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MB108

NORTHGATE COMPUTER SYSTEMS, INC.

MB108

Data bus:

16-bit, ISA

Size:

Half-length, full-height card

Hard drive supported:

Two IDE (AT) Interface drives

Floppy drives supported:

Two 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS

Function

Location

34-pin control cable connector - (reserved for future use)

J1

34-pin control cable connector - floppy drive

J2

4-pin connector - Drive active LED

J3

40-pin IDE(AT) Interface connector

J6

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Hard drive Interrupt Request IRQ14 enabled

W21

closed

 

Hard drive Interrupt Request IRQ14 disabled

W21

open

HARD DRIVE PORT ADDRESS

Function

SW1/jumper 1

SW1/jumper 2

Hard drive port address is 1F0-1F7h

closed

open

 

Hard drive port address is 170-177h

open

closed

FLOPPY DRIVE PORT ADDRESS

Function

SW1/jumper 1

SW1/jumper 2

Floppy drive port address is 3F0-3F7h

closed

open

 

Floppy drive port address is 370-377h

open

closed

MISCELLANEOUS TECHNICAL NOTES

Jumpers J4 (Drive-type 300Kb/sec) is factory configured to pins 2 & 3 closed - do not alter

J5 (Pump/Precomp) is factory configured to pins 1 & 2 closed - do not alter.