Data bus: 8-bit, ISA
Size: Full-length, full-height card
Hard drives supported: Two MFM ST506/ST412 drives (5MB to 140MB)
Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB
Maximum heads/cyl.: 16 heads and 1024 cylinders
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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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Drive 0 has 8 heads or less
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JP1
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pins 4 & 6 closed
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Drive 0 has more than 8 heads
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JP1
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pins 2 & 4 closed
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Drive 1 has 8 heads or less
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JP1
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pins 1 & 3 closed
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Drive 1 has more than 8 heads
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JP1
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pins 3 & 5 closed
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Single speed floppyDrive (Dual-speed not supported)
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JP2
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open
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Hard drive port address 1F0-1F7h
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JP3/jumper 1
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closed
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Hard drive port address 170-177h
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JP3/jumper 1
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open
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Floppy drive port address 3F0-3F7h
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JP3/jumper 2
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closed
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Floppy drive port address 370-377h
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JP3/jumper 2
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open
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Factory configured - do not alter
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JP3/jumper 3
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open
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Factory configured - do not alter
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JP3/jumper 4
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open
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Hard Drive Interrupt is IRQ5
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JP4
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pins 1 & 2 closed
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Hard Drive Interrupt is IRQ2 (Not supported)
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JP4
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pins 2 & 3 closed
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Select IRQ6
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JP5/jumpers 1-6
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closed
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Select DMA Channel 2
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JP6/jumpers 1-6
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closed
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Note: JP3/jumpers 3 and 4 allows you to use one EPROM for both BIOS's. Closing JP3/3 connects A13 to socket U12 (pin 26)
Closing JP3/4 redirects the hard drive BIOS select to socket U12 (pin 27)
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