DTC2278EB (400523-89A) Hard Disk/Floppy Controller Settings and Configuration

Card Type	Hard drive controller card
Hard drives supported	Four IDE(AT) interface drives
Floppy drives supported	Two 360KB, 720KB, 1.2MB, 1.44MB drives
Data-bus	32-bit VESA Local Bus
Size	Full-length, half-height card

CONNECTIONS
Function	Label	Function	Label
25-pin parallel port - external	J1	34-pin control cable connector - floppy drive	J5
10-pin serial port 2 - internal	J2	40-pin IDE(AT) secondary interface connector	J6
9-pin serial port 1 - external	J3	40-pin IDE(AT) primary interface connector	J7
16-pin game port - internal	J4	Drive active LED	J8

USER CONFIGURABLE CONNECTIONS
Function		Location	Setting
»	Game port enabled	W29	Closed
	Game port disabled	W29	Open
»	Floppy drive interface enabled	W30	Pins 1 & 2 closed
	Floppy drive interface disabled	W30	Pins 2 & 3 closed

SERIAL PORT 1 ADDRESS SELECTION
Setting		W22	W23
»	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
Setting	W20	W21
COM1 (3F8h)	Pins 1 & 2 closed	Pins 2 & 3 closed
COM2 (2F8h)	Pins 1 & 2 closed	Pins 1 & 2 closed
COM4 (2E8h)	Pins 2 & 3 closed	Pins 1 & 2 closed
Disabled	Pins 2 & 3 closed	Pins 2 & 3 closed

PARALLEL PORT ADDRESS SELECTION
Setting	W18	W19
LPT1 (378h)	Pins 2 & 3 closed	Pins 1 & 2 closed
LPT2 (278h)	Pins 1 & 2 closed	Pins 1 & 2 closed
LPT3 (3BCh)	Pins 1 & 2 closed	Pins 2 & 3 closed
Disabled	Pins 2 & 3 closed	Pins 2 & 3 closed

SERIAL PORT 1 INTERRUPT SELECTION
IRQ		W15	W16	W17
	IRQ3	Open	Closed	Open
»	IRQ4	Open	Open	Closed
	IRQ5	Closed	Open	Open

SERIAL PORT 2 INTERRUPT SELECTION
IRQ		W12	W13	W14
»	IRQ3	Open	Open	Closed
	IRQ4	Open	Closed	Open
	IRQ5	Closed	Open	Open

PARALLEL PORT INTERRUPT SELECTION
IRQ		W10	W11
	IRQ5	Closed	Open
»	IRQ7	Open	Closed

BIOS ADDRESS SELECTION
Address	W7	W8	W24
C8000h-CBFFFh	Pins 2 & 3 closed	Pins 2 & 3 closed	Closed
CC000h-CFFFFh	Pins 2 & 3 closed	Pins 1 & 2 closed	Closed
D8000h-DBFFFh	Pins 1 & 2 closed	Pins 2 & 3 closed	Closed
DC000h-DFFFFh	Pins 1 & 2 closed	Pins 1 & 2 closed	Closed
Disabled	Open	Open	Open

DMA CHANNEL SELECTION
Channel	W1	W2	W3	W4
1	Closed	Open	Closed	Open
3	Open	Closed	Open	Closed

PARALLEL PORT MODE SELECTION
Setting	W9	W25	W31
Bidirectional /ECP	Pins 2 & 3 closed	Pins 1 & 2 closed	Closed
Bidirectional /EPP	Pins 1 & 2 closed	Pins 2 & 3 closed	Open
Uni-directional	Pins 2 & 3 closed	Pins 2 & 3 closed	Open
EPP & ECP	Pins 1 & 2 closed	Pins 1 & 2 closed	Closed