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LRK-330/331
LARK ASSOCIATES, INC.
LRK-330/331
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Data bus:
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16-bit ISA
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Size:
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Three-quarter length, full-height card
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Hard drive supported:
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Two ESDI drives
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Floppy drives supported:
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Two 360KB, 720KB, 1.2MB, or 1.44MB drives
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CONNECTIONS
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Function
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Location
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34-pin cable connector - floppy drive
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J1
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20-pin data cable connector- drive 1
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J3
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20-pin data cable connector- drive 0
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J4
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34-pin control cable connector-hard drive
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J5
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4-pin connector - drive active LED
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J6
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USER CONFIGURABLE SETTINGS
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Function
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Location
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Setting
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Primary hard drive address is 1F0h-1F7h
Primary floppy drive address is 370h-3F7h
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W1
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open
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Secondary hard drive address is 170h-177h
Secondary floppy drive address is 370h-377h
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W1
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closed
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Floppy drive is single speed
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W2
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open
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Floppy drive is dual speed
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W2
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closed
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Interrupt delay disabled
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W3
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open
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Interrupt delay enabled
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W3
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closed
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USER CONFIGURABLE SETTINGS (CONTINUED)
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Function
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Location
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Setting
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Factory configured - do not alter
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W4
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N/A
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IDE(AT) IRQ 14 select
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W9
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closed
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IDE(AT) IRQ 15 select
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W10
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closed
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Floppy drive interface enabled
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W11
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open
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Floppy drive interface disabled
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W11
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closed
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Note: W12 is unidentified
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BIOS ADDRESS SELECTION
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Address
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W5
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W6
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W7
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W8
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C800h
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closed
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open
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open
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open
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CC00h
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open
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closed
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open
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open
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D000h
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open
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open
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closed
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open
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D400h
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open
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open
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open
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closed
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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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