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80486 ASIC EISA

MICRONICS COMPUTERS, INC.

80486 ASIC EISA

Processor

80486DX/80486DX2

Processor Speed

25/33/50(internal)MHz

Chip Set

Micronics

Max. Onboard DRAM

64MB

Cache

64/256KB

BIOS

Phoenix

Dimensions

355mm x 302mm

I/O Options

32-bit external memory card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External keyboard

J1

Speaker

J22

Parallel port

J4

Power LED & keylock

J23

Serial port COM1

J5

Reset switch

W5

Serial port COM2

J15

Turbo switch

W6

Floppy drive interface

J17

Turbo LED

W7

External battery

J18

Local bus expansion slot

S1

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

Factory configured - do not alter

W8

pins 1 & 2 closed

»

Factory configured - do not alter

W10

pins 2 & 3 closed

»

Factory configured - do not alter

W11

pins 2 & 3 closed

»

Factory configured - do not alter

W12

pins 1 & 2 closed

»

Floppy drive interface enabled

W13

pins 1 & 2 closed

 

Floppy drive interface disabled

W13

pins 2 & 3 closed

»

CPU type select 80486DX-33

W43

Open

 

CPU type select 80486DX2-50

W43

pins 1 & 2 closed

»

Factory configured - do not alter

W45

pins 1 & 2 closed

»

Factory configured - do not alter

SW1/6

On

»

Factory configured - do not alter

SW1/7

Off

»

Monitor type select color

SW1/8

On

 

Monitor type select monochrome

SW1/8

Off

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) 1 M 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

16MB

(4) 4M x 9

NONE

NONE

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

28MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

52MB

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

DRAM SWITCH CONFIGURATION

Size

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

1MB

On

On

On

On

On

2MB

Off

On

On

On

On

3MB

On

Off

On

On

On

4MB 1

Off

Off

On

On

On

4MB 2

On

On

Off

On

On

5MB

On

On

Off

Off

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 1

Off

Off

Off

On

On

16MB 3

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

Note 1 :Use this setting when banks are populated with (4) 256K x 9 SIMMs

Note 2 :Use this setting when banks are populated with (4) 1M x 9 SIMMs

Note 3 :Use this setting when banks are populated with (4) 4M x 9 SIMMs

CACHE CONFIGURATION

Size

Bank 0

64KB

(8) 8K x 8

256KB

(8) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W20

W21

W41

W44

64KB

pins 2 & 3 closed

Open

Open

Open

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

PARALLEL PORT CONFIGURATION

Size

W3

W4

LPT1

pins 1 & 2 closed

pins 2 & 3 closed

LPT2

pins 1 & 2 closed

pins 1 & 2 closed

LPT3

pins 2 & 3 closed

pins 1 & 2 closed

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

SERIAL COM PORT CONFIGURATION

Size

W2

W9

COM1 (J5) and COM2 (J15) enabled

pins 1 & 2 closed

pins 1 & 2 closed

COM1 (J5) enabled and COM2 (J15) disabled

pins 1 & 2 closed

pins 2 & 3 closed

COM1 (J5) disabled and COM2 (J15) enabled

pins 2 & 3 closed

pins 1 & 2 closed

COM1 (J5) and COM2 (J15) disabled

pins 2 & 3 closed

pins 2 & 3 closed