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COM/4I, COM/8I
DIGI INTERNATIONAL, INC.
COM/4I, COM/8I
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Card Type
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Serial
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Processor
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80C186
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Processor Speed
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10MHz
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Chipset
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Unidentified
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Maximum Onboard Memory
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256KB RAM
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I/O Options
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Serial ports (4 for COM/4i, 8 for COM/8i)
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Data Bus
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8/16 bit ISA
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Card Size
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Full height, full length
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CONNECTIONS
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Function
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Label
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Function
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Label
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Header to daughterboard H1B
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H1A
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Header to main board H2A (on back of card)
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H2B
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Header to main board H1A (on back of card)
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H1B
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RS-232, RS-422, or RS-485 serial ports via DB-78 connector
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P1
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Header to daughterboard H2B
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H2A
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Note:Standard serial ports are provided on an external expansion box.
The types of serial ports provided are configured at the factory and are not user-configurable.
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USER CONFIGURABLE SETTINGS
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Setting
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Label
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Position
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Factory configured - do not alter
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J17
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Pins 2 & 3 closed
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BASE I/O ADDRESS SELECTION
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Setting
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J2
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J3
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J4
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100h
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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Pins 1 & 2 closed
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110h
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Pins 2 & 3 closed
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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120h
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Pins 2 & 3 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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200h
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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220h
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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Pins 1 & 2 closed
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300h
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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320h
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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INTERRUPT SELECTION
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Setting
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J5
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J6
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J7
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J8
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J9
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2/9
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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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3
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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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4
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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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5
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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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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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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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Closed
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10
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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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11
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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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12
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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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15
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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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| »
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Disabled
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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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INTERRUPT SELECTION (CON'T)
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Setting
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J10
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J11
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J12
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J13
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J14
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2/9
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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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3
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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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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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5
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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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6
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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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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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10
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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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11
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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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12
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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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15
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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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Disabled
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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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SHARED MEMORY ADDRESS SELECTION
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Setting
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J15
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J16
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0C0000h
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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0C8000h
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Pins 2 & 3 closed
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Pins 1 & 2 closed
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0D0000h
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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0D8000h
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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EPROM SIZE SELECTION
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Setting
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JP1
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JP2
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8KB
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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16KB
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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32KB
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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64KB
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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