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DTC5280CL, DTC5280CRA, DTC5280CRZ

DATA TECHNOLOGY CORPORATION

DTC5280CL, DTC5280CRA, DTC5280CRZ

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two MFM ST506 drives

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

Sector interleave: 2:1

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

Auto-deselect disabled

W1

open

 

Auto-deselect enabled

W1

closed

Hard drive port addresses are 1F0-1F7 3F0-3F7h

W2 & W3

open

 

Hard drive port addresses are 170-177 370-377h

W2 & W3

closed

Floppy drive data transfer rate is 500KHz

W4

open

 

Floppy drive data transfer rate is 250KHz

W4

closed

Floppy drive precompensation is scaled by data rate:

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

W7

open

 

Floppy drive precompensation is 125ns

W7

closed

DRIVE SELECT MODE

Function

W5

W6/jumper 1 & W6/jumper 2

Firmware D.S. mode - Drv. # driven to interface

closed

pins 2 & 3 closed

 

Firmware D.S. mode - Drv. # intercepted by controller

open

pins 1 & 2 closed

MISCELLANEOUS TECHNICAL NOTES

This controller has no onboard user accessible programs.