DTC 2278E (400516-89A) Hard Disk/Floppy Controller Settings and Configuration

Data bus:	32-bit VL-Bus
Size:	Three/quarter-length, half-height card
Hard drive supported:	Two IDE(AT) or EIDE interface drives
Floppy drives supported:	Two 360KB, 720KB, 1.2MB, 1.44MB drives

CONNECTIONS
Function	Location
10-pin serial port 2 - internal	J2
9-pin serial port 1 - external	J3
16-pin game port	J4
34-pin cable connector - floppy drive	J5
40-pin connector - secondary IDE(AT) interface	J6
40-pin connector - primary IDE(AT) interface	J7
4-pin connector - drive active LED	J8
25-pin parallel port - external	J9

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Game port enabled	W14	closed
	Game port disabled	W14	open

PARALLEL PORT INTERRUPT
IRQ		W12	W13
»	IRQ7	open	closed
	IRQ5	closed	open

PARALLEL PORT ADDRESS SELECTION
LPT		W1	W2
»	LPT1 (378h)	pins 2 & 3 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 1 & 2 closed	pins 1 & 2 closed

SERIAL PORT 1 ADDRESS SELECTION
COM		W5	W6
»	COM1 (3F8h)	pins 1 & 2 closed	pins 2 & 3 closed
	COM3 (3E8h)	pins 2 & 3 closed	pins 1 & 2 closed
	COM4 (2E8h)	pins 2 & 3 closed	pins 2 & 3 closed
	Disabled	pins 1 & 2 closed	pins 1 & 2 closed
Note: COM1 & COM3 are automatically configured to IRQ4. COM2 & COM4 are automatically configured to IRQ3.

SERIAL PORT 2 ADDRESS SELECTION
COM		W3	W4
»	COM2 (2F8h)	pins 1 & 2 closed	pins 2 & 3 closed
	COM3 (3E8h)	pins 2 & 3 closed	pins 2 & 3 closed
	COM4 (2E8h)	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	pins 1 & 2 closed	pins 1 & 2 closed
Note: COM1 & COM3 are automatically configured to IRQ4. COM2 & COM4 are automatically configured to IRQ3.

PARALLEL PORT MODE CONFIGURATION
Mode		W7	W22
»	Printer	pins 2 & 3 closed	pins 2 & 3 closed
	ECP	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	W8	W9	W10	W11
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.