...because we can't all be on the bleeding edge...





PREFERRED 486 GA/VL ESP

CSS LABORATORIES, INC.

PREFERRED 486 GA/VL ESP

Processor

80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

25/33/50(internal)50/66(internal)/66MHz

Chip Set

OPTI

Max. Onboard DRAM

32/64MB

Cache

64/256/512KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Front panel connector

J39

Power LED & keylock

JP55

IDE interface LED

J40

Turbo switch

JP101

Turbo LED/reset switch

J41

Video to green connector

P1

Speaker

JP1

32-bit VESA Local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Green PC password enabled

J57

Open

 

Green PC password disabled

J57

Closed

VESA bus clock select CPU speed & 1 clock

JP7

Closed

 

VESA bus clock select CPU speed

JP7

Open

Cache burst mode select 2-1-1-1

JP9

Open

 

Cache burst mode select 3-2-2-2

JP9

Closed

CPU type select DX/DX2/Overdrive

JP11

Pins 2 & 3 closed

 

CPU type select Overdrive

JP11

Pins 1 & 2 closed

CPU type select non SX CPU

JP14

Open

 

CPU type select SX CPU

JP14

Pins 2 & 3 closed

Video card address select C000h-C7FFh disabled

JP47

Open

 

Video card address select C000h-C7FFh enabled

JP47

Closed

Flash BIOS enabled

JP52

Pins 1 & 2 closed

 

Flash BIOS disabled

JP52

Pins 2 & 3 closed

Monitor type select color

JP56

Closed

 

Monitor type select monochrome

JP56

Open

Keyboard synchronous with CPU

JP70

Pins 2 & 3 closed

 

Engineer test setting

JP70

Pins 1 & 2 closed

Factory configured - do not alter.

SW1/7

Off

Factory configured - do not alter

SW1/8

Off

DRAM CONFIGURATION (30PIN)

Size

Bank 0

Bank 1

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

Note: This board was manufactured with either 8 banks of 30 pin SIMM sockets or 4 banks of 72 pin SIMM sockets. Mainboard drawing depicts 72 pin SIMM sockets. If mainboard has 30 pin SIMM sockets, use the above table.

DRAM CONFIGURATION (72 PIN)

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

(1) 512K x 36

NONE

NONE

NONE

4MB

(1) 512K x 36

(1) 512K x 36

NONE

NONE

4MB

(1) 1M x 36

NONE

NONE

NONE

6MB

(1) 512K x 36

(1) 1M x 36

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

8MB

(1) 2M x 36

NONE

NONE

NONE

10MB

(1) 512K x 36

(1) 2M x 36

NONE

NONE

12MB

(1) 1M x 36

(1) 2M x 36

NONE

NONE

12MB

(1) 512K x 36

(1) 512K x 36

(1) 2M x 36

NONE

14MB

(1) 512K x 36

(1) 1M x 36

(1) 2M x 36

NONE

16MB

(1) 2M x 36

(1) 2M x 36

NONE

NONE

16MB

(1) 4M x 36

NONE

NONE

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 2M x 36

NONE

18MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

NONE

20MB

(1) 512K x 36

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

20MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

NONE

22MB

(1) 512K x 36

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

24MB

(1) 1M x 36

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

NONE

26MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

28MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

(1) 8M x 36

NONE

NONE

NONE

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

NONE

Note: This board was manufactured with either 8 banks of 30 pin SIMM sockets or 4 banks of 72 pin SIMM sockets. Mainboard drawing depicts 72 pin SIMM sockets. If mainboard has 72 pin SIMM sockets, use the above table.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP20

JP21

JP27

JP28

JP29

JP35

JP36

JP38

JP40

64KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

256KB

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

512KB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP15

JP16

JP17

80486SX

Open

Pins 2 & 3 closed

Open

80486DX

Closed

Pins 1 & 2 closed

Closed

OVERDRIVE/80486SX CONFIGURATION

Type

JP12

Both sockets enabled

Open

 

80486SX disabled

Pins 1 & 2 closed

 

Overdrive disabled

Pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

JP8

JP19

JP50

25MHz

Closed

Pins 1 & 2 closed

N/A

33MHz

Closed

Pins 1 & 2 closed

N/A

50iMHz

Open

Pins 2 & 3 closed

N/A

50MHz

N/A

N/A

Closed

66iMHz

Open

Pins 2 & 3 closed

N/A

66MHz

N/A

N/A

Open

VESA SYSTEM SPEED CONFIGURATION

CPU speed

JP4

< 33MHz

Open

>= 33MHz

Closed

VESA WAIT STATE

Setting

JP5

JP6

JP10

0 wait states

Open

Open

Open

1 wait state

Closed

Closed

Closed

GREEN PC IRQ DETECTION

IRQ

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

IRQ3

Off

Off

On

Off

Off

Off

IRQ4

Off

Off

Off

Off

On

Off

IRQ6

Off

Off

Off

Off

Off

On

IRQ10

On

Off

Off

Off

Off

Off

IRQ11

Off

On

Off

Off

Off

Off

IRQ14

Off

Off

Off

On

Off

Off

IRQ CONFIGURATION

IRQ

SJ1

SJ2

IRQ5 & IRQ7

Pins 1 & 2 closed

Pins 1 & 2 closed

 

IRQ12 & IRQ15

Pins 2 & 3 closed

Pins 2 & 3 closed

EXTENDED READY SIGNAL CONFIGURATION

CPU Speed

JP3

JP45

> 33mhz (RDY1)

Pins 2 & 3 closed

Closed

< 25mhz (RDY2)

Pins 1 & 2 closed

Open

FRONT PANEL PIN OUT CONFIGURATION

Pin

Assignment

1

Ground

2

Power LED

3

Hard drive LED

4

Not used

5

Power

6

Ground

7

Turbo LED

8

Keyboard inhibit

9

Power

10

Reset switch