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ISI508U
MULTITECH SYSTEMS, INC.
ISI508U
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Card Type
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Serial card
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Chipset Controller
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N/A
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I/O Options
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Serial ports (8 on external panel)
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Maximum DRAM
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N/A
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CONNECTIONS
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Purpose
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Location
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78-pin serial port connector
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CN1
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I/O BASE ADDRESS SELECTION
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Address
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SW1/1
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SW1/2
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SW1/3
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SW1/4
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SW1/5
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SW1/6
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SW1/7
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SW1/8
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| »
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380h
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On
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On
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On
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On
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Off
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Off
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Off
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On
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100h
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On
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On
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On
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On
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On
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Off
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On
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On
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108h
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Off
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On
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On
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On
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On
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Off
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On
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On
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110h
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On
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Off
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On
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On
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On
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Off
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On
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On
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118h
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Off
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Off
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On
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On
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On
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Off
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On
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On
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120h
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On
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On
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Off
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On
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On
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Off
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On
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On
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3D8h
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Off
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Off
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On
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Off
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Off
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Off
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Off
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On
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3E0h
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On
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On
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Off
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Off
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Off
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Off
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Off
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On
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3E8h
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Off
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On
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Off
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Off
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Off
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Off
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Off
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On
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3F0h
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On
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Off
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Off
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Off
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Off
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Off
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Off
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On
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3F8h
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Off
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Off
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Off
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Off
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Off
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Off
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Off
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On
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Note:A total of 96 base address settings are available. The switches are a binary representation of the decimal memory addresses. Switch SW1/8 is the Most Significant Bit and switch SW1/1 is the Least Significant Bit. The switches have the following decimal values: switch SW1/1=8, SW1/2=16, SW1/3=32, SW1/4=64, SW1/5=128, SW1/6=256, SW1/7=512, SW1/8=1024. Turn off the switches and add the values of the switches that are off to obtain the correct memory address. (Off=1, On=0)
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INTERRUPT SELECTION
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IRQ
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J1/A
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J1/B
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J1/C
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J1/D
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J1/E
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J1/F
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| »
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3
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Open
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Closed
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Open
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Open
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Open
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Open
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2/9
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Closed
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Open
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Open
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Open
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Open
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Open
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|
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4
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Open
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Open
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Closed
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Open
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Open
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Open
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5
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Open
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Open
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Open
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Closed
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Open
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Open
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6
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Open
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Open
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Open
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Open
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Closed
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Open
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7
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Open
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Open
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Open
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Open
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Open
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Closed
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