HP 30242 Manual

HP 3000 Computer Systems
UP 30242 LAN/3000 Link
Local Area Network Interface Controller
(LANIC)
Installation and Service
Manual
r,;;. HEWLETT
a:~ PACKARD
HEWLETT-PACKARD COMPANY
Roseville Networks Division
8000 Foothills Boulevard
Roseville, California
95678
Update 1 (Jul~T 1986)
Manual Part No. 30242-90001
E0285
Printed in U.S.A
February
1985

11
NOTICE
The information contained in this document is subject to change without notice.
HEWLETT-PACKARD MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS
MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall
not be liable for errors contained herein or for incidental or consequential damages in connection
with the furnishing, performance or use of this material.
This document contains proprietary information which is protected by copyright. All rights are
reserved. No part of this document may be photocopied, reproduced or translated to another
language without the prior written consent of Hewlett-Packard Company.
Copyright © 1985, 1986 by HEWLETT-PACKARD COMPANY

PRINTING HISTORY
The Printing History below identifies the Edition of this Manual and any Updates that are included.
PeriodicallY,
update packages are distributed which contain replacement pages to be merged into the
manual, including an updated copy of this Printing History page. Also, the update may contain write-in
instructions.
Each reprinting of this manual will incorporate all past updates; however, no new information will be
added. Thus,
the reprinted copy will be identical in content to prior printings of the same edition with
the user-inserted update info~mation. New editions of this manual will contain new information, as well
as updates.
30242-90001
First Edition
Update 1
February 1985
... July 1986
111

SAFETY CONSIDERATIONS ]
SAFETY SYMBOLS
Instruction manual symbol: the product
will be
marked with this symbol when it is
necessary for
the user to refer to the
instruction manual in order to protect the
product against damage.
GENERAL -This product
documentation must be
familiarization
with safety
instructions before operation.
and related
reviewed
for
markings and
r CAUTION I The CAUTION sign
denotes ahazard.
It calls
attention to an operating
procedure, practice,
or the
like, which, if not correctly
performed or adhered to,
could result in damage to or
destruction of
part or all of
the product. Do not proceed
beyond aCAUTION sign
until
the indica ted condibons are
fully understood and met.
I CAUTION]
ST A TIC SENSITIVE DEVICES
WARNING,
Indicates hazardous voltages.
Indicates
earth (ground) terminal
(sometimes used in manual to indicate
circuit common connected to grounded
chassis).
The WARNING sign
denotes a
hazard. It calls
attention to aprocedure,
practice,
or the like, which, if
not correctly performed or
adhered to, could result in
injury. Do not proceed
beyond a
",7 ARNING sign
until the indicated conditions
are fully understood and Inet.
When
any two materials make contact,
their surfaces are crushed
on the atomic
level
and electrons pass back and forth
between the objects. On separation, one
surface comes away
with excess electrons
(negatively charged) while the
other is
electron deficient (positively charged). The
level
of charge that is developed depends on
the type
of material. Insulators can easily
build
up charges in excess of 20,000 volts.
Aperson working at abench or walking
across afloor
can build up acharge of
many thousands
of volts. The amount of
static voltage developed depends on the
rate of generation of the charge and the
capacitance of the body holding the charge.
If
the discharge happens to go through a
semiconductor device
and the transient
current pulse is not effectively diverted by
protection circuitry,
the resulting current
flow through the device can raise the
temperature of internal junctions to their
melting points. MOS structures are also
susceptible to dielectric damage due
to high
fields.
Feb 85
v

