VL IDE & I/O CONTROLLER Hard Disk/Floppy Controller Settings and Configuration

Data bus:	32-bit, VL-bus
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
10-pin serial port (COM1/3/4) - external	CN1
25-pin parallel port (LPT1/2/3) - external	CN2
40-pin IDE(AT) Interface connector	JP4
34-pin control cable connector - floppy drive	JP6
10-pin serial port (COM2/3/4) - internal	JP8
15-pin game port - internal	JP9
4-pin connector - Drive active LED	JP20

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Floppy drive enabled	J1	pins 2 & 3 closed
	Floppy drive disabled	J1	pins 1 & 2 closed
»	Hard drive port address is 1F0-1F7h	J2	pins 2 & 3 closed
	Hard drive port address is 170-177h	J2	pins 1 & 2 closed
»	Floppy drive booting sequence is A:/B:	J3	pins 2 & 3 closed
	Floppy drive booting sequence is B:/A:	J3	pins 1 & 2 closed
»	Hard drive enabled	J4	pins 2 & 3 closed
	Hard drive disabled	J4	pins 1 & 2 closed
»	Hard drive port address is 1F0-1F7, 3F0-3F7h	J5	pins 2 & 3 closed
	Hard drive port address is 170-177, 370-377h	J5	pins 1 & 2 closed

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Game Port (CN6) enabled	J12	pins 2 & 3 closed
	Game Port (CN6) disabled	J12	pins 1 & 2 closed
»	Local bus clock speed 33 MHz or 50 MHz	J16	pins 2 & 3 closed
	Local bus clock speed 25 MHz or 40 MHz	J16	pins 1 & 2 closed
»	Single hard drive supported	JP5	closed
	Two hard drives supported	JP5	open
»	Parallel port is bi-directional	JP7	closed
	Parallel port is uni-directional	JP7	open
»	Hard drive Interrupt IRQ14 enabled	JP10	closed
	Hard drive Interrupt IRQ14 disabled	JP10	open
»	Serial Port 2 (JP8) Interrupt IRQ3 enabled	JP11	closed
	Serial Port 2 (JP8) Interrupt IRQ3 disabled	JP11	open
»	Serial Port 1 (CN1) Interrupt IRQ4 enabled	JP12	closed
	Serial Port 1 (CN1) Interrupt IRQ4 disabled	JP12	open
»	Floppy drive Interrupt IRQ6 enabled	JP13	closed
	Floppy drive Interrupt IRQ6 disabled	JP13	open

PARALLEL PORT (CN2) CONFIGURATION
LPT		J6	J7
»	LPT1 (378-37Fh)	pins 2 & 3 closed	pins 2 & 3 closed
	LPT2 (278-27Fh)	pins 1 & 2 closed	pins 1 & 2 closed
	LPT3 (3BC-3BEh)	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	pins 1 & 2 closed	pins 2 & 3 closed

SERIAL PORT 1 (CN1) CONFIGURATION
COM		J8	J9
»	COM1 (3F8-3FFh)	pins 2 & 3 closed	pins 2 & 3 closed
	COM3 (3E8-3EFh)	pins 1 & 2 closed	pins 1 & 2 closed
	COM4 (2E8-2EFh)	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	pins 1 & 2 closed	pins 2 & 3 closed

SERIAL PORT 2 (JP8) CONFIGURATION
COM		J10	J11
»	COM2 (2F8-2FFh)	pins 2 & 3 closed	pins 2 & 3 closed
	COM3 (3E8-3EFh)	pins 2 & 3 closed	pins 1 & 2 closed
	COM4 (2E8-2EFh)	pins 1 & 2 closed	pins 1 & 2 closed
	Disabled	pins 1 & 2 closed	pins 2 & 3 closed

HARD DRIVE TIMING OPTION
Function		J15	JP17
»	VESA mode enabled	pins 2 & 3 closed	open
	ISA mode enabled	pins 1 & 2 closed	closed

PARALLEL PORT (CN2) INTERRUPT REQUEST
IRQ		JP14	JP15
	5	closed	open
	7	open	closed
»	Disabled	open	open

MISCELLANEOUS TECHNICAL NOTES

Jumpers JP16 & JP18 are not used.