...because we can't all be on the bleeding edge...





486/25

MICRONICS COMPUTERS, INC.

486/25

Processor

80486DX

Processor Speed

25MHz

Chip Set

Micronics

Max. Onboard DRAM

16MB

Cache

64/128/256KB

BIOS

Phoenix

Dimensions

355mm x 304mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J2

Reset switch

W4

Speaker

J22

Turbo LED

W5

Power LED & keylock

J23

Turbo switch

W6

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Internal cache enabled

SW1/1

On

 

Internal cache disabled

SW1/1

Off

On board BIOS enabled

SW1/2

Off

 

External BIOS enabled

SW1/2

On

Factory configured - do not alter

SW1/3

On

External cache enabled

SW1/4

On

 

External cache disabled

SW1/4

Off

BIOS relocation disabled

SW1/5

Off

 

BIOS relocation enabled

SW1/5

On

Factory configured - do not alter

SW1/6

Off

Monitor type select color, CGA, EGA, or VGA

SW1/7

On

 

Monitor type select monochrome

SW1/7

Off

Factory configured - do not alter

SW1/8

Off

Factory configured - do not alter

SW2/5

Off

D00000-EFFFFF cacheable

SW2/6

Off

 

D00000-EFFFFF non-cacheable

SW2/6

On

Factory configured - do not alter

W1

N/A

Factory configured - do not alter

W2

pins 2 & 3 closed

Factory configured - do not alter

W3

N/A

Note:The exact location of W2 is unknown.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

SW1/1

SW1/2

SW1/3

SW1/4

1MB

(4)256K x 9

NONE

NONE

NONE

On

On

On

On

2MB

(4)256K x 9

(4)256K x 9

NONE

NONE

Off

On

On

On

3MB

(4)256K x 9

(4)256K x 9

(4)256K x 9

NONE

On

Off

On

On

4MB

(4)256K x 9

(4)256K x 9

(4)256K x 9

(4)256K x 9

Off

Off

On

On

4MB

(4)1M x 9

NONE

NONE

NONE

On

On

Off

On

5MB

(4)256K x 9

(4)1M x 9

NONE

NONE

On

On

Off

Off

6MB

(4)256K x 9

(4)256K x 9

(4)1M x 9

NONE

On

Off

On

Off

7MB

(4)256K x 9

(4)256K x 9

(4)256K x 9

(4)1M x 9

Off

On

On

Off

8MB

(4)1M x 9

(4)1M x 9

NONE

NONE

Off

On

Off

On

9MB

(4)256K x 9

(4)1M x 9

(4)1M x 9

NONE

On

Off

Off

Off

10MB

(4)256K x 9

(4)256K x 9

(4)1M x 9

(4) 1M x 9

Off

Off

On

Off

12MB

(4)1M x 9

(4)1M x 9

(4)1M x 9

NONE

On

Off

Off

On

13MB

(4)256K x 9

(4)1M x 9

(4)1M x 9

(4)1M x 9

Off

Off

Off

Off

16MB

(4)1M x 9

(4)1M x 9

(4)1M x 9

(4)1M x 9

Off

Off

Off

On

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 32K x 8

128KB

(4) 32K x 8

NONE

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

Note:The exact location of the TAG chip is unknown.

CACHE JUMPER CONFIGURATION

Size

SW2/7

SW2/8

W8

W9

64KB

Off

Off

pins 1 & 2 closed

pins 1 & 2 closed

128KB

On

On

pins 2 & 3 closed

pins 1 & 2 closed

256KB

Off

On

pins 2 & 3 closed

pins 2 & 3 closed