Feb 85
vi
The resulting damage can range from
complete destruction to latent degradation.
Small geometry semiconductor devices are
especially susceptible to damage by static
discharge.
The LANIC card is shipped in a
transparent static shielding bag. The card
should be kept in this bag at all times until
it is installed in the system. Save this bag
for storing or transporting the card. When
installing
the card in the system, do not
touch any components. Hold the card by
its edges.
WAR,NING
SAFETY EARTH GROUND - The
computer on which this product is installed
is a
safety class Iproduct and is provided
with a protective earthing terminal. An
uninterruptible safety ground must be
provided f
rom the main source to the
product input wiring terminals, power cord,
or supplied power cord set. Whenever it is
likely that the protection has been
impaired,
or before the power cord is
removed from the wall receptacle, the AUI
cable connector
must be removed from the
junction panel and insulated from exposed
conductive surfaces.
WARNING
At infrequent intervals, exposed metal
surfaces of the AUI cable may be subject
to transient hazardous voltages due to·
strong electrical disturbances (such as
lightning or disturbances in the electrical
utilities power grid) in the area
surrounding the network to which this
product is connected. These surfaces
should be handled with caution when the
AUI cable is not connected to aproperly
grounded DP
3000 Computer System.
SERVICING
WARNING
Any servicing, adjustment, maintenance, or
repair of assenlblies within the DP 3000
ca binet must be performed only by
qualified personnel.
WARNING
This product is not designed for
attachment to a network serving an area
which contains multiple unconnected
power system
safety grounds. Before
installing this product, verify that all of
the power system safety grounds are
securely interconnected in the area served
by
the local network.
WARNING
Do not connect this product to an
ungrounded· network coaxial cable.

CONTENTS
Section 1
GENERAL INFORMATION
General Description 1-1
Equipment Supplied 1- 3
System
Interface 1-4
Link Address 1- 5
Specifications......................................................................................... 1- 5
Section 2
INSTALLATION
Current Requirements 2-1
Channel Address Switch 2-1
Cables 2-3
Installing the LANIC 2- 4
Start Up ~ 2-6
Reshipmen t. , , " : 2- 6
Section 3
PRINCIPLES OF OPERATION
LAN Interface Controller (LANIC) ~ 3-1
Host to LANIC Communication 3-1
LANIC MPU and Firmware , 3-3
Local Communications Controller 3- 3
Direct Memory Access 3- 3
Firmware Download and Configuration 3- 3
Firmware Download 3-3
Setting Station Address 3- 3
Queue Initialization 3-4
Transmit Operation 3-4
Types of Packets Transmitted 3-4
Transmit Buffer Management. 3-4
Queuing of Transmit Buffers :::' 3-4
Transmit Operation Example 3-4
Receive Operation 3-4
Types of Packets Received 3-4
Receive Buffer Management 3- 5
Queuing of Received Packets 3- 5
Receiver Blind Spots 3- 5
Receive Operation Example 3- 5
Error Management ,............................... 3- 5
Self-Test Operation 3-6
System In terru pt. .................................... ..................................... 3- 6
Feb 85
vii

CONTENTS (continued)
SINTR 0 Self-Test In terru pt. " 3- 6
SINTRI LANIC Interrupt. 3-6
Interactive Command Completion 3-7
Interactive Comnland Acknowledgement. 3-7
Batch Command Completion 3-8
Fatal Error Response ,. 3-8
LANIC Resets , 3-8
Power-On Reset 3-9
Hard Reset. 3-9
Soft Reset 3-9
Z-80 Reset. , 3-10
Power-Fail Warn 3-10
Self-Test 3 -1 0
Manually Initiated Self-Test 3-10
Remotely Initiated Self-Test. 3 -1 0
Idle Self -Test ,3 -1 0
Visual Indicators · , , 3 -10
Attachment Unit Interface (AU!) 3-10
MAU Power Control Circuit. 3-12
LEDs 3-12
DO LED Pair ' 3-15
CL LED Pair 3-16
CR LED Pair 3-16
H through Nand *LEDs ,3- 16
TX, RX, MN, DL, RO, Q, and IT LEDs 3-16
Medium Attachment'Unit (MAU) 3-18
Receiver ,3- 18
Transmitter 3-18
Collision Detection 3-18
Jabber Fault Detection 3-20
Section 4
MAINTENANCE
Repair Philosophy 4-1
Self-Test 4-1
Appendix A
CONfIGURATION INFORMATION
Configuration Dialog A-I
Feb 85
viii

