner line (perhaps without your electric dryer, refrigera-
tort etc. on it), or should invest in an "uninterruptable power
supply" (UPS). The chief advantage of an UPS, by the way, is
that the power can go out altogether and it still allows you
enough time to save what you are doing before the system shuts
down.
CAUTION: FOR SAFETY, WHILE YOU ARE CONNECTING ANY PART OF YOUR
SYSTEM, MAKE SURE THE ENTIRE SYSTEM IS TURNED OFF AND EVERYTHING
IS UNPLUGGED FROM THE AC POWER LINE. DO NOT PLUG IN ANY OF THE
COMPONENTS UNTIL THE ENTIRE SYSTEM IS ASSEMBLED AND YOU HAVE
ASSURED (see the instructions below) THAT IT IS ASSEMBLED
CORRECTLY.
Before you set up your hardware, note that the MAX-80 requires at
least one floppy disk drive and a video monitor. The drive is
necessary because the MAX-80's operating system must be loaded
from floppy disk (which is included with your MAX-80)
-- that is, .
the operating system is not already implanted in the hardware of
the machine. If you bought a complete package from Lobo, then
you purchased drives that have been configured for use with the
MAX-80.
LOB0 SYSTEMS VERSION 1.1

HARDWARE SETUP
MAX-80 BACK PANEL
HARDWARE ASSEMBLY
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BACK PANEL
The connections on the back panel are all clearly labeled, as are
the Number 1 pins of each connector. The connections are
* Power In: connector for the MAX-80's 115 VAC cord
* Parallel Printer: parallel connector for a Centronics-
type printer
* Winchester Interface: parallel connector for a Lobo-
compatible hard disk drive that has a controller
* Video Out: RCA/phono jack for a video monitor
* Serial A and Serial B: RS-232C connector for a serial
printer, modem, etc.
* 8 Inch Floppy: 50 pin parallel connector for one to
four Lobo compatible 8 inch floppy disk drives (con-
troller is in the MAX-80)
* 5-1/4 Inch Floppy: 34 pin parallel connector for one to
four Lobo compatible 5-1/4 inch floppy disk drives
(controller is in the MAX-80)
The equipment can be connected in any order, as long as the power
is off. For safety's sake, do not plug in the power cord until
all of your peripherals have been connected.
You may connect up to four 5-1/4 inch drives, four 8 inch drives,
and a hard disk drive at any one time. The CP/M software
adjustments necessary for the various configurations are
described in the manual CP/M Startup.
LOB0 SYSTEMS HS-7 VERSION
1.1

HARDWARE SETUP HARDWARE ASSEMBLY
LOB0 SYSTEMS VERSION
1.1

HARDWARE SETUP DRIVE INSTALLATION
DRIVE
INSTALLATION
MINIFLOPPY (5-1/4 INCH) DISK DRIVES
One or Two Lobo Dual Minifloppy Systems
The MAX-80 directly supports Lobo's single and dual minifloppy
drive systems.
The first dual drive unit plugs directly into the MAX-80's 5 inch
floppy connector. A (polarizing) key i-n the connector prevent-s
the cable from being connected upside down. This dual drive
includes a cable terminator resistor.
If you order a second dual drive with your MAX-80, or specify
that the drives you order will be your third and forth drives,
then your second drive configuration will have a special tongue
connector. This connector taps into the middle of the first
drive's cable. The tongue connector may not have a polarizing
key, so be sure that the cable's dark colored edges are situated
close together. This dual drive does not have a cable terminator
resistor.
A two-position switch sits just above the MAX-80 minifloppy
connector (inside the MAX-80 itself). Make sure this switch is
switched AWAY from the numeric keypad.
LOB0 SYSTEMS VERSION
1.1

HARDWARE SETUP DRIVE INSTALLATION
Lobo Minifloppy Drives Originally Installed on TRS-80s
-
In these drives the selection request depends only on which cable
connector the drive is plugged into. The fourth drive responds
to Pin
32 of the cable for drive selection. Unfortunately, Pin
32 goes to the standard side selection line -- so double sided
drives are not supported under this scheme. If you now have
double sided Lobo drives, be sure to follow the instructions in
the next subsection.
One and only one of the drives must have an internal electrical
terminator resistor. TRS-80 compatible drives from Lobo Systems
have a sticker saying "NO T.R." if they are NOT terminated. If
you need to check, some typical terminator locations are shown in
the figure on the next page.
A TRS-80 compatible cable also is unique. It has specific pins
removed from each of the connectors. Plug the computer end of
this cable (the connector furthest from the other four) into the
MAX-80. The edge with the dark stripe goes closest to the Pin 1
label on the back panel of the MAX-80. The next connector on the
cable plugs into Drive 1 (which may or not be Drive A: in MAX-80
CP/M). The dark stripe on the cable must be closest to the slot
in the drive connector. The following connectors are for Drives
2, 3 and 4, in succession. The last drive on the cable should be
the one with the terminator resistor.
If you are not installing four drives, leave the unused
connectors at the end
of the cable free. If you are installing
four drives, make sure that the two position selector switch that
sits just above the MAX-80 connector (inside the MAX-80 itself)
is moved TOWARD the numeric keypad, or the fourth drive won't
work.
LOB0 SYSTEMS VERSION 1.1

