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2-6
Installation
PIO-96 User’s Manual
For example, to set a base address of 300h (768 decimal), move switches 9 and 8 into the OFF
position while leaving all other switches in the ON position. Figure 2-1 shows the PIO-96 base
address switch and the address values corresponding to each of the seven poles. Figure 2-2
shows the board location of the base address switch.
Set the base address now. When you have finished setting the base address, continue with
“Setting the wait-state jumper.”
Figure 2-1
Base address switch values
Figure 2-2
Board component locations
Setting the wait-state jumper
The wait-state PIO-96 generator insures a 300ns I/O cycle time, minimum, as required by the
8255. If your computer does not require the wait-state generator, it can be disabled by setting the
board’s wait-state jumper to the OFF position.
The PIO-96 is shipped with the wait-state generator disabled (jumper block set on the two pins
farthest from the base address switch). To enable the wait-state generator, place the jumper on
the two pins closest to the base address switch.
Continue with the next procedure, “Connecting cables to the board.”
1
2
3
4
5
6
A9
A8
A7
A6
A5
A4
16
32
64
128
256
512
10
20
40
80
100
200
Computer
Address Line
Decimal Value
Hexadecimal Value
Switch settings indicate a base
address of:
512 + 256 = 768 Decimal
200h + 100h = 300h
or
O
N
Содержание PIO-96
Страница 1: ...PIO 96 ISABusDigitalI OBoard Instruction Manual...
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Страница 10: ...iv...
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Страница 13: ...1 General Description...
Страница 16: ...1 4 General Description PIO 96 User s Manual...
Страница 17: ...2 Installation...
Страница 27: ...3 Programming...
Страница 29: ...A Specifications...
Страница 31: ...B I O Address Map...
Страница 35: ...C User Serviceable Parts...
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Страница 40: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...