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M-423

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