Ref: 99980134
Title: M1MMON PROMs Revision 02B
Date: 10/26/87

Copyright 3Com Corporation, 1991.  All rights reserved.

Enclosed is a set of M1MMON Rev. 02B PROMs to be installed on the
MCPU board in the Series/1 system.  The set consists of two PROMs
that contain the diagnostics program and the monitor of the MCPU
board.

This release memo describes the procedure for installing the
PROMs on the MCPU board and the new features of the PROMs.

.h1;Installation

Electro-static discharge (ESD) can damage PROMs and other circuit
board components.  Do not remove a circuit board or PROM from its
static protective package prior to installation.  When handling
any circuit board or PROM, avoid touching pins, leads, solder
connections, or gold-plated edges.  Failures resulting from ESD
may not be covered by your warranty.
Use the following instructions to replace the M1MMON Rev. 01K
PROMs with the M1MMON Rev. 02B PROMs on the MCPU board.  Refer to
Figure 1 for information on the component positions.

1.  Locate component positions U46 and U47 on the MCPU board.
Use a PROM-pulling tool to remove the M1MMON PROMs Rev. 01K
from these locations.

2.  Gently push the M1MMON PROM Rev. 02B marked 0-7 into the
socket at location U46.  Be sure that the notch in the PROM
is oriented in the same direction as the corresponding
notch marked on the MCPU board.

3.  Gently push the M1MMON PROM Rev. 02B marked 8-F into the
socket at location U47.  Be sure that the notch in the PROM
is oriented in the same direction as the corresponding
notch marked on the MCPU board.

4.  If the rows of pins of the PROM are too far apart to fit
into the socket, press them closer together by pushing one
row of pins against a flat surface.  To avoid being
invoiced for the new PROMs, return the old PROMs to Bridge
within 30 days.

.h1;Compatibility

All software programs that operate with M1MMON Rev. 01K on the
MCPU board are compatible with M1MMON Rev. 02B.

.h1;New Features

The following features, which were not present in M1MMON Rev. 01K
or earlier, have been implemented in M1MMON Rev. 02B:

1.  When the Series/1 system is powered on or reset, the power-on
messages indicate whether an ITC/M (Intelligent T1 Controller/
Multibus) board is present in the unit.  The messages also show
whether the ITC/M board passed the MultibusTM memory tests.

2.  A new test has been implemented for the TRC/M Token Ring
controller.

3.  M1MMON Rev. 02B supports five boards in the Series/1 system.
Refer to Section 5.2 of the Series/1 Installation Guide for
information on hardware module slot assignment.

Also, refer to Figure 5-1 in the manual for the placement of
boards in the enclosure of a Series/1 product.  The board
occupying slot A or slot B in the cardcage can be connected to
panel 0, and it can be one of the following boards:

+ EC/1
+ EC/2
+ IEC/M
+ IBC/M
+ TRC/M

The shared memory address of this board must start at 100000
(hex).

The boards occupying slots E through H can be an SIO board or any
boards listed above except the TRC/M board.  There should not be
more than four boards excluding the SIO board in a Series/1
product.  The fifth board can be an SIO board.

Table 1 illustrates the connection between the boards in the
cardcage and the connector panels.

       Table 1 Connection Between
      Boards and Connector Panels
 _____________________________________

  Slot Number   Connector Panel Number
       E                  4
       F                  3
       G                  2
       H                  1

Each slot in the cardcage is assigned an interrupt level.
Table 2 shows the interrupt level for each slot.

    Table 2  Interrupt Level
 ______________________________

  Slot Number   Interrupt Level
     A, B              2
       H               4
       G               5
       F               6
       E               7

In a Series/1 system with M1MMON Rev. 02B, memory addresses
of the boards need not be contiguous.  However, the
starting memory address of a board with a higher interrupt
level must be greater than that of a board with a lower
interrupt level.  This allows the system to operate
correctly even after you have removed a board without
changing the shorting plug positions on any other boards
that have higher interrupt levels than the removed one.

Also, no two boards should share the same address space.

4.  The format of the power-on messages has been changed.  The
messages are arranged according to the interrupt levels of
the boards.  The numbers correspond to the numbers of the
connector panels.  Also, the size of the memory of each
board except the SIO boards is shown.

The following is an example of the power-on messages:

 - MCPU Passed M1 MMON rev. 02B 0
 - IBC/M 512KB
 - Passed Station Address
 - 08000200A03F M2 IBCM rev. 00C 1
 - SIO Present MR ASYN 2
 - SIO Passed M0 ASYN rev. 17F 3
 - Not Present 4
 - ITC/M 128KB
 - Present

In this example, the board in slot A is an IBC/M board; the ones
in slots G and H are SIO boards; the one in slot E is an ITC/M
board.

.h1;Documentation

Refer to the following manual for further information on the
Series/1 product:

+ Series/1 Installation Guide (11/86)
.br;Part number: 09-0022-05

If you have any questions, contact an authorized 3Com service
representative for assistance.
