Article View: comp.sys.dec
Article #4102Re: Need help interfacing NCR SCSI device to Vax
From: john
Date: Wed, 12 Jun 1991 08:27
Date: Wed, 12 Jun 1991 08:27
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>> Can anyone out there tell me were I could get a cable that would work,
>> or baring that, the pinouts on the NCR SCSI interface so I could
>> build the proper cable?
>The connector on the NCR thing should be the standard 50-pin Dual in-line
>header connector. You should be able to get a standard adapter cable
>for this, assuming the MV3100 has standard SCSI?
[stuff deleted]
Just for info., there are two distinctly different SCSI interfaces, single-
ended and differential. These are different electrically (voltage levels
essentially), but LOGICALLY are the same.
Make sure your SCSI host is the same (i.e. diff. or single-ended), or you
could a slight funcrional impass (i.e. bang sizzle, sizzle).
Apart from that, there are 3 different connectors, but all have the same
signals. SCSI A-connectros, B and C.
'A' connectors look crude to modern eyes - not very technical I know, but
can't think how to describe them. NCR don't use these anymore.
'B' connectors look like large centronics plugs. NCR PC925/PC386 use these.
'C' connectors are like miniature 'd' connectors. NCR System 3000's use
these.
You can get 'B' to 'C' converter cables - we've got one.
Hope this is of some general use.
--
John A. Oxlade Phone: +44 71 725-8820 Fax: +44 71 725-8374
Group Leader, Email: john.oxlade@London.NCR.UK
DOS and OS/2 Support, SSD
NCR (UK) Ltd., 206 Marylebone Road, LONDON, NW1 6LY, United Kingdom.
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<162@ncrgb.london.ncr.uk>Path:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!mintaka!bloom-beacon!eru!hagbard!sunic!ugle.unit.no!nuug!ncrnorw!ncrdkcp!ncrcom!ncruk!ncrgb!john From: john@ncrgb.london.ncr.uk (john) Newsgroups: comp.sys.dec,comp.os.vms,comp.sys.ncr Subject: Re: Need help interfacing NCR SCSI device to Vax Message-ID: <162@ncrgb.london.ncr.uk> Date: 12 Jun 91 08:27:12 GMT References: <1991Jun6.135312.513@dragon.com> <22327@cbmvax.commodore.com> Organization: NCR UK Software Services, London Lines: 36