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DTC5287CR, DTC5287I, DTC7287

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