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





452S

UNIDENTIFIED

452S

Processor

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

Processor Speed

25/33/40/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Reset switch

J5

Speaker

J2

External battery

JP13

Turbo LED

J3

32-bit VESA local bus slots

SL1 - SL3

Turbo switch

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP12

Open

 

Monitor type select color

JP12

Closed

CMOS memory normal operation

JP14

Open

 

CMOS memory clear

JP14

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

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

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 16K x 8 or (1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP9

JP10

64KB

Open

Open

128KB

Closed

pins 1 & 2 closed

256KB

Closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP1

JP2

JP3

80486SX

Open

pins 2 & 3 closed

Open

80487SX

Closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX/DX2

Closed

pins 1 & 2 closed

pins 1 & 2 closed

Pentium Overdrive

Closed

pins 1 & 2 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Type

JS1

JS2

JS3

25MHz

Open

Open

Closed

33MHz

Closed

Open

Open

40MHz

Closed

Closed

Open

50iMHz

Open

Open

Closed

50MHz

Open

Closed

Open

66iMHz

Closed

Open

Open

VESA WAIT STATE CONFIGURATION

Wait states

JP16

0 wait states

pins 1 & 2 closed

1 wait state

pins 2 & 3 closed

BUS SPEED CONFIGURATION

CPU speed

JP15

<= 33MHz

pins 1 & 2 closed

> 33MHz

pins 2 & 3 closed