ILON USA, INC.

M-423

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/50(internal)MHz

Chip Set

PC Chips

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Power LED & keylock

JP20

Reset switch

JP17

Speaker

JP21

Turbo LED

JP18

Weitek 4167 connector

W1

Turbo switch

JP19

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

»

Gate type select fast A20

JP3

pins 1 & 2 closed

 

Gate type select keyboard A20

JP3

pins 2 & 3 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

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

None

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

NONE

(1) 8K x 8

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 WRITE-THROUGH CONFIGURATION

Size

JP4

JP6

JP11

JP12

JP13

32KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

64KB

1 & 2

2 & 3

1 & 2

1 & 2

2 & 3

128KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in closed position.

CACHE JUMPER WRITE-BACK CONFIGURATION

Size

JP7

JP8

JP9

JP10

32KB

1 & 2

2 & 3

2 & 3

2 & 3

64KB

2 & 3

2 & 3

2 & 3

1 & 2

128KB

2 & 3

2 & 3

1 & 2

2 & 3

256KB

2 & 3

1 & 2

2 & 3

2 & 3

Note: Pins designated should be in closed position.

CPU TYPE CONFIGURATION

Type

JP14

JP15

JP16

80486SX

pins 2 & 3 closed

Open

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

80486DX2

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

CPU SPEED CONFIGURATION

Speed

JP5

20MHz

pins 1 & 2 closed

25MHz

pins 2 & 3 closed

33MHz

pins 1 & 2 closed

50iMHz

pins 2 & 3 closed