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DTC5280I, DTC7280

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