L50 Hard Disk/Floppy Controller Settings and Configuration

Data bus:	32-bit VL-bus
Size:	Three-quarter length, full-height card
Hard drive supported:	Four IDE(AT) drives
Floppy drives supported:	Two 360KB, 720KB, 1.2MB, 1.44MB, or 2.88MB drives

CONNECTIONS
Function	Location
40-pin primary IDE(AT) connector	CN1
40-pin secondary IDE(AT) connector	CN2
34-pin cable connector - floppy drive	CN3
10-pin serial port 1	CN4
10-pin serial port 2	CN5
16-pin game port	CN6
15-pin video port	CN7
25-pin parallel port	CN8
VESA feature connector	CN9
4-pin connector - drive active LED	JP28

VGA CONFIGURATION
Mode		JP4	JP5
»	Enabled	pins 1 & 2 closed	pins 1 & 2 closed
	Disabled	pins 2 & 3 closed	pins 2 & 3 closed

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	IRQ9 disabled	JP3/pins 1 & 2	closed
	IRQ9 enabled	JP3/pins 2 & 3	closed
»	Primary IDE(AT) interface enabled	JP6/pins 1 & 2	closed
	Primary IDE(AT) interface disabled	JP6/pins 2 & 3	closed
»	Floppy drive interface enabled	JP11/pins 1 & 2	closed
	Floppy drive interface disabled	JP11/pins 2 & 3	closed
»	Ignores cable select configuration for floppy drives	JP12/pins 1 & 2	closed
	Checks for cable select configuration	JP12/pins 2 & 3	closed
»	Game port enabled	JP13/pins 1 & 2	closed
	Game port disabled	JP13/pins 2 & 3	closed
»	Parallel port IRQ 7 select	JP18/pins 1 & 2	closed
	Parallel port IRQ 5 select	JP18/pins 2 & 3	closed

PARALLEL PORT ADDRESS SELECTION
LPT		JP14	JP15
»	LPT1 (378h)	pins 1 & 2 closed	pins 1 & 2 closed
	LPT2 (278h)	pins 1 & 2 closed	pins 2 & 3 closed
	LPT3 (3BCh)	pins 2 & 3 closed	pins 2 & 3 closed
	Disabled	pins 2 & 3 closed	pins 1 & 2 closed

SERIAL PORT 1 ADDRESS SELECTION
COM		JP21	JP22
»	COM1 (3F8h)	pins 1 & 2 closed	pins 1 & 2 closed
	COM2 (2F8h)	pins 1 & 2 closed	pins 2 & 3 closed
	COM3 (3E8h)	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	pins 2 & 3 closed	pins 2 & 3 closed

SERIAL PORT 2 ADDRESS SELECTION
COM		JP23	JP24
»	COM2 (2F8h)	pins 1 & 2 closed	pins 1 & 2 closed
	COM1 (3F8h)	pins 1 & 2 closed	pins 2 & 3 closed
	COM4 (2E8h)	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	pins 2 & 3 closed	pins 2 & 3 closed

SERIAL PORT 1 INTERRUPT SELECTION
IRQ		JP25/Pins 1 & 2	JP26/Pins 1 & 2	JP27/Pins 1 & 2
»	IRQ4	closed	open	open
	IRQ3	open	closed	open
	IRQ5	open	open	closed

SERIAL PORT 2 INTERRUPT SELECTION
IRQ		JP25/Pins 2 & 3	JP26/Pins 2 & 3	JP27/Pins 2 & 3
»	IRQ3	open	closed	open
	IRQ4	closed	open	open
	IRQ5	open	open	closed

PARALLEL PORT MODE CONFIGURATION
Mode		JP16	JP17
»	SPP	pins 1 & 2 closed	pins 1 & 2 closed
	EPP	pins 1 & 2 closed	pins 2 & 3 closed
	ECP	pins 2 & 3 closed	pins 1 & 2 closed

DMA SELECTION FOR ECP MODE
Channel		JP19	JP20
»	DMA 3	pins 1 & 2 closed	pins 1 & 2 closed
	DMA 1	pins 2 & 3 closed	pins 2 & 3 closed

MEMORY ADDRESSING
Linear Address		JP1	JP2
»	64MB	pins 1 & 2 closed	pins 1 & 2 closed
	2GB	pins 2 & 3 closed	pins 2 & 3 closed

SECONDARY IDE ADDRESS SELECTION
Address		JP7	JP8
»	Secondary	pins 1 & 2 closed	pins 1 & 2 closed
	Primary	pins 1 & 2 closed	pins 2 & 3 closed
	Disabled	pins 2 & 3 closed	pins 2 & 3 closed

SECONDARY IDE INTERRUPT SELECTION
IRQ		JP9	JP10
»	15	pins 1 & 2 closed	pins 1, 2 & 3 open
	10	pins 1, 2 & 3 open	pins 1 & 2 closed
	12	pins 1, 2 & 3 open	pins 2 & 3 closed
	14	pins 2 & 3 closed	pins 1, 2 & 3 open

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(8) 256K x 4	None
2MB	(8) 256K x 4	(2) 256K x 16