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DTC3280A, DTC3280AS (400480-89XX)

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