![background image](http://html1.mh-extra.com/html/keithley/pio-96/pio-96_instruction-manual_3969638022.webp)
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
Summary of Contents for PIO-96
Page 1: ...PIO 96 ISABusDigitalI OBoard Instruction Manual...
Page 8: ...ii...
Page 10: ...iv...
Page 12: ...vi...
Page 13: ...1 General Description...
Page 16: ...1 4 General Description PIO 96 User s Manual...
Page 17: ...2 Installation...
Page 27: ...3 Programming...
Page 29: ...A Specifications...
Page 31: ...B I O Address Map...
Page 35: ...C User Serviceable Parts...
Page 39: ...This page intentionally left blank...
Page 40: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...