DTC2280E (400521-89A) Hard Disk/Floppy Controller Settings and Configuration

Data bus:	16-bit ISA
Size:	Half-length, half-height card
Hard drive supported:	Two IDE(AT) or EIDE interface drives
Floppy drives supported:	Two 360KB, 720KB, 1.2MB, 1.44MB

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

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Game port enabled	W1	closed
	Game port disabled	W1	open
»	Hard drive interrupt IRQ14 select	W15	pins 1 & 2 closed
	Hard drive interrupt IRQ15 select	W15	pins 2 & 3 closed
»	IDE(AT) interface address is 1F0h	W17	pins 1 & 2 closed
	IDE(AT) interface address is 170h	W17	pins 2 & 3 closed
»	IDE(AT) interface enabled	W18	pins 2 & 3 closed
	IDE(AT) interface disabled	W18	pins 1 & 2 closed

SERIAL PORT 1 CONFIGURATION
Port 1		W21	W22
»	COM1	pins 1 & 2 closed	pins 2 & 3 closed
	COM3	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	pins 1 & 2 closed	pins 1 & 2 closed

SERIAL PORT 2 CONFIGURATION
Port 2		W23	W24
»	COM2	pins 1 & 2 closed	pins 2 & 3 closed
	COM4	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	pins 1 & 2 closed	pins 1 & 2 closed

PARALLEL PORT ADDRESS CONFIGURATION
LPT		W19	W20
»	1 (378h)	pins 2 & 3 closed	pins 1 & 2 closed
	2 (278h)	pins 1 & 2 closed	pins 2 & 3 closed
	3 ( BCh)	pins 2 & 3 closed	pins 2 & 3 closed
	Disabled	pins 1 & 2 closed	pins 1 & 2 closed

SERIAL PORT 1 INTERRUPT SELECTION
IRQ		W12	W13	W14
»	IRQ4	open	open	closed
	IRQ3	open	closed	open
	IRQ5	closed	open	open

SERIAL PORT 2 INTERRUPT SELECTION
IRQ		W9	W10	W11
»	IRQ3	open	open	closed
	IRQ4	open	closed	open
	IRQ5	closed	open	open

PARALLEL PORT INTERRUPT SELECTION
IRQ		W7	W8
»	7	open	closed
	5	closed	open

PARALLEL PORT MODE CONFIGURATION
MODE		W16	W25
»	Printer	pins 2 & 3 closed	pins 2 & 3 closed
	ECP/EPP	pins 2 & 3 closed	pins 1 & 2 closed
	EPP	pins 1 & 2 closed	pins 2 & 3 closed
Note: You must select a DMA channel when using ECP mode.

DMA SELECTION
CHANNEL	W3	W4	W5	W6
1	closed	open	closed	open
3	open	closed	open	closed

MISCELLANEOUS TECHNICAL NOTES

The floppy controller in automatically configured: When a cable is attached, it is enabled, when no cable is attached it is disabled.