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CONNECTIONS
The connector on the upper edge of the 821 controller card is daisy-chained with
all
of the interface cards.
Each interface card is attached to
a
Winchester drive.
CONFIGURING THE
821
WINCHESTER comROLLER BOARD
Address Selection (Pad APRS)
The upper pair is connected for 5" drives, setting the board address to AOH.
This connection is etched.
The lower pair is shunted for
8"
drives, which sets the board address to A8H,
ADRS
o
o
ECC Test OQtion (Pad ECC)
Normally, the upper pair is shunted.
The lower palr is shunted for use with the
TESTECC command in the test program.
RUN
r
o
o
TEST
Interrupt Level Selection (pad 1m)
Installation of a shunt selects the interrupt level for the controller.
Normally,
V 14 is etched.
INT
VIl
o
o
1
VI2
o
o
2
VB
o
o
3
VI4
1
o
4
VI5
o
o
5
VI6
o
o
6
IMS International
5000 Series Microcomputers/7.01,83/page 80
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