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





80486 ASIC SYSTEM BOARD

MICRONICS COMPUTERS, INC.

80486 ASIC SYSTEM BOARD

Processor

80486DX

Processor Speed

33MHz

Chip Set

Micronics

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery connector

J13

Turbo LED

W9

Speaker

J30

Reset switch

W10

Keylock

J31

Turbo switch

W11

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured-do not alter

SW1/1

Off

Factory configured-do not alter

SW1/2

Off

Factory configured-do not alter

SW1/3

Off

Factory configured-do not alter

SW1/4

Off

Factory configured-do not alter

SW1/5

Off

Factory configured-do not alter

SW1/6

Off

Video BIOS cacheable

SW1/7

Off

 

Video BIOS not cacheable

SW1/7

On

Factory configured-do not alter

SW1/8

Off

70ns DRAM select

SW2/6

Off

 

80ns DRAM select

SW2/6

On

 

64KB or 256KB cache select

SW2/7

Off

 

128KB cache select

SW2/7

On

 

64KB cache select

SW2/8

Off

 

128KB or 256KB cache select

SW2/8

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

W5

W6

128KB or 256KB

Closed

N/A

64KB

Open

N/A

256KB

N/A

Closed

64KB or 128KB

N/A

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256KB x 9

NONE

NONE

NONE

2MB

(4) 256KB x 9

(4) 256KB x 9

NONE

NONE

3MB

(4) 256KB x 9

(4) 256KB x 9

(4) 256KB x 9

NONE

4MB

(4) 256KB x 9

(4) 256KB x 9

(4) 256KB x 9

(4) 256KB x 9

4MB

(4) 1MB X 9

NONE

NONE

NONE

5MB

(4) 256KB x 9

(4) 1MB x 9

NONE

NONE

6MB

(4) 256KB x 9

(4) 256KB x 9

(4) 1MB x 9

NONE

7MB

(4) 256KB x 9

(4) 256KB x 9

(4) 256KB x 9

(4) 1MB x 9

8MB

(4) 1MB x 9

(4) 1MB x 9

NONE

NONE

9MB

(4) 256KB x 9

(4) 1MB x 9

(4) 1MB x 9

NONE

10MB

(4) 256KB x 9

(4) 256KB x 9

(4) 1MB x 9

(4) 1MB x 9

12MB

(4) 1MB x 9

(4) 1MB x 9

(4) 1MB x 9

NONE

13MB

(4) 256KB x 9

(4) 1MB x 9

(4) 1MB x 9

(4) 1MB x 9

DRAM CONFIGURATION (CONTINUED)

Size

Bank 0

Bank 1

Bank 2

Bank 3

16MB

(4) 1MB x 9

(4) 1MB x 9

(4) 1MB x 9

(4) 1MB x 9

16MB

(4) 4MB x 9

NONE

NONE

NONE

20MB

(4) 1MB x 9

(4) 4MB x 9

NONE

NONE

24MB

(4) 1MB x 9

(4) 1MB x 9

(4) 4MB x 9

NONE

28MB

(4) 1MB x 9

(4) 1MB x 9

(4) 1MB x 9

(4) 4MB x 9

32MB

(4) 4MB x 9

(4) 4MB x 9

NONE

NONE

36MB

(4) 1MB x 9

(4) 4MB x 9

(4) 4MB x 9

NONE

40MB

(4) 1MB x 9

(4) 1MB x 9

(4) 4MB x 9

(4) 4MB x 9

48MB

(4) 4MB x 9

(4) 4MB x 9

(4) 4MB x 9

NONE

52MB

(4) 1MB x 9

(4) 4MB x 9

(4) 4MB x 9

(4) 4MB x 9

64MB

(4) 4MB x 9

(4) 4MB x 9

(4) 4MB x 9

(4) 4MB x 9

DRAM SWITCH CONFIGURATION

Size

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

1MB

On

On

On

On

On

2MB

Off

On

On

On

On

3MB

On

Off

On

On

On

4MB

Off

Off

On

On

On

4MB

On

On

Off

On

On

5MB

On

On

Off

On

On

6MB

On

Off

On

Off

On

7MB

Off

On

On

Off

On

8MB

Off

On

Off

On

On

9MB

On

Off

Off

Off

On

10MB

Off

Off

On

Off

On

12MB

On

Off

Off

On

On

13MB

Off

Off

Off

Off

On

16MB

Off

Off

Off

On

On

16MB

On

On

Off

On

Off

20MB

On

On

Off

Off

Off

24MB

On

Off

On

Off

Off

28MB

Off

On

On

Off

Off

32MB

Off

On

Off

On

Off

36MB

On

Off

Off

Off

Off

40MB

Off

Off

On

Off

Off

48MB

On

Off

Off

On

Off

52MB

Off

Off

Off

Off

Off

64MB

Off

Off

Off

On

Off