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486 VESA (REV. VL 421A/422)

UNIDENTIFIED

486 VESA (REV. VL 421A/422)

Processor

CX486S/80486SX/80487SX/80486DX/80486DX2/P24T

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

Forex

Video Chip Set

None

Maximum Onboard Memory

36MB

Maximum Video Memory

None

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP2

Turbo switch

JP15

Reset switch

JP3

Turbo LED

JP16

Power LED & keylock

JP9

32-bit VESA local bus slots

SL1 & SL2

Speaker

JP10

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Battery type select internal

JP2

Pins 1 & 2 closed

 

Battery type select external

JP2

Closed

Ľ

Factory configured - do not alter

JP5

Unidentified

Ľ

Factory configured - do not alter (CMOS)

JP6

Unidentified

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

None

(4) 256K x 9

None

2MB

None

(4) 256K x 9

(4) 256K x 9

4MB

(8) 411000

None

None

4MB

None

(4) 1M x 9

None

5MB

(8) 411000

(4) 256K x 9

None

5MB

None

(4) 1M x 9

(4) 256K x 9

8MB

(8) 411000

(4) 1M x 9

None

8MB

None

(4) 1M x 9

(4) 1M x 9

12MB

(8) 411000

(4) 1M x 9

(4) 1M x 9

16MB

None

(4) 4M x 9

None

20MB

(8) 411000

(4) 4M x 9

None

32MB

None

(4) 4M x 9

(4) 4M x 9

36MB

(8) 411000

(4) 4M x 9

(4) 4M x 9

Note: The location of banks 1 & 2 are unidentified.

DRAM JUMPER SELECTION

Setting

JP105

DIPPs used as bank 0

Pins 1 & 2 closed

SIMMs used as bank 0

Pins 2 & 3 closed

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) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8A

JP8B

JP8D

JP8E

64KB

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

128KB

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

CPU SPEED SELECTION

Speed

JP7A

JP7B

JP7C

20MHz

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

25MHz

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

33MHz

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

40MHz

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

50iMHz

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

50MHz

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

66iMHz

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

CPU TYPE SELECTION

Type

JP12

JP13

JP29

CX486S

N/A

N/A

N/A

80486 (PQFP)

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

80486SX

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

80487SX

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

80486DX

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

80486DX2

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

P24T

N/A

N/A

N/A

CPU TYPE SELECTION (CONíT)

Type

JP30

JP104

JP109

JP110

CX486S

N/A

N/A

N/A

Pins 1 & 2 closed

80486 (PQFP)

Pins 2 & 3 closed

N/A

N/A

N/A

80486SX

Pins 2 & 3 closed

N/A

N/A

N/A

80487SX

Pins 2 & 3 closed

N/A

N/A

N/A

80486DX

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

80486DX2

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

P24T

N/A

Pins 2 & 3 closed

Pins 2 & 3 closed

N/A

VL BUS WAIT STATE SELECTION

Setting

JP102

JP103

0

Pins 1 & 2 closed

Pins 1 & 2 closed

1

Pins 2 & 3 closed

Pins 2 & 3 closed