DATA TECHNOLOGY CORPORATION

DTC5287CR, DTC5287I, DTC7287

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two RLL ST506/412 drives with 17,32, or 60 sector mapping

Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB

Sector interleave: DTC5287CR: 1:1

DTC5287i: 2:1

DTC7287: 1:1

CONNECTIONS

Function

Location

34-pin data cable connector-floppy drive

J1

34-pin control cable connector-hard drive

J2

20-pin data cable connector-drive 0

J3

20-pin data cable connector-drive 1

J4

4-pin connector-drive active LED

J5

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

Floppy drive data transfer rate is 500KHz

W4

open

 

Floppy drive data transfer rate is 250KHz

W4

closed

»

Hardware drive select mode

(drive number is driven directly to the interface)

W5

closed

 

Firmware drive select mode

(drive number is intercepted by controller firmware)

W5

open

»

Auto-deselect enabled

W6

closed

 

Auto-deselect disabled

W6

open

»

Floppy drive precompensation scaled by data rate:

500KHz=125ns, 300KHz=208ns, 250KHz=250ns

W7

open

 

Floppy drive precompensation is 125ns

W7

closed

»

Factory configured - do not alter

W8

closed

»

BIOS address is C800h

W9

open

 

BIOS address is D800h

W9

closed

»

BIOS enabled

W10

closed

 

BIOS disabled

W10

open

HARD DRIVE PORT ADDRESS

Address

W2

W3

»

Port addresses are 1F0-1F7 3F2-3F7h

open

open

 

Port addresses are 170-177 372-377h

closed

closed