HwMuseum | Index

COMPUADD, INC.

HARDCACHE/ESDI

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two RLL ESDI drives

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

CONNECTIONS

Function

Location

20-pin data cable connector-drive 1

J1

20-pin data cable connector-drive 0

J2

34-pin data cable connector-floppy drive

J3

34-pin control cable connector-hard drive

J4

4-pin connector-drive active LED

J5

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

Floppy drive type is AT-type

W1

pins 1 & 2 closed

 

Floppy drive type is PS/2 type 1.44MB

W1

pins 2 & 3 closed

»

Floppy Drive Interrupt is IRQ6

W2

pins 1 & 2 closed

 

Floppy Drive Interrupt is IRQ10

W2

pins 2 & 3 closed

»

Floppy Drive DMA Acknowledge is DACK2

W3

pins 1 & 2 closed

 

Floppy Drive DMA Acknowledge is DACK3

W3

pins 2 & 3 closed

»

Floppy Drive DMA Request is DREQ2

W4

pins 1 & 2 closed

 

Floppy Drive DMA Request is DREQ3

W4

pins 2 & 3 closed

»

Hard drive address 1F0-1F7h

W5

open

 

Hard drive address 170-177h

W5

closed

»

Floppy drive address 3F0-3F7h

W6

open

 

Floppy drive address 370-377h

W6

closed

»

BIOS enabled

W7

closed

 

BIOS disabled

W7

open

»

BIOS address C800-C9FFh

W8

open

 

BIOS address CA00-CBFFh

W8

closed

»

Floppy drive enabled

W9

open

 

Floppy drive disabled

W9

closed

»

Floppy drive single spindle speed enabled

W10

open

 

Floppy drive dual spindle speed enabled

W10

closed

»

256KB SIMM's supported

W11

pins 1 & 2 closed

 

1MB SIMM's supported

W11

pins 2 & 3 closed

»

Block Data Transfer mode enabled

W12

pins 1 & 2 closed

 

IRQ-Paced Data Transfer mode enabled

W12

pins 2 & 3 closed

»

Factory configured - do not alter

W13

open