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Conference 49.910::kav30

Title:	VAX on VMEbus: KAV30
Notice:	Could have been as fast as 68K but its a VAX!
Moderator:	CSSVMS::KAV30_SUPP

Created:	Thu Apr 18 1991
Last Modified:	Fri Aug 02 1996
Last Successful Update:	Fri Jun 06 1997
Number of topics:	159
Total number of notes:	645

138.0. "P2 Pinout?" by VELENO::MICHIELI (Is IBM DEClining ?) Thu Sep 01 1994 14:59

    Hi all,
    my customer, Alenia, need to know the P2 pinning for KAV-30.
    
    I've take a look into the EICMFG:: KAV30 HW and SW docs and have had a
    browse with the DECW$VIEW (do you remember the 'paperless office').
    
    Before I start to print the whole manual to find out an answer, I'd
    like to post it here: which manual, document describe the customer
    request? (Please post the name.PS file, wherever possible).
    
    Furthermore, I'm aware of the P2 pinout of the AXPvme boards (some SCSI
    and timing pins on A and C rows plus power supply on B) so apologize
    about my ignorance on KAV30. My own question is: is P2 on KAV30
    completely empty? That is no signals on it? Is yes, then this answer
    the customer question, of course.
    
    Best regards,
    	Gabriele MICHIELI - dtn 870-2203

T.R	Title	User	Personal Name	Date	Lines
138.1	P2 is not empty...	EICMFG::KAV30_SUPP		`Thu Sep 01 1994 16:27`	11
	The P2 connector is used for the VSB bus and is NOT empty. The pinning is not described in any KAV30 documentation (as far as we can remember...). It is described in the VME spec - there might also be some DEC documentation elsewhere (not in the KAV30 area) where you could look for it. Basically, 'outer' rows of the connector are used - row 'a' and 'c'; row 'b' is standard VME. Hope this helps... Thomas
138.2	P2: C=STD, are A or B used in KAV30?	VELENO::MICHIELI	Is IBM DEClining ?	`Thu Sep 01 1994 18:49`	11
	Hi Thomas, thnx for replying. Please, let me better understand what you mean. A simple yes/not is OK, of course. The row B is 'VME Standard'. Therefore no problem. The row A and C, the 'outer' one, are customer defined. Then when you say 'The pinning is not described in any KAV30 documentation ' can we assume that ONLY row C is used and A,B are free (NO SIGNALS)? Regards, ~~Gabus~~ PS: Apologise for misleading terminology.
138.3	Row A and C are NOT usable unless for VSB	EICMFG::KAV30_SUPP		`Fri Sep 02 1994 10:36`	13
	Row B is VME, that's standard. The two outer rows A and C are used for the VSB bus which is an option the KAV30 has. This is a subsystem bus which the KAV30 implements, therefore the rows are NOT usaable for anything else. The VSB bus is an integral part of the KAV30 which is NOT removable and can NOT be disabled. Simple answer is: You can only utiliye the rows A and C for VSB bus compatible cards nothing else. Some other boards have for example SCSI comming out of these rows, the KAV30 has VSB. Hope this helps. Julian.
138.4	NO 'free' pins on P2...	EICMFG::KAV30_SUPP		`Fri Sep 02 1994 13:29`	5
	... to make it chrystal clear: NO, you can not use row A and C on P2. Thomas
138.5		VELENO::MICHIELI	Is IBM DEClining ?	`Fri Sep 02 1994 14:39`	5
	... and of course I say A and 'B' instead of A and 'C', meaning the 'outer' rows. Sorry. Thank you everybody again, ~~Gabus~~