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ASC-88
ADVANCED STORAGE CONCEPTS
ASC-88
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Card Type
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Hard drive controller card
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Hard Drives supported
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Up to 7 SCSI devices
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Floppy drives supported
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None
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Data Bus
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8-bit ISA
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Card Size
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Quarter-length, full-height card
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CONNECTIONS
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Function
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Location
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Function
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Location
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50-pin SCSI connector - external
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CN1
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Terminating resistors
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RN1-RN3
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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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Power to external pull-ups disabled
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BUS-PWR
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Pins 1 & 2 closed
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+5V power to external pull-ups enabled
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BUS-PWR
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Pins 3 & 4 closed
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SEGMENT ADDRESS SELECTION
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Setting
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A16
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A15
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A14
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C000h
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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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C400h
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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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C800h
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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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CC00h
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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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D000h
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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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D400h
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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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D800h
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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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DC00h
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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Note:
A total of 8 segment address settings are available. The settings are a binary representation of the hexidecimal segment addresses. A16 is the Most Significant Bit and switch A14 is the Least Significant Bit. The jumpers have the following decimal values: A16=1000h, A15=800h, and A14=400h. Turn off the jumpers by closing pins 1 & 2 and turn on the jumpers by closing pins 2 & 3. Add the values of the jumpers with pins 2 & 3 closed to obtain the correct memory address. (Pins 1 & 2 = Off, Pins 2 & 3 = On.)
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