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





80486-25 ISA

MICRONICS COMPUTERS, INC.

80486-25 ISA

Processor

80486DX

Processor Speed

25MHz

Chip Set

Micronics

Max. Onboard DRAM

16MB

Cache

64/128/256KB

BIOS

Phoenix

Dimensions

350mm 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

BIOS select onboard

SW1/2

Off

 

BIOS select external

SW1/2

On

Factory configured - do not alter

SW1/3

On

Secondary cache enabled

SW1/4

On

 

Secondary cache disabled

SW1/4

Off

Video BIOS shadowing disabled

SW1/5

Off

 

Video BIOS shadowing enabled

SW1/5

On

Factory configured - do not alter

SW1/6

Off

Monitor type select color

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

Address range 14MB to 15MB cacheable

SW2/6

Off

 

Address range 13MB to 15MB Non-cacheable

SW2/6

On

Factory configured - do not alter

W1

pins 1 & 2 closed

Factory configured - do not alter

W2

pins 2 & 3 closed

Video BIOS caching enabled

W3

Open

 

Video BIOS caching disabled

W3

Closed

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

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

7MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

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

13MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

DRAM SWITCH CONFIGURATION

Size

SW2/1

SW2/2

SW2/3

SW2/4

1MB

On

On

On

On

2MB

Off

On

On

On

3MB

On

Off

On

On

4MB

Off

Off

On

On

4MB

On

On

Off

On

5MB

On

On

Off

Off

6MB

On

Off

On

Off

7MB

Off

On

On

Off

8MB

Off

On

Off

On

9MB

On

Off

Off

Off

10MB

Off

Off

On

Off

12MB

On

Off

Off

On

13MB

Off

Off

Off

Off

16MB

Off

Off

Off

On

CACHE CONFIGURATION

Size

Bank 0

Bank 1

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

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