_GE_N_E_R_A_L_IN_F_O_R_M_A_T_IO_N ---'I~
This manual presents installation and service instructions for the HP 30242A LAN/3000 Link Local Area
Network Interface Controller. This section contains general information covering the HP 30242A
LAN/3000 link product, and includes adescription and specifications.
GENERAL DESCRIPTION
The HP 30242A LAN/3000 link is an implementation of the IEEE 802.2 and IEEE 802.3 Local Area
Network (LAN) standards and is used in HP 3000 computer systems. The HP 30242A allows the !:lP
3000 to communicate with other HP 3000s over an IEEE 802.3, O. 4-inch baseband Local Area Network
(LAN).
The IEEE
802.3 Local Area Networks (LANs) consist of three major elements: acoaxial cable transmission
medium, units
to access this medium (Medium Attachment Units, or MAUs), and controllers. For the
HP 30242A, the controller is the Local Area Network Interface Controller (LANIC).
Afitting, called atap, pierces
the coaxial cable and provides aconnection from the cable to the Medium
Attachment Unit (MAU). An Attachment Unit Interface (AUI) cable connects the MAU to the LAN
Interface Controller (LANIC). The LANIC, in addition to controlling the other LAN elements, functions
as
the interface from the Local Area Network to the computer system. Atypical Local Area Network is
shown in figure 1-1. Each host computer system, including LANIC, AUI, tap, and MAU is called anode
on the Local Area Network. The LANIC, AU I, tap, and MAU are all part of the HP 30242A LAN/3000
link.
The HP
30242A LAN/3000 link is available for use with the HP 3000 Series 39, 40, and 42; and the HP
3000 Series 44, 48 64, and 68. The LANIC, MAU, and AUI cable are the same for all HP 3000 Series;
however, two
different LANIC cables are offered (see the paragraph "Equipment Supplied").
The
LAN/3000 link functions as an intelligent Direct Memory Access (DMA) channel which
communicates
with the host system via the system I/O backplane. Local intelligent control is provided by
amicroprocessor
and firmware on the LAN Interface Controller (LANIC). An 8-bit Z-80B
microprocessor (MPU) on the LANIC handles all the LAN/3000-to-host communication and performs
many link-level operations independently of the host. Atype 82586 Local Communications Controller
(LCC)
on the LANIC performs high-speed serial operations, packet address checking, network contention
control, packet formatting, and Cyclic Redundancy Check (CRC) generation and checking. The LCC is
controlled by the Z-80B through local (card resident) memory.
Feb
8S
1-1

General Information
HP 3000
r--~----i lANle
AUf CABLE
AUI CABLE
HP JOOO
50-OHM
TERMINATOR
50-OHM
TERMINATOR
AUf CABLE
""------I lANle
COAXIAL CABLE
COAXIAL CABLE
AUI CABLE
HP3000
HP 3000
Figure 1-1. Typical Local Area Network (LAN)
Feb 8S
1-2

General Information
The Medium Attachment Unit
(MAU) connects the coaxial cable to the LANIC, through atap and 3rn
Attachment Unit Interface (AUI) cable. The MAU has three major functions:
•Receive data from the coaxial cable and
pass it along to the LANIC controller.
•Transmitdata from the LANIC controller onto the coaxial cable.
•Detect collisions on the coaxial cable, and report the condition to
the LANIC.
In addition, the
MAU performs various housekeeping and support functions. These functions are covered
in Section.
3, Principles of Operation.
Equipment Supplied
Standard equipment supplied with the HP 30242A is listed below:
Standard Equipment
Medium Attachment Unit Asse~bly •.••........• ~ •.... 30241-60101
Coaxial Cable Tap Kit · 0362.,..0819
6-meter AUI Cable •..•......•.•....•.....•.....••.• HP 92254A
(InclUdes· 6 Wallplate/Cable Labels 30241-80004)
(InclUdes 6 Protector Labels •.••......•..•••..•... 30241-80003)
LAN/3000 Installation and Service Manual •......•.• 30242-90001
In addition) one of the following options (depending on the HP 3000 type) adds the following equipment:
Option 300 for theHP 3000 Series 39, 40, and 42
Series 4X/6X LAN Interface Controller (LANIC card) 30242-60001
Series 39/40/42 LANIC Internal Cable ...••..•.....• 30241-60002
Option 400 for the HP 3000 Series 44 and 48
Series 4X/6X LAN Interface Controller (LANIC card) 30242-60001
Series 44/48 LANIC Internal Cable ••..•.•...•.••.•• 30241-60003
Option 500 for the HP3000 Series 64 and 68
Series 4X/6X LAN Interface Controller (LANIC card) 30242-60001
Series 64/68 LAMIC Internal Cable .•.•.•.•••••••..• 30241-60003
Feb 85
1-3

