CHAPTER 2
INSTALLATION AND SETUP
2.0 VME / VXI COMPATIBILITY
SWITCHES
The TFP i s designed f o r both
VMEbus and VXIbus compatibility.
Switches SW2-3 and SW2-4 are
used to select the bus protocol. To
select VXIbus compatibility set
SW2-3 and SW2-4 to the
OPEN
or
OFF
position. To select VMEbus
compatibility set SW2-3 and SW2-
4 to the
CLOSED
or
ON
position.
4
1
SWI
31/2
PI
P2
Switch SW2-3 controls the register
b l o c k a d d r e s s i n g w i t h i n t h e A 1 6
S
W
I Good SW2 LOCA170N REVA ding REVD
address space. With this switch in
the VXI position, address bits A14 and A15 must be 1 for Al6 selection. Switch SW1 is then used
to select the Logical Address for the module. With SW2-3 in the VME position, the module can be
mapped to any 64 byte block in the A 16 address space. SW2-1 and SW2-2 set the Al4 and A 15
address bits, and SW1 is used to set the A13 through A6 address bits.
Switch SW2-4 controls the status /
ID byte returned during interrupt
acknowledge cycles. With SW2-4 in
the VXI position, the Status / ID byte
returned d u r i n g i n t e r r u p t
acknowledge cycles is the Logical
Address set with SW1. When SW2-
4 is in the VME position, the Status
/ ID byte returned during interrupt
acknowledge cycles i s the user
programmable vector loaded into the
VECTOR register (discussed i n
CHAPTER 3).
Datum Inc., Bancomm Div.
SW I
P1
8
SW2
SW I and SW2 LOCATION REVE
bc635VME/bc350VXI Manual
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