DATA TECHNOLOGY CORPORATION

DTC5280I, DTC7280

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two MFM ST506/412 drives

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

Interface: DTC5280i: 2:1

DTC7280: 1:1

CONNECTIONS

Function

Location

34-pin control cable connector-floppy drive

J1

34-pin data cable connector-hard drive

J2

20-pin data cable connector-drive 0

J3

20-pin data cable connector-drive 1

J4

5-pin connector-drive active LED

J5

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

Initial floppy data transfer rate is 500KHz

W4

open

 

Initial floppy data transfer rate is 250KHz

W4

closed

»

Hardware drive select mode enabled

W5

closed

 

Firmware drive select mode enabled

W5

open

»

Auto-deselect enabled

W6

closed

 

Auto-deselect disabled

W6

open

»

Floppy drive precompensation is scaled by data rate:

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

W7

open

 

Floppy drive precompensation is 125ns

W7

closed

HARD DRIVE PORT ADDRESS

Address

W2

W3

»

Port addresses are 1F0-1F7 3F03F7h

open

open

 

Port addresses are 170-177 370377h

closed

closed