HARDWARE SETUP DRIVE INSTALLATION
LOB0 SYSTEMS VERSION
1.1

HARDWARE SETUP DRIVE INSTALLATION
Lobo Minifloppy Drives OQqinally Intended for Other Systems
Use a straight through cable (a cable with all its pins intact)
and configure each drive as a different drive number. To comply
with this scheme, Drive 1 on the cable must respond to Pin 10 for
drive selection. Drives
2, 3 and 4 must respond to Pins 12, 14,
and 06 (NOT 16, as they would for a TRS-801, respectively. If a
drive is double sided, it must respond to Pin 32 for side select.
Each drive must be opened up and checked to be sure that it has a
unique drive select number. Locate the DIP SHUNT (which looks
like an integrated circuit, but which has several metal strips
across its top) and verify either that one and only one of the
drive selection strips is intact or that the rest of the lines
are somehow disconnected. (Perhaps the legs are bent up or
broken off.) Adjust (break the strips or bend the legs) each
drive's dip shunt so that it has a unique drive select number.
Also check the dip shunt to be sure that MH (or
HM) is intact,
and that the other head load request pins (MX, MS, HS, HL, etc.)
are broken away. Typical.dip shunt locations are shown above.
If a Lobo drive was originally intended for a TRS-80, it has a
piece of wire attaching Pin 32 of the drive's connector to some
other place in the drive. Remove this wire.
Again, one and only one of the drives must have a terminator
resistor, and Lobo attaches the label "NO T.R." to its
unterminated drives. You must locate the terminator (a
14 or 16
pin chip plugged into a socket near the dip shunt) within each
drive and remove any extras you may have.
A straight through cable (i.e., no pins removed) can be obtained
from Lobo. You can also use a TRS-80 compatible cable by simply
reversing (plugging in upside down) all five (or however many you
are using) of the connectors. The connector furthest from the
others still goes to the MAX-80. Unless you are reversing a TRS-
80 compatible cable, plug the computer end of the cable in so
that the dark stripe goes nearest the Pin 1 label on the back
panel of the MAX-80.
The figure on the next page shows the connections for the 5 inch
floppy, 8 inch floppy, and expansion bus. Note the locations of
the dark stripes on each cable. Plug the drives into the other
connectors; order does not matter, but make sure that the termi-
nated drive is furthest out on the cable. Orient each connector
so that the dark stripe is closest to the slot in the drive
connector, UNLESS you are reversing a TRS-80 compatible cable.
Make sure that the MAX-80 selector switch (located immediately
above the
5 inch connector) is moved AWAY from the numeric keypad
LOB0 SYSTEMS- HS-12 VERSION 1.1

HARDWARE SETUP
5-114 INCH
FLOPPY DISK DRI
FLOPPY DRlVE AND EXPANSlObl BUS CONNECTIONS
WARNING: IF THE CABLE TO A DRIVE UNIT IS UPSIDE DOWN, ITS DRIVES
WILL TURN ON AND ERASE ITS DISKETTES. TEST FOR THIS CONDITION BE-
FORE INSERTING DISKETTES CONTAINING VALUABLE DATA. INSERT BLANK
DISKETTES AND TURN ON THE DRIVES, BUT LEAVE THE MAX-80 OFF. IF
BOTH LIGHTS COME ON AND STAY ON, YOU'VE MISCONNECTED THE CABLE.
8 INCH FLOPPY DISK DRIVES
Drives Purchased with the MAX-80
The MAX-80 directly supports one or two Lobo dual 8 inch floppy
drives.
The first dual drive system connects to the MAX-80's 8 inch
floppy connector through its
50 line ribbon cable. The edge with
the dark stripe goes closest to the Pin
1 label on the back panel
of the MAX-80. (See the figure above.) A (polarizing) key in
the connector should prevent the cable from being connected
upside down. This first dual drive unit will include a terminat-
ing resistor.
If you order a second dual drive with your MAX-80, or specify
that the drives you order will be your third and forth drives,
then your second drive configuration will have a special tongue
connector. This connector taps into the middle of the first
drive's cable. The tongue connector may not have
a polarizing
key, so be sure that the cable's dark colored edges are situated
close together. This dual drive does not have a cable terminator
resistor.
LOB0 SYSTEMS HS-13 VERSION 1.1

