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12F/12

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