DTC3280A, DTC3280AS (400480-89XX) Hard Disk/Floppy Controller Settings and Configuration

DATA TECHNOLOGY CORPORATION

DTC3280A, DTC3280AS (400480-89XX)

Data bus: 16-bit, ISA.

Size: Half-length, full-height card.

Hard drives supported: Up to seven SCSI devices

Floppy drives supported: DTC3180A: None

DTC3280A: Four 360KB, 720KB, 1.2MB or 1.44 MB drives

CONNECTIONS
Function
Location
50-pin SCSI connector-external
J1
50-pin SCSI connector-internal
J2
34-pin data cable connector-floppy drive (DTC3280A and AS only)
J3
4-pin connector-drive active LED
J4

USER CONFIGURABLE SETTINGS
Function
Location
Setting
»
Single-speed floppy supported
SW1/switch 7
off

Dual-speed floppy supported
SW1/switch 7
on
»
PS/2-type floppy on Drive Select 2 not supported
SW1/switch 8
on

PS/2-type floppy drive on Drive Select 2 supported
SW1/switch 8
off
»
Floppy drive precomp. is scaled by data rate:
500KHz=125ns, 300KHz=208ns, 250KHz=250ns
SW1/switch 9
off

Floppy drive precompensation is 125ns
SW1/switch 9
on
»
Floppy drive enabled
SW1/switch 10
on

Floppy drive disabled
SW1/switch 10
off
»
Factory configured - do not alter
SW2/switch 3
off
»
Factory configured - do not alter
SW2/switch 4
off
»
SCSI parity check enabled
SW2/switch 5
off

SCSI parity check disabled
SW2/switch 5
on
»
2KB SRAM selected
W1
pins 2 & 3 closed

8KB SRAM selected
W1
pins 1 & 2 closed
»
Floppy drive address 3F2-3F7h
W2
pins 1 & 2 closed

Floppy drive address 372-377h
W2
pins 2 & 3 closed

INQUIRY INTERRUPT REQUEST "B " OPTIONS
IRQ
SW1/switch 1
SW1/switch 2
SW1/switch 3
SW1/switch 4
»
IRQ11
off
off
on
off

IRQ10
off
off
off
on

IRQ12
off
on
off
off

IRQ15
on
off
off
off

Disabled
off
off
off
off

BIOS ADDRESS
Address
SW1/switch 5
SW1/switch 6
»
D800h
off
off

C800h
off
on

DC00h
on
off

CC00h
on
on

INTERRUPT REQUEST
IRQ
SW2/switch 1
SW2/switch 2
»
IRQ11
off
on

IRQ12
on
off

IRQ10
on
on

IRQ15
off
off

SCSI ADDRESS
SCSI ID
SW2/switch 6
SW2/switch 7
SW2/switch 8

0
on
on
on

1
off
on
on

2
on
off
on

3
off
off
on

4
on
on
off

5
off
on
off

6
on
off
off
»
7
off
off
off

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DTC3280A, DTC3280AS (400480-89XX) Hard Disk/Floppy Controller Settings and Configuration

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CONNECTIONS
Function	Location
50-pin SCSI connector-external	J1
50-pin SCSI connector-internal	J2
34-pin data cable connector-floppy drive (DTC3280A and AS only)	J3
4-pin connector-drive active LED	J4

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Single-speed floppy supported	SW1/switch 7	off
	Dual-speed floppy supported	SW1/switch 7	on
»	PS/2-type floppy on Drive Select 2 not supported	SW1/switch 8	on
	PS/2-type floppy drive on Drive Select 2 supported	SW1/switch 8	off
»	Floppy drive precomp. is scaled by data rate: 500KHz=125ns, 300KHz=208ns, 250KHz=250ns	SW1/switch 9	off
	Floppy drive precompensation is 125ns	SW1/switch 9	on
»	Floppy drive enabled	SW1/switch 10	on
	Floppy drive disabled	SW1/switch 10	off
»	Factory configured - do not alter	SW2/switch 3	off
»	Factory configured - do not alter	SW2/switch 4	off
»	SCSI parity check enabled	SW2/switch 5	off
	SCSI parity check disabled	SW2/switch 5	on
»	2KB SRAM selected	W1	pins 2 & 3 closed
	8KB SRAM selected	W1	pins 1 & 2 closed
»	Floppy drive address 3F2-3F7h	W2	pins 1 & 2 closed
	Floppy drive address 372-377h	W2	pins 2 & 3 closed

INQUIRY INTERRUPT REQUEST "B " OPTIONS
IRQ		SW1/switch 1	SW1/switch 2	SW1/switch 3	SW1/switch 4
»	IRQ11	off	off	on	off
	IRQ10	off	off	off	on
	IRQ12	off	on	off	off
	IRQ15	on	off	off	off
	Disabled	off	off	off	off

BIOS ADDRESS
Address		SW1/switch 5	SW1/switch 6
»	D800h	off	off
	C800h	off	on
	DC00h	on	off
	CC00h	on	on

INTERRUPT REQUEST
IRQ		SW2/switch 1	SW2/switch 2
»	IRQ11	off	on
	IRQ12	on	off
	IRQ10	on	on
	IRQ15	off	off

SCSI ADDRESS
SCSI ID		SW2/switch 6	SW2/switch 7	SW2/switch 8
	0	on	on	on
	1	off	on	on
	2	on	off	on
	3	off	off	on
	4	on	on	off
	5	off	on	off
	6	on	off	off
»	7	off	off	off