ULTRASTOR CORPORATION

12F/12

Data Bus

16-bit ISA

Card Size

Three-quarter length, half-height card

Hard Drives supported

Two ESDI drives

Floppy drives supported

Two 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS

Function

Location

Function

Location

34-pin cable connector - floppy drive

J1

20-pin cable connector - drive 0

J4

4-pin connector - drive active LED

J2

34-pin control cable connector - hard drive

J5

20-pin cable connector - drive 1

J3

 

 

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Factory configured - do not alter

JP1

Unidentified

»

Factory configured - do not alter

JP3

Closed

»

On-board cache enabled

JP4

Open

 

On-board cache disabled

JP4

Pins 3 & 4 closed

»

Factory configured - do not alter

JP9

Open

»

Third floppy drive with twisted cable - jumper drive as DS2

JP11/1

Open

 

Third floppy drive with straight cable - jumper drive as DS4

JP11/1

Closed

»

Drive 1 AT configured

JP11/2

Open

 

Drive 1 3.5 inch PS/2 configured (different pin 2 polarity)

JP11/2

Closed

»

Drive 0 AT configured

JP11/3

Open

 

Drive 0 3.5 inch PS/2 configured (different pin 2 polarity)

JP11/3

Closed

»

Floppy drive primary address is 3F0h

JP11/4

Open

 

Floppy drive secondary address is 370h

JP11/4

Closed

»

Single speed floppy drive enabled

JP11/5

Open

 

Dual speed floppy drive enabled

JP11/5

Closed

»

Precomp varies according to floppy data rate

JP11/6

Open

 

Precomp is 125 ns

JP11/6

Closed

»

Hard drive primary address select (1F0-1F7h)

JP12

Open

 

Hard drive secondary address select (170-177h)

JP12

Closed

USER CONFIGURABLE SETTINGS (CONTINUED)

Function

Label

Position

»

Chassis ground not connected to logic ground

JP16

Open

 

Chassis ground connected to logic ground

JP16

Closed

 

Floppy interface disabled

JP17

Open

 

Floppy interface enabled

JP17

Closed

»

IRQ 14 select

JP20

Pins 2 & 3 closed

 

IRQ 15 select

JP20

Pins 1 & 2 closed

Note: Jumpers JP1 and JP9 are removed on revision B00. Location of jumper JP16 is unidentified.

CACHE CONFIGURATION

Data buffer

JP5

JP6

»

8KB

Pins 2 & 3 closed

Pins 1 & 2 closed

 

32KB

Pins 1 & 2 closed

Pins 1 & 2 closed

BIOS ADDRESS SELECTION

Address

JP10/pins 1 & 2

JP10/pins 3 & 4

JP10/pins 5 & 6

»

C8000h

Open

Open

Closed

 

CC000h

Open

Closed

Open

 

D0000h

Open

Closed

Closed

 

D4000h

Closed

Open

Open

 

D8000h

Closed

Open

Closed

 

DC000h

Closed

Closed

Open

 

Disabled

Open

Open

Open