COMPAQ COMPUTER CORPORATION

000519 HARD DISK DRIVE CONTROLLER BOARD

Data bus:	16-bit, ISA
Size:	Three/quarter-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
40-pin IDE(AT) Interface connector	CN1
34-pin control cable connector - floppy drive	CN2
10-pin serial port (COM1/2) - external	CN3
25-pin parallel port (LPT1/2) - external	CN4

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Hard drive port address is 1F0-1F7h Floppy drive port address is 3F0-3F7h	SW500/switch 1	open
	Hard drive port address is 170-177h Floppy drive port address is 370-377h	SW500/switch 1	closed
»	High-speed floppy drive transfer rate enabled	SW500/switch 2	closed
	High-speed floppy drive transfer rate disabled	SW500/switch 2	open
»	Hard drive enabled	SW500/switch 3	open
	Hard drive disabled	SW500/switch 3	closed
»	Serial Port (CN3) is set to COM1	SW500/switch 4	open
	Serial Port (CN3) is set to COM2	SW500/switch 4	closed
»	Serial Port (CN3) enabled	SW500/switch 5	open
	Serial Port (CN3) disabled	SW500/switch 5	closed
»	Parallel Port (CN3) enabled	SW500/switch 6	open
	Parallel Port (CN3) disabled	SW500/switch 6	closed

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