chris@mimsy.UUCP (Chris Torek) (08/05/87)
We have 4.3BSD running on a VAX 8250. (You might ask how. That is a long story, and the system still needs minor :-) things like ECC detection and better standalone code so it can boot without manual intervention; it is by no means done yet. But it runs.) We discovered that one InterLAN Ethernet board, which worked fine when the machine was a 750, no longer works. A DEC DEUNA works, as does a TU80 tape drive on the same bus, and I am fairly confident that the problem has to do with the differences between a DWBUA Unibus adapter and a DW750 or DW780. (The InterLAN configures properly and `works' but delivers erroneous data, as though it had trouble reaching main memory through the DWBUA.) We have a second 750 that is scheduled to be upgraded to an 8250 immediately, now that the first one is running. It---alas!---has all its disks attached to an Emulex SC41/MS, another foreign controller. Whether it will work on a DWBUA we do not yet know. Now this is under a service contract; if it does not work, we at least have someone to whom to to complain. Complaints alone, however, will not give us a working machine. Even if it does work, I still will wonder at the InterLAN's failure. Hence (at long last) this request: Does anyone Out There know just what the differences are between DWBUA Unibus characteristics and DW750 Unibus characteristics? Or is there available to the general public (i.e., me and/or Emulex and/or CDC) DEC documentation detailing same? -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690) Domain: chris@mimsy.umd.edu Path: seismo!) sts CT CT
chris@mimsy.UUCP (Chris Torek) (08/07/87)
To answer my own questions:
1) Emulex says the SC41/MS is known to work on DWBUAs.
2) The manual for the DWBUA is EK-DWBUA-TM, and it has an
appendix that mentions why certain things do not work on
the BUA. I am not sure which (if any) of these apply to
InterLAN's NI1010A board.
By the way, if anyone ever needs to set an 8[23][05]0 to boot off
the console RX50 (as I am doing), you need to set the EEPROM boot
device to CS21, not CS20.
--
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
Domain: chris@mimsy.umd.edu Path: seismo!mimsy!chris