HCWD27X Hard Disk/Floppy Controller Settings and Configuration

Data bus:	8-bit ISA
Size:	Half length, full-height card
Hard drive supported:	Two RLL ST506/412 drives
Floppy drives supported:	None

CONNECTIONS
Function	Location
34-pin data cable connector - hard drive	J1
20-pin data cable connector - drive 0	J2
20-pin data cable connector - drive 1	J3
External power connector	J4
4-pin connector - drive active LED	J5

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Interrupt select IRQ5	W27	open
	Interrupt select IRQ2	W27	closed
»	AT compatibility enabled	W28	closed
	XT compatibility enabled	W28	open

ADDRESS SELECT
I/O Address		Base Memory Address	W21	W22
»	320h	C8000h	open	open
	324h	CA000h	closed	open
	328h	CC000h	open	closed
	32Ch	CE000h	closed	closed

PRE-SELECTED DRIVE CONFIGURATION
				Drive 0	Drive 1
	Capacity	Heads	Cylinders	W17	W18	W19	W20
»	32MB	4	615	open	open	open	open
	65MB	6	820	closed	closed	closed	closed
	42MB	4	782	open	closed	open	closed
	21MB	2	782	closed	open	closed	open

TRANSLATION
Setting		Dynamic	Sectors	W25	W26
»	Disabled	Yes	26	open	closed
	Enabled	No	17	closed	open