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        - Sun Proprietary/Confidential: Internal Use Only -
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                        FIELD INFORMATION NOTICE
           (For Authorized Distribution by Customer Service)



PRODUCTS AFFECTED:

	Sun Ultra 2 Model 1170
	Sun Ultra 2 Model 2170 (MP version)

FIN #: I0289-1

Create Date: Oct/14/96

Keywords: 

New Flash PROM firmware allows mixing of differing 167MHz UltraSPARC 2

Product Affected: 

Sun Ultra 2 Model 1170
	Sun Ultra 2 Model 2170 (MP version)

Parts Affected: 

501-2942-01 167MHz UltraSPARC 2 CPU Module with CPU Rev. 2.2
	501-2942-02 167MHz UltraSPARC 2 CPU Module with CPU Rev. 4.0

References: 

802-7558-10	Product Note "Sun(TM) Ultra(TM) 2 167 MHz UltraSPARC Modules"
802-3233-13   	Ultra 1 and Ultra 2 System Flash PROM Programming Guide

Issue Description: 

When an UltraSPARC 2, 167MHz CPU module with CPU revision 2.2, and
an UltraSPARC 2, 167MHz CPU module with CPU revision 4.0, are
installed in the same Ultra 2 system having an OpenBoot
firmware version of 3.1.2 or lower, the default CPU speed
reverts to 148MHz.  Instead of the system running at 167Mhz, the system
will run at the lower speed.

This is due to an incompatibility in the system's OpenBoot Firmware,
specifically the incompatibility as to how each version of the
CPU reports its "speed code", a 3-bit number, to the OpenBoot Firmware
through the RISC chip.

Corrective Action: 

Install patchid 104169-03 or higher.

Comments: 

To view which release and version of CPU module is installed, use the
following;

i) From the "ok" prompt, check OpenBoot revision level using the ".version"
   command.  This will display release and version of the CPU Module board.
   
   The patch is required if the system has one 501-2942-01 module AND one
   501-2942-02 module AND the system's OBP release shows this:

	ok .version
	Release 3.1.2 Version 2 created 1996/03/28 17:08
	OBP 3.1.2 1996/03/28 17:08
	POST 3.1.4 1996/04/09 15:23

   The patch is NOT required if the system's OBP release is 3.1.3
   or greater.  The system's OBP release shows this (or a later release
   number than 3.1.3):

	ok .version
	Release 3.1.3 Version 3 created 1996/06/24 18:21
	OBP 3.1.3 1996/06/24 18:21
	POST 3.1.4 4/09/1996 15:23

   Alternately, the OBP version can be detected online under Solaris with
   the following command:
   
   /usr/platform/sun4u/sbin/prtdiag -v | grep OBP
	
ii) To determine the module configuration online, under Solaris 2.x
    without opening the box and looking for part numbers,  use the 
    /usr/platform/sun4u/sbin/prtdiag command and inspect the output.
    The display under the "MASK" column of the CPU module indicates
    the module version number.

    If the system has a 501-2942-01 module, the prtdiag output looks like:

	# ./prtdiag
	System Configuration:  Sun Microsystems  sun4u Sun Ultra 2 UPA/SBus (UltraSPARC 168MHz)
	System clock frequency: 83 MHz
	Memory size: 128 Megabytes
       		CPU Units: Frequency Cache-Size Version
            	A: MHz  MB  Impl. Mask  B: MHz  MB  Impl. Mask
            	----------  ----- ----  ----------  ----- ----
               	   168 0.5   10    2.2                          

    If the system has a 501-2942-02 module, the prtdiag output looks like:

	# ./prtdiag
	System Configuration:  Sun Microsystems  sun4u Sun Ultra 2 UPA/SBus (UltraSPARC 168MHz)
	System clock frequency: 83 MHz
	Memory size: 128 Megabytes
       		CPU Units: Frequency Cache-Size Version
            	A: MHz  MB  Impl. Mask  B: MHz  MB  Impl. Mask
            	----------  ----- ----  ----------  ----- ----
                   168 0.5   10    4.0                   


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