DTC2278VL (900085-89B/D) 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) interface drives
Floppy drives supported:	Two 360KB, 720KB, 1.2MB or 1.44MB drives

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

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	IDE IRQ14 enabled	W6	pins 1 & 2 closed
	IDE IRQ15 enabled	W6	pins 2 & 3 closed
»	Parallel port is output only	W17	pins 1 & 2 closed
	Parallel port is input/output	W17	pins 2 & 3 closed
»	Game port enabled	W26	closed
	Game port disabled	W26	open

IDE DATA TRANSFER RATES (FOR 33MHZ VL-BUS PC)
Rate		W1	W2	W3	W4	W5
»	3.9MB/s	pins 1 & 2	pins 2 & 3	pins 2 & 3	pins 2 & 3	pins 1 & 2
	3.3MB/s	pins 2 & 3	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 1 & 2
	3.5MB/s	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 2 & 3	pins 1 & 2
	3.7MB/s	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 2 & 3	pins 1 & 2
	4.2MB/s	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 1 & 2
	4.4MB/s	pins 1 & 2	pins 1 & 2	pins 2 & 3	pins 2 & 3	pins 1 & 2
	4.8MB/s	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 2 & 3	pins 1 & 2
	5.1MB/s	pins 2 & 3	pins 2 & 3	pins 2 & 3	pins 1 & 2	pins 1 & 2
	5.6MB/s	pins 2 & 3	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 1 & 2
	6.1MB/s	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 1 & 2
	6.7MB/s	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 1 & 2
	7.4MB/s	pins 1 & 2	pins 2 & 3	pins 2 & 3	pins 1 & 2	pins 1 & 2
	8.3MB/s	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 1 & 2
Note:The pins indicated should be closed.

IDE DATA TRANSFER RATES (FOR NON-33MHZ VL-BUS PC)
Rate	W1	W2	W3	W4	W5
3.3MB/s	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 2 & 3
3.6MB/s	pins 1 & 2	pins 1 & 2	pins 2 & 3	pins 2 & 3	pins 2 & 3
3.8MB/s	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 2 & 3	pins 2 & 3
4.2MB/s	pins 2 & 3	pins 2 & 3	pins 2 & 3	pins 1 & 2	pins 2 & 3
4.5MB/s	pins 2 & 3	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 2 & 3
5.0MB/s	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 2 & 3
5.6MB/s	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 2 & 3
6.3MB/s	pins 1 & 2	pins 2 & 3	pins 2 & 3	pins 1 & 2	pins 2 & 3
7.2MB/s	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 2 & 3
Note:The pins indicated should be closed.

FLOPPY DRIVE CONFIGURATION
Address		W7	W10
»	3F0h	pins 2 & 3 closed	pins 1 & 2 closed
	370h	pins 1& 2 closed	pins 1 & 2 closed
	Disabled	N/A	pins 2 & 3 closed

IDE CONFIGURATION
Address		W8	W9
»	1F0h	pins 2 & 3 closed	pins 1 & 2 closed
	170h	pins 1& 2 closed	pins 1 & 2 closed
	Disabled	N/A	pins 2 & 3 closed

SERIAL PORT 1 CONFIGURATION
COM/Address		W11	W12
»	COM1/3F8h	pins 1 & 2 closed	pins 2 & 3 closed
	COM3/3E8h	pins 2 & 3 closed	pins 1 & 2 closed
	COM4/2E8h	pins 1& 2 closed	pins 1 & 2 closed
	Disabled	pins 2 & 3 closed	pins 2 & 3 closed

SERIAL PORT 1 INTERRUPT SELECT
IRQ		W18	W19	W20
»	IRQ4	closed	open	open
	IRQ3	open	closed	open
	IRQ5	open	open	closed
	Disabled	open	open	open

SERIAL PORT 2 CONFIGURATION
COM/Address		W13	W14
»	COM2/2F8h	pins 1 & 2 closed	pins 2 & 3 closed
	COM3/3E8h	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

SERIAL PORT 2 INTERRUPT SELECT
IRQ		W21	W22	W23
»	IRQ3	closed	open	open
	IRQ4	open	closed	open
	IRQ5	open	open	closed
	Disabled	open	open	open

PARALLEL PORT CONFIGURATION
LPT/Address		W15	W16
»	LPT1/378h	pins 2 & 3 closed	pins 1& 2 closed
	LPT2/278h	pins 1& 2 closed	pins 2 & 3 closed
	LPT3/3BCh	pins 1& 2 closed	pins 1 & 2 closed
	Disabled	pins 2 & 3 closed	pins 2 & 3 closed

PARALLEL PORT INTERRUPT SELECT
IRQ		W24	W25
»	IRQ7	closed	open
	IRQ5	open	closed
	Disabled	open	open