HARDWARE SETUP DRIVE INSTALLATION
Lob0 Drives That Were Not lntended for the MAX-80
-----
If you have purchased Lobo 8 inch floppy drives that were not
packaged specifically for the MAX-80, you probably will have to
jumper these drives before the setup instructions above can be
followed. This jumpering involves disassembling the drive
cabinet and moving pin jumper plugs on the drive's printed
circuit board.
BEFORE PROCEEDING, MAKE SURE YOU DISCONNECT ALL AC POWER TO THE
DRIVES.
Reconfiguring Single Sided 8 Inch Lobo Drives
Do the following to all single sided 8 inch Lobo drives:
-- Install jumpers AIBCX~Z~HL~~OOand T1.
-- Place the L jumper (if your drive has one) to the -5
position, parallel to the drive's side. To avoid
confusion, REMOVE ALL OTHER JUMPERS!
If you have a single 8 inch drive:
-- Add jumpers DSltT3,T4,T5 and T6.
If you have a dual 8 inch drive system:
-- On Drive 1, add DS1. Remove T3, T4, T5 and T6.
-- On Drive 2, add DS2t T3, T4r T5 and T6.
If you have a three drive system:
-- On Drive 1, add DS1. Remove T3, T4, T5 and T6.
-- On Drive 2, add DS2. Remove T3, T4, T5 and T6.
-- On Drive 3, add DS3, T3r T4r T5 and T6.
If you have a four drive system:
-- On Drive 1, add DSl. Remove T3r T4t T5 and T6.
-- On Drive 2, add DS2. Remove T3, T4, T5 and T6.
-- On Drive 3, add DS3. Remove T3r T4, T5 and T6.
-- On Drive 4, add DS4, T3, T4r T5 and T6.
LOB0 SYSTEMS HS-14 VERSION
1.1

HARDWARE SETUP DRIVE INSTALLATION
Reconfiguring Double Sided 8 Inch Lobo Drives
The 150 Ohm resistor network mentioned below is a device that
looks like an integrated circuit, is installed into a socket, and
probably reads "Beckman" on top.
.
Do the following to all double sided 8 inch Lobo drives:
-- Install jumpers RS, FS, IT, 850, S2, 2St -5, M and AF.
Some drives do not have some of these jumpers. To
avoid confusionr REMOVE ALL OTHER JUMPERS.
-- Add jumper IW. If your IW position has three pins,
position the jumper so it connects to the large, heavy
circuit foil (ground).
-- Install a new Dual Inline Package (DIP) shunt, so all
eight jumpers are intact (21 HL, A, B, XI I, R and S).
If you have a single 8 inch drive:
-- Add DSl and the 150 Ohm resistor network.
If you have a dual 8 inch drive system:
-- On Drive 1, install DSl. Remove the 150 Ohm resistor
network.
-- On Drive 21 install DS2 and a 150 Ohm resistor network.
If you have a three drive system:
-- On Drive 1, install DS1. Remove the 150 Ohm resistor
network.
-- On Drive 2, install DS2. Remove the 150 Ohm resistor
network.
-- On Drive 3, install DS3 and a 150 Ohm resistor network.
If you have a four drive system:
-- On Drive 1, install DS1. Remove the 150 Ohm resistor.
-- On Drive 2, install DS2. Remove the 150 Ohm resistor.
-- On Drive 3, install DS3. Remove the 150 Ohm resistor.
-- On Drive 4, install DS4 and the 150 Ohm resistor network.
LOB0 SYSTEMS VERSION 1.1

HARDWARE SETUP
DRIVE INSTALLATION
Reauirements fo~Interfacinq Other Drives
Note that, if you are installing non-Lobo drives, the interfacing
is entirely your responsibility. The precise pinout and timing
data for the
MAX-80 are given in the Technical Reference Manual.
The list below is a quick summary of these requirements. The
requirements of your drives must be obtained from your drive
supplier.
-- when Drive Select (DSn) is asserted, Drive n is selec-
ted, its activity light is on, its head is loaded, its
head positioner is energized, and its door is locked.
-- TWO-headed drives respond to the HEAD0 signal for head
selection.
-- The drive should reduce its write current in response
to LOWI.
-- The drive should return only one index pulse per
diskette revolution.
I
-- The drive returns two-sided status when a two sided
diskette is inserted.
-- The -5 -15 jumper should be set to match the power
supply.
LOB0 SYSTEMS VERSION
1.1