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WINCHESTER/FLOPPY DISK CONTROLLER

ALPHA DESIGN

WINCHESTER/FLOPPY DISK CONTROLLER

Data bus:

16-bit ISA

Size:

Three-quarter length, Full-height card

Hard drive supported:

Two ST506/412 drives

Floppy drives supported:

360KB, 720KB, 1.2MB, 1.44MB

CONNECTIONS

Function

Location

4-pin connector - drive active LED

J1

20-pin data cable connector - drive 1

J2

20-pin data cable connector - drive 0

J3

34-pin control cable connector - hard drive

J4

34-pin control cable connector - floppy drive

J5

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Primary address select

JP1

pins 2 & 3, 5 & 6 closed

 

Alternate address select

JP1

pins 1 & 2, 4 & 5 closed

Precompensation is 125ns

J6

open

 

Precompensation is 187ns

J6

closed

Single speed floppy drive select

J7

open

 

Dual speed floppy drive select

J7

closed