27 Sep
2001
27 Sep
'01
9:26 p.m.
I checked
again. The connectors on the VAX 4000/500 are identical to
SCSI connectors.
But the wiring to the ribbon cable is different. DSSI uses a
1:1
mapping of pin numbers. The HD50 connector for SCSI is wired this way
to the ribbon cable:
HD50 ribbon
1 1
2 25
3 3
4 26
5 5
6 27
... ... 
28 Sep
28 Sep
3:03 a.m.
On 28 Sep, Eric Dittman wrote:
Yes, but if the connectors on both ends are the same I
would be
able to use a SCSI cable to go from the 4000 to the HSD05.
Yes. But SCSI cables are
often twisted pair (pins 1+25, 2+26, 3+27,
...) so depending on the DSSI pinout it may be possible that different
DSSI signals go on the same twisted pair. This can lead to
interference if the cables are long.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
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