SR4 Hard Disk/Floppy Controller Settings and Configuration

Data bus:	16-bit ISA
Size:	Three/quarter-length, full-height card
Hard drive supported:	Two RLL ST506/412 drives
Floppy drives supported:	Four 360KB, 720KB, 1.2MB, 1.44MB drives

CONNECTIONS
Function	Location
34-pin control cable connector - hard drive	J1
20-pin data cable connector	J2
20-pin data cable connector	J3
34-pin connector - floppy drive interface (drives 1 & 2)	J4
4-pin connector - drive active LED	J5
34-pin connector - floppy drive interface (drives 3 & 4)	J6

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Floppy drive interface address select primary	W3	open
	Floppy drive interface address select secondary	W3	closed
»	Hard drive interface address select primary	W4	open
	Hard drive interface address select secondary	W4	closed
»	On-board BIOS enabled	W6	closed
	On-board BIOS disabled	W6	open

HARD DRIVE INTERFACE CONFIGURATION
Setting		W1	W2
»	Enabled	closed	pins 2 & 3 closed
	Disabled	open	pins 1 & 2 closed

FLOPPY DRIVE INTERFACE CONFIGURATION
Setting		W5	W7
»	Enabled	closed	closed
	Disabled	open	open

BASE MEMORY ADDRESS SELECTION
Address	W8	W9
C8000h	closed	closed
CC000h	closed	open
D0000h	open	closed
D4000h	open	open