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386-20

MICRONICS COMPUTERS, INC.

386-20

Processor

80386DX

Processor Speed

20MHz

Chip Set

Micronics

Max. Onboard DRAM

8MB (on system memory card)

Cache

16KB (on M100C and M400C system memory cards only)

BIOS

Award/Phoenix

Dimensions

355.6mm x 255.4mm

I/O Options

32-bit system memory card slot

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Speaker

J22

32-bit system memory card power

J11

Turbo LED

W7

32-bit system memory card

J20

Reset switch

W9

Power LED & keylock

J21

   

Note:The system memory card is inserted into both J11 & J20.

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

SW1/1

On

 

NPU enabled

SW1/2

On

 

NPU disabled

SW1/2

Off

Factory configured - do not alter

SW1/3

Off

Video BIOS shadowing enabled

SW1/4

On

 

Video BIOS shadowing disabled

SW1/4

Off

Factory configured - do not alter

SW1/5

Off

Monitor type select color

SW1/6

On

 

Monitor type select monochrome

SW1/6

Off

 

Cache enabled

SW1/7

On

 

Cache disabled

SW1/7

Off

Factory configured - do not alter

SW1/8

Off

 

BIOS type select 27128

W1

pins 1 & 2 closed

 

BIOS type select 27256

W1

pins 2 & 3 closed

 

NPU mode select synchronous with CPU

W4

W6

pins 2 & 3 closed

open

 

NPU mode select asynchronous with CPU

W4

W6

pins 1 & 2 closed

closed

Note:Cache configuration applies to main memory boards M100C and M400C only.

SYSTEM MEMORY CARD MODEL M100

CONNECTIONS

Purpose

Location

32-bit piggy back memory card

S1 & S2

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Jumper W1

1MB

(36) 256K x 1

NONE

pins 2 & 3, 4 & 5, 7 & 8 closed

2MB

(36) 256K x 1

(36) 256K x 1

pins 1 & 2, 4 & 5, 7 & 8 closed

CONNECTIONS

Purpose

Location

32-bit piggy back memory card

S1 & S2

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Jumper W1

4MB

(36) 1M x 1

NONE

pins 1 & 2, 3 & 4 closed

8MB

(36) 1M x 1

(36) 1M x 1

pins 3 & 4 closed

SYSTEM MEMORY CARD MODEL M300

CONNECTIONS

Purpose

Location

32-bit piggy back memory card

S1 & S2

DRAM CONFIGURATION

Size

Bank 0

Parity (P-0)

Bank 1

Parity (P-1)

Bank 2

SW1

1MB

(8) 44256

(4) 4464

NONE

NONE

NONE

switches 5, 6, & 8 closed

2MB

(8) 44256

(4) 4464

(8) 44256

(4) 4464

NONE

switches 3, 5, 6, & 8 closed

6MB

(8) 44256

(4) 4464

(8) 44256

(4) 4464

(36) 411000

switches 2, 3, 5, 6, & 8 closed

CONNECTIONS

Purpose

Location

32-bit piggy back memory card

S1 & S2

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Jumper W1

Jumper W3

1MB

(36) 256K x 1

NONE

pins 1 & 2 closed

closed

2MB

(36) 256K x 1

(36) 256K x 1

pins 2 & 3 closed

closed

Note:Jumper W3 enables cache controller chip. Disabling this jumper will decrease system speed.

SYSTEM MEMORY CARD MODEL M400C

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Jumper W1

Jumper W3

4MB

(36) 1M x 1

NONE

pins 1 & 2 closed

closed

8MB

(36) 1M x 1

(36) 1M x 1

pins 2 & 3 closed

closed

Note:Jumper W3 enables cache controller chip. Disabling this jumper will decrease system speed.