General Information
Option 241 is specified if the MAU and AUI cable are not desired. Option 241 deletes the following
standard equipment:
Option 241
Deletes
Med ium Attachment Unit Assembly ....•.••..•........ 30241-60101
Coaxial Cable Tap Kit .....••..........•....•...... 0362-0819
6 -Mete r AUI Cable ••........•..........•........... HP 92254A
(Including 6 Wallplate/Cable Labels •..........• ~ .. 30241-80004)
(InclUding 6 Protector Labels .........•...... ~/ ... 30241-80003)
System Interface
As noted previously, the LAN/3000 link interfaces to the host computer system through the LAN
Interface Controller (LANIC). The LANIC functions as an I/O channel and fits into the backplane of HP
3000 Series 39, 40, 42,44, 48,64, and 68 computers.
Figure 1-2 shows how the LANIC connects to aSeries 39, 40, 42, 44, or 48 computer system. The CPU,
Memory, Asynchronous
Data Communications Controller (ADCC) or Advanced Terminal Processor (ATP),
General Input/Output Controller (GIC), Intelligent Network Processor (lNP), andLANIC all physically fit
into the backplane (the backplane is called the Intermodule Bus (1MB)).
AUI
Figure 1-2. HP 3000 Series 39 through 48 System Architecture
The architecture for the Series 64 and 68 computers is significantly different than the other HP 3000
series, as shown in figure 1- 3. The CPU and memory fit into the Central System Bus (CSB), and one or
more IMBs connect to the CSB via Common Bus Interfaces (CBIs) and 1MB Interfaces (IMBls). I/O DMA
operations do not go directly to memory, but are handled by the 1MB!.
Feb 85
1-4

General Information
AUI
CENTRAL.. SYSTEM BUS
Figure 1- 3. HP 3000 Series 64 and 68 System Architecture
Link Address
The last 6hex digits of the link level address for the LANIC are indicated on the board stiffener to the
left of the channel address switch (CHAN ADDR) on alabel titled "Station Address". The full address is
08
00 09 XX XX XX, where XX XX XX represents the value on the label.
SPECIFICA TIONS
Table 1-1 lists the specifications of the HP 30242A LAN/3000 link.
Feb 85
1-5

General Information
Table 1-1. Specifications
FEATURES
Compatible with IEEE 802.3 Standard for access to 0.4-inch
diameter baseband coaxial cable
Carrier-Sense Multiple Access with Collision Detection (CSMA/CD)
protocol control~ network~ccess using no mastern6de
On-board node self-test that checks the operation of the node
hardware
including the AUI and MAU
Every node on the network cable is accessible by any other node
on the network wi th no store and forward
10 megabit~per-second hardHate data transfer rate
Each SOO-meter cable segment supports up to 100 nodes
Nodes
may be attached or removed while network is active
VLSI implementation for reliability and lower cost
Microprocessor off-loads host computer and gathers network
statistics
ELECTRICAL CHARACTERISTICS
Data Rate:
Transmitted in bursts of 10 Mbits/sec
Maximum Coaxial Cable Length:
500
meters for one segment
Maximum Distance from Node to Network Trunk:
48 meters maximum for external AUI cable
Required Distance B~tween Taps on Coaxial Cable Trunk:
Each MAU with its cable tap must be located on the coaxial cable
at a position that is an exact multiple of 2.5 meters from the
.end of the cable. The coaxial cable available from HP is marked
every 2.5 meters to show whete MAUs may connect.
Feb 85
1-6

