The 25525A appears to have first shipped in 1991 with the original
snakes workstations (the 70s), gone of the HP CPL back in 1993,
with its five year support ending in 1998. Looks to have implemented
differential SCSI (narrow differnetial, not wide IIRC).
I forget when the 715/33 went on the CPL. Not sure if that card would
have been supported in that machine (independent of being supported by
the 10.20 OS). The EISA bus in the 715/33 adhered to the EISA
standard, but did not conform to common EISA practice. I seem to
recall it doing something called "cycle stretching" (iirc running the
EISA bus at 25 MHz) and that would make some cards upset. I recall
that we had to make a rev "C" of the EISA Ethernet interface to
support that system.
Digging further (ah the joys of internal search tools :) - it does
seem that the 25525A was listed as a supported I/O card for the
715/33. Of course, that same product support plan lists the "A"
version of the EISA Ethernet LAN card. The trouble with the card was
discovered after launch of the 715/33.
The 715/33 seems to have first shipped not too terribly long before
the 25525A went off the CPL. Not sure how much would have been done at
that point to resolve problems with that card if any were found.
I remember very little about getting EISA peripherals to work. IIRC
the SCSI driver for the differential SCSI was the same driver as the
internal SCSI, but for EISA periphs there needed to be the "EISA"
drivers and the .cfg files installed. Those would typically some with
the card. Not sure if those got bundled with 10.20 or if they
remained on one of the DART CDs.
Wisdom Teeth are impacted, people are affected by the effects of events.
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to raj in cup.hp.com but NOT BOTH...