12 SCSI CONNECTION ON P2
There is no industry standard connection for SCSI on P2 of VME boards. This
is not so strange, since the SCSI-bus is rarely (or never)
bussed
in the
backplane, it goes normally only out from one board (CPU w/SCSI interface,
or specific SCSI controller 'VME board like DVME-718). If the connection
matches the VBT-325C, then the arrangement shown below can be as used for
SCSI analysis.
VME/P2backplane
VBT-325C
Analyzer
VME board _
with P2 I/O bus
Extended flatcable for
analysis by VBT-325C
Flatcable on
<Top view>
P
2
a/c connector
To l/0
device
Figure A 6. Example of SCSI-connection to VBT-325 on P2 backplane.
The connection of the SCSI bus on the VBT-325C is taken from the Motorola
SCSI I/F board DVME-718, and is chosen since it maps easily on to a 50-lead
flatcable, as done by VMETRO's SCSI cable "VSC-8", see enclosed drawing.
When this is used as shown above, it is the
cable
which creates the "bus"
between the adjacent P2 connectors (on rows a,c).
For CPU boards like Motorola MVME147/167/187 etc., the SCSI connection
on P2 is rather random, since it is intended to go via a "P2 paddle board",
supplied by the CPU board vendor, to convert all the I/O, including Ethernet,
serial etc., to industry standard connectors.
In order to connect a VBT-325C to the SCSI cable in such systems, this
requires that a 64-pin DIN connector is pressed on to the existing 50 lead
flatcable, or that VMETRO's "VSC-3" cable (see enclosed drawing) is used to
extend an existing SCSI cable to allow it to pass the slot where the VBT-325C
is located.
VMETRO
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User's Manual
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Содержание VBAT-PB
Страница 15: ...x i v 1 1 I 1 1 I I i i I I 1 I I 1 I 1 I I ...
Страница 23: ...1VBT 325 Product overview 8 V B T 3 2 5 User s Manual V M E T R O ...
Страница 125: ...8 Trace examples 110 V B T 3 2 5 User s Manual V M E T R O ...
Страница 144: ...9 VBAT PB VME bus anomaly trigger ITP40 I GND VMETRO V B T 3 2 5 User s Manual 1 2 9 ...
Страница 159: ...1 1Jumper settings 144 V B T 3 2 5 User s Manual V M E T R O ...
Страница 181: ...16 Simulator for PC 166 V B T 3 2 5 User s Manual V M E T R O ...