Table 1-1. Specifications (Continued)
LANIC at AUI Connector:
AUI signalling conforms to IEEE 802.3
CO not driven
VP +12V +/-6% @0.5A; overcurrent protected @1.2A maximum
Interframe spacing = 9.6 usec minimum
MAU at AUI Connector:
AUI signalling conforms to IEEE 802.3
CO terminated but unused
Jabber is reset by VP shutdown only
Operating voltage: 9.5V to 15.75V at 460mA maximum
MAU at Coaxial Cable:
Coax signalling compatible with IEEE 802.3 recommended
signalling levels
Receiver based collision detection
Will tap any 0.4 inch coaxial cable meeting IEEE 802.3
physical specifications
MAU Coaxial Cable to AUI Cable Isolation:
+/-707V DC, 500VAC RMS, 50/60Hz
Will conduct repetitive surges of up to 4A without damage
(between
the shields)
DC Impedance, Coaxial Shield to AUI Shield: 928K ohms
General Information
Feb 85
1-7

General Information
Table I":'!. Specifications (Continued)
LANIC PHYSICAL CHARACTERISTICS
Size:
Weight:
331 rom long by 285 mm wide by 22.5 mm thick
(13.04 by 11.2 by 0.89 inches)
739 grams (26 ounces)
LANIC POWER REQUIREMENTS
Voltage
+5V +/-0.5V
,+12V +/-0.6V
Cu rrent
4.7A
0.5A
Power
Dissipation
23.5W
6.0W
(with MAU attached)
MAU PHYSICAL CHARACTERISTICS
Size:
Weight:
320 mm long by 95 mm wide by 30 mm thick
(12.25 by 3.75 by 1.25 inches)
0.55 kg (1.2 1bs )
MAU POWER REQUIREMENTS
9.5 to 15.75 volts
0.5 amp max imum
ENVIRONMENTAL SPECIFICATIONS
Complete environmental specifications are contained in the
LAN/3000 Cabling and Installation Guide, part number 30242-90002
Feb 85
1-8

1
-
'----IN_S_T_AL_L_A_T_IO_N ----' [0
This section contains information on installing and verifying proper operation of the LANIC card, part
number 30242-60001. This manual assumes that the coaxial cable medium, tap, and l\1AU have been
installed
and that the AUI cable has been connected to the MAD and has been routed from the MAU to
the host computer system containing the LANIC. Information on installing the MAU and the AUI cable
is contained in the Local Area Network Cabling and Installation Guide, part nwnber 30242-90002.
[ CAUTION I
SOME OF THE COl\lPONENTS USED IN THIS PRODUCT ARE
SUSCEPTIBLE TO DAMAGE BY STATIC DISCHARGE. REFER TO THE
SAFETY CONSIDERATIONS INFORl\lATION AT THE FRONT OF THIS
MANUAL BEFORE HANDLING THE CARD.
CURRENT REQUIREMENTS
The LANIC circuit card obtains its operating voltages from the host computer. The current requirements
of the card are listed in the power requirements entry of table 1-1.
All HP
3000 Computer systems can supply adequate current to accomodate the LANIC card without the
need for any power supply modification. However, it is possible that the +12V supply in the HP 3000
system may be set to alow voltage such that the VP lead on the AUI cable may not provide the minimum
voltage specified by IEEE 802; 3 (+ 11. 28V). If MAU replacement does not correct an apparent MAU
problem, the VP voltage should be checked. This is done by connecting an accurate voltmeter between
the + 12 and GND test points near the LEDs on the LANIC card. This must be done when the MAU is
connected to the LANIC
and MAU power is on (as indicated by the VP LED). MAU power can be turned
on by executing the LANIC self-test. Consult the HP 3 000 CE Handbook for instructions on adjusting
the +12V power on the HP 3000.
CHANNEL ADDRESS SWITCH
For the LANIC card, the channel address is set by aCHAN ADDR rotary switch, SW2, located on the
front edge of the card. See figure 2-1 for the location of SW2. SW2 can be set to any value between 1
and 1 5, however, ensure that no GICs, ADCCs, or SIBs are set to the same channel number. Once you
ha ve set SW2 to avalue, jot the value down. For 3x and 4x systems, this value times 8will be the DRT
number. For
6x systems, the DRT number is computed as follows: (CHAN ADDR x 8) + (1MB x128) =
DRT.
Update 1(July 1986)
2-1

Installa tion
P1.
P2 P3 P4
ABCOEFGH IJKLMN.
Id/815/
XZ...JO f- §;w.....Jw-Jw-J~cr;:::!:QlrO!:::(fl
000000000000000
J1
J2
Feb 85
2-2
Figure 2-1. LANIC Switch and LED Locations

