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MS-4131 VLB 486 AL2

ACHME COMPUTER, INC.

MS-4131 VLB 486 AL2

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

ALI

Max. Onboard DRAM

112MB

Cache

128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JB

32-bit VESA Local bus slot

S2

32-bit VESA Local bus slot

S1

32-bit VESA Local bus slot

S3

PIN OUT CONFIGURATION

Connector

JFP

Keylock

pins 1 & 2 closed

Power LED

pins 3 & 5 closed

Turbo LED

pins 12 & 13 closed

Turbo switch

pins 15, 16, & 17 closed

Reset

pins 19 & 20 closed

Speaker

pins 7, 8, 9, & 10 closed

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JC1

pins 1 & 2 closed

Factory configured - do not alter

JC2

pins 1 & 2 closed

Factory configured - do not alter

JC3

pins 1 & 2 closed

Factory configured - do not alter

JC5

Closed

Factory configured - do not alter

JC7

pins 1 & 2 closed

CPU PQFP not installed

JC8

Closed

 

CPU PQFP installed

JC8

Open

Factory configured - do not alter

JC9

N/A

Factory configured - do not alter

JC10

Open

Monitor type select monochrome

JP1

pins 1 & 2 closed

 

Monitor type select color

JP1

pins 2 & 3 closed

Factory configured - do not alter

JP4

N/A

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

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

256KB

(4) 32K x 8

(4) 32K x 8

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

CACHE JUMPER CONFIGURATION

Size

JS1

JS2

64KB

pins 2 & 3 closed

pins 2 & 3 closed

128KB

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 1 & 2 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JC4

JC6

80486SX

pins 1 & 2 closed

Open

80487SX

pins 2 & 3 closed

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

80486DX2

pins 2 & 3 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

JK1

JK2

JK3

JK4

JP2

25MHz

3 & 7 and 4 & 8

pins 1 & 2

pins 1 & 2

Closed

pins 1 & 2

33MHz

1 & 2 and 4 & 8

pins 1 & 2

pins 1 & 2

Closed

pins 1 & 2

40MHz

1 & 5 and 2 & 6

pins 2 & 3

pins 2 & 3

Closed

pins 2 & 3

50i MHz

3 & 7 and 4 & 8

pins 1 & 2

pins 1 & 2

Closed

pins 1 & 2

50MHz

pins 2 & 6

pins 2 & 3

pins 2 & 3

Open

pins 2 & 3

66i MHz

1 & 2 and 4 & 8

pins 1 & 2

pins 1 & 2

Closed

pins 1 & 2

Note:Pins designated should be in the closed position.

VESA WAIT STATE/BUS SPEED CONFIGURATION

CPU speed

Wait states

JP4/pins 1 & 2

JP4/pins 3 & 4

<= 33MHz

0 wait states

Open

Open

> 33MHz

1 wait state

Closed

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

None

None

4MB

None

(1) 1M x 36

None

4MB

None

None

(1) 1M x 36

4MB

(4) 1M x 9

None

None

5MB

(4) 256K x 9

(1) 1M x 36

None

5MB

(4) 256K x 9

None

(1) 1M x 36

8MB

None

(1) 1M x 36

(1) 1M x 36

8MB

None

(1) 2M x 36

None

8MB

None

None

(1) 2M x 36

9MB

(4) 256K x 9

(1) 2M x 36

None

9MB

(4) 256K x 9

None

(1) 2M x 36

12MB

(4) 1M x 9

(1) 2M x 36

None

12MB

(4) 1M x 9

None

(1) 2M x 36

16MB

(4) 4M x 9

None

None

16MB

(4) 4M x 9

(1) 1M x 36

None

16MB

None

(1) 2M x 36

(1) 2M x 36

16MB

(4) 4M x 9

None

(1) 1M x 36

24MB

(4) 4M x 9

(1) 2M x 36

None

24MB

(4) 4M x 9

None

(1) 2M x 36

32MB

None

(1) 4M x 36

None

32MB

None

None

(1) 4M x 36

33MB

(4) 256K x 9

(1) 4M x 36

None

33MB

(4) 256K x 9

None

(1) 4M x 36

36MB

(4) 1M x 9

(1) 4M x 36

None

36MB

(4) 1M x 9

None

(1) 4M x 36

48MB

(4) 4M x 9

(1) 4M x 36

None

48MB

(4) 4M x 9

None

(1) 4M x 36

DRAM CONFIGURATION (CONT.)

Size

Bank 0

Bank 1

Bank 2

64MB

None

(1) 8M x 36

None

64MB

None

(1) 4M x 36

(1) 4M x 36

64MB

None

None

(1) 8M x 36

65MB

(4) 256K x 9

None

(1) 8M x 36

65MB

(4) 256K x 9

(1) 8M x 36

None

68MB

(4) 1M x 9

(1) 8M x 36

None

68MB

(4) 1M x 9

None

(1) 8M x 36

88MB

(4) 4M x 9

None

(1) 8M x 36

88MB

(4) 4M x 9

(1) 8M x 36

None

96MB

None

(1) 8M x 36

(1) 4M x 36

97MB

(4) 256K x 9

(1) 8M x 36

(1) 4M x 36

100MB

(4) 1M x 9

(1) 8M x 36

(1) 4M x 36

112MB

(4) 4M x 9

(1) 8M x 36

(1) 4M x 36