PROBLEM:  (CLD ALC-08171, QAR 68751)    (Patch ID: OSF435-131)
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When using a DE504-BA in an AS800 with a second SCSI controller on the
shared PCI bus, the DE504 experiences DMA latency and increases its
buffersize from 128 bytes to 1024 bytes in four steps during heavy load
and finally goes into a store/forward mode. When this happens the device
does a reset and stops working for approximately 2 seconds. During this
time all incoming datagrams and messages are lost.

This patch adds a kernel global variable to the tu driver that specifies
whether store/forward mode should be permanently enabled when the tu driver 
starts. To enable this mode, patch the variable tu_sf_mode using dbx:

# dbx -k /vmunix

(dbx) patch tu_sf_mode=1
1
(dbx) quit
#

PROBLEM:  (QAR 65058, QAR 65259)    (Patch ID: OSF435-199)
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The patch fixes a problem in the tulip driver. The tulip driver needs to
support DC21143-xD Errata V4.0 for ethernet connections. This chip is 
currently being used on Compaq Professional Workstation XP1000 
(as well as several others in the near future).