Installation
CABLES
Two cables are used to connect the LANIC to the MAD: an internal LANIC cable and the AUI cable.
The LANIC cable has ahood connector on one end
and afemale IS-pin Dconnector on the other. A
cabling diagram for
the LANIC cable is shown in figure 2-2. The AUI cable uses amale IS-pin D
connector
on one end and afemale IS-pin Dconnector on the other. Acabling diagram for the AUI
cable
is shown in figure 2-3.
P2
3D-PIN HOOD CONNECTOR
Pl
15-PIN D CONNECTOR
BLACK
BROWN
DRAIN WIRE
BLUE
ORANGE
FRAME GROUND
RED
WHITE
GREEN
YELLOW
Cl-A ORANGE
Cl-B YRLOW
VC (VOLTAGE COMMON) BLACK
DI-A BROWN
DI-B WHITE
VP (VOLTAGE PLUS) RED
DO-A BLUE
DO-8 GREEN
.-..cl--t-- DRAIN WIRE
L...<l--11- BRAID SHIELD
Pl
15-PIN D CONNECTOR
(FEMALE)
Figure 2-2. LANIC Cable Diagram
P2
1S-PIN D CONNECTOR
(~ALE)
BLACK
BROWN
DRAIN WIRE
BLUE
ORANGE
RED VP (VOLTAGE PLUS) RED
WHITE 01-8 WHITE
GREEN 00-8 GREEN
YELLOW CI-8 YELLOW
OVERALL BRAID SHIELD
(CONNECTED THROUGH METALLIZED SHELL)
Figure 2-3. AUI Cable Diagram
VC (VOLTAGE COMMON) BLA.CK
DI-A BROWN
DRAIN WIRE (INTERNAL SHIELD)
DO-A 8LUE
CI-A ORANGE
Feb 8S
2-3

Installa tion
INST ALLING THE LANIC
I CAUTION I
SOME OF THE COMPONENTS USED IN THIS PRODUCT ARE
SUSCEPTIBLE TO DAMAGE
BY STATIC DISCHARGE. REFER TO THE
SAFETY CONSIDERATIONS INFORMATION
AT THE FRONT OF THIS
MANUAL BEFORE HANDLING THE CARD.
Install
the LANIC as follows:
I CAUTION I
ALL SYSTEM POWER MUST BE OFF WHEN INSTALLING OR
REMOVING ANY DEVICE OR CARD IN THE SYSTEM.
1. Before installing the LANIC, perform afull HP 3000 backup.
2. Shut down MPE.
3. Ensure that SW2 is set to the intended channel address. (It may be useful to obtain an IOMAP of all
devices presently on
the system. Refer to the HP 3000 System Operation and Resource Management
Reference Manual, part number 32033 - 90005 for details. )
4. Turn off all system power.
5. Open the door of the I/O section card cage on the back of the HP 3000 Computer system.
6. Insert the LANIC card into a vacant card cage slot as follows:
The LANIC is considered to be ahigh-speed channel and, as such, must be configured so that its
priority is higher than any GIC. Priority is established by the position of I/O cards in the card
cage; the closer to the CPU (or the IMBI in the case of the Series 64 and 68), the higher the
priority.
Series 39, 40, 42. The LANIC can be installed in any slot in the range of 13 through 25. The
adding
of the LANIC card may require the movement of cards in the card cage to give the LANIC
the required relative priority.
Slots
13 and 14 are unique in the Series 39, 40, and 42 in that they are interdependent upon slot
15 in some situations. Specifically, if either aGIC, SIB, or LANIC occupies slot 13 and/or 14, and
if slots 16 through 25 have one or more GICs, SIBs, or LANICs, then aGIC, SIB, or LANIC MUST
be in slot 1 5.
Note that the card in slot 15 need not be identical to the others under consideration. For instance,
if aGIC is in slot 13, and aGIC, SIB, or LANIC is in 16 through 25, then anyone of the three
may be installed in 15.
If ADCCs are installed in 13 and 1 4, as is commonly the case, there are no special considerations
involving slot 15.
Feb 85
2-4