MODEL 2C Hard Disk/Floppy Controller Settings and Configuration

Data Bus	16-bit ISA
Card Size	Half height, half length
Hard Drives Supported	Four IDE(AT) devices
Floppy Drives Supported	None

CONNECTIONS
Function	Label	Function	Label
VESA local bus extension module	J1	40-pin secondary IDE(AT) connector	J7
4-pin DC power out	J5	4-pin drive active LED	J8
40-pin primary IDE(AT) connector	J6

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	Factory configured - do not alter	J4/A	Pins 2 & 3
»	GSI BigaByte support for >4095 cylinder drives disabled	J4/G	Pins 1 & 2
	GSI BigaByte support for >4095 cylinder drives enabled	J4/G	Pins 2 & 3

IDE(AT) INTERFACE CONFIGURATION
Option		Primary Addr.	Secondary Addr.	Primary IRQ	Secondary IRQ
	1	1F0h	170h	IRQ14	IRQ15
	2	170h	Disabled	IRQ15	N/A
	3	170h	Disabled	IRQ12	N/A
»	4	170h	1E8h	IRQ15	IRQ11
	5	170h	1E8h	IRQ15	IRQ12
	6	1E8h	Disabled	IRQ11	N/A
	7	1E8h	Disabled	IRQ12	N/A
	8	1E8h	168h	IRQ11	IRQ10
	9	1E8h	168h	IRQ11	IRQ12

IDE(AT) INTERFACE CONFIGURATION (CON’T)
Option		J4/B	J4/C	J4/D	J9
	1	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 7 & 8 closed
	2	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 7 & 8 closed
	3	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 5 & 7 closed
»	4	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 7 & 8, 4 & 6 closed
	5	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 7 & 8, 5 & 6 closed
	6	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 4 & 6 closed
	7	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 5 & 6 closed
	8	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 4 & 6, 1 & 3 closed
	9	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 4 & 6, 3 & 5 closed

BIOS ADDRESS SELECTION
Setting		J4/E	J4/F
»	C800h	Pins 1 & 2 closed	Pins 1 & 2 closed
	CC00h	Pins 2 & 3 closed	Pins 1 & 2 closed
	D000h	Pins 1 & 2 closed	Pins 2 & 3 closed
	E000h	Pins 2 & 3 closed	Pins 2 & 3 closed