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ENTERPRISE III (VERSION 2)

AMERICAN MEGATRENDS, INC.

ENTERPRISE III (VERSION 2)

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2/ODP586SX

Processor Speed

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

Chip Set

AMI

Max. Onboard DRAM

256MB

Cache

256KB

BIOS

AMI

Dimensions

355mm x 304mm

I/O Options

32-bit VESA local bus slots (2), PS/2 mouse port (2)

NPU Options

NONE

 

 

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

D5

Power LED & keylock

J10

Diagnostic LED

J1

Turbo switch

J14

PS/2 mouse port

J3

10-pin PS/2 mouse connector

J100

Speaker

J8

32-bit VESA Local bus slot

S1

Reset switch

J9

32-bit VESA Local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Flash BIOS disabled

J2

Open

 

Flash BIOS enabled

J2

Closed

CPU type select 80486DX

J7

Pins 1 & 2, 3 & 4 closed

 

CPU type select 80486SX

J7

Pins 2 & 3 closed

PS/2 mouse enabled

J12

Pins 1 & 2 closed

 

PS/2 mouse disabled

J12

Pins 2 & 3 closed

CPU priority select low

J19

Pins 1 & 2 closed

 

CPU priority select high

J19

Pins 2 & 3 closed

Local bus ID >=33MHz

J30

Pins 1 & 2 closed

 

Local bus ID <=33MHz

J30

Pins 2 & 3 closed

Factory configured - do not alter

SW1/1

Off

 

Monitor type select monochrome

SW1/2

Off

 

Monitor type select CGA

SW1/2

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

10MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

18MB

(4) 256K x 9

(4) 256K x 9

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

NONE

40MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

NONE

NONE

128MB

(4) 16M x 9

(4) 16M x 9

NONE

NONE

192MB

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

NONE

256MB

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

CPU SPEED SELECT

Speed

J20

J21

J24

20MHz

Closed

Open

Open

25MHz

Open

Open

Open

33MHz

Open

Open

Open

50I Mhz

Open

Open

Open

50MHz

Open

Open

Open

66I MHz

Open

Open

Open