wieland@ea.ecn.purdue.edu (Jeffrey J Wieland) (06/23/89)
We are trying to install one of these on a 3b1, but we are having problems getting some of the cards to work. We have the following configuration: In the internal slots: Slot 1: 2 meg RAM board Slot 2: EIA/RAM Combo Board Slot 3: Expansion Unit Card In the Expansion Unit: Slot 5: Tape Controller Slot 6: EIA/RAM Combo Board Slot 7: EIA/RAM Combo Board (right hand slot, looking at back of unit) None of the EIA/RAM cards have memory installed. The serial ports in the EIA/RAM cards in the Expansion Unit are not recognized by the system software. This must have something to do with how the system identifies the cards to tell what hardware is installed. The manual for the expansion does say that any ram cards must be installed in the internal slots, but we thought that we would be all right since there is no ram installed on these boards. Is it possible to get these cards to work in the expansion unit? By the way, the tape drive controller card works fine. Jeff Wieland wieland@ecn.purdue.edu
jcm@mtunb.ATT.COM (was-John McMillan) (06/26/89)
In article <12821@ea.ecn.purdue.edu> wieland@ea.ecn.purdue.edu (Jeffrey J Wieland) writes: >We are trying to install one of these on a 3b1, but we are having >problems getting some of the cards to work. We have the following >configuration: ... > In the Expansion Unit: > >Slot 5: Tape Controller >Slot 6: EIA/RAM Combo Board >Slot 7: EIA/RAM Combo Board (right hand slot, looking at back of unit) > >None of the EIA/RAM cards have memory installed. The serial ports in >the EIA/RAM cards in the Expansion Unit are not recognized by the >system software. This must have something to do with how the system >identifies the cards to tell what hardware is installed. The manual >for the expansion does say that any ram cards must be installed in >the internal slots, but we thought that we would be all right since >there is no ram installed on these boards. Is it possible to get >these cards to work in the expansion unit? By the way, the tape >drive controller card works fine. Much to my unpleasant surprise... a co-worker informed me that: The EIA/RAM cards fail in the expansion box. He'd observed this and reported it as a bug when the expansion box was being tested. C.T. [who did the 3B1 chassis] did the EIA/RAM card engineering, BTW. My presumption is that the EIA/RAM card requires the External Memory Select line to be driven in order to do on-board decoding, and that the Expansion box doesn't drive this line. Best fix would be to get the EIA-ONLY boards. Someone out there may be able to advise a hardware fix.... I only do software, if that. Last week's E-mail to you was bounced.... Sorry for the delay. john mcmillan -- att!mtunb!jcm -- Speaking for himself, only.
lenny@alps.UUCP (Lenny Tropiano) (06/27/89)
In article <12821@ea.ecn.purdue.edu> wieland@ea.ecn.purdue.edu (Jeffrey J Wieland) writes: >We are trying to install one of these on a 3b1, but we are having >problems getting some of the cards to work. We have the following >configuration: > ... > In the Expansion Unit: > >Slot 5: Tape Controller >Slot 6: EIA/RAM Combo Board ^^^^^^^ >Slot 7: EIA/RAM Combo Board (right hand slot, looking at back of unit) ^^^^^^^ > >None of the EIA/RAM cards have memory installed. The serial ports in >the EIA/RAM cards in the Expansion Unit are not recognized by the ... We had this same problem arise. I'm very unsure why this happens, even with the memory removed from the cards. I replaced both of those cards with others we had in the office with no places for RAM (ie. no sockets at all). The Dual EIA cards then were recognized by the expansion unit. >Is it possible to get these cards to work in the expansion unit? >By the way, the tape drive controller card works fine. ... The fact that your tape controller is working is good. That means the signals are getting to the expansion unit fine. I don't know what the official word from AT&T is, and why they wouldn't work in the expansion unit. -Lenny