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





386-20/25

UNIDENTIFIED

386-20/25

Processor

80386SX (exact location unidentified)

Processor Speed

20/25MHz

Chip Set

Unidentified

Maximum Onboard Memory

10MB (on external memory card)

Cache

None

BIOS

Unidentified

Dimensions

228mm x 220mm

I/O Options

External memory card

NPU Options

80387SX (exact location unidentified)

CONNECTIONS

Function

Label

Function

Label

External battery

X1

Turbo LED

x8

Reset switch

X4

Speaker

X17

Status port

X5

Turbo switch

X22

Power LED & keylock

x6

External memory card

SL1

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Speed select through keyboard

S1

Pins 2 & 3 closed

 

Speed select through turbo switch

S1

Pins 1 & 2 closed

I/O slot wait state select 4 wait states

S2

Pins 1 & 2 closed

 

I/O slot wait state select 6 wait states

S2

Pins 2 & 3 closed

Factory configured - do not alter

S5

N/A

Factory configured - do not alter

SW1/1

N/A

NPU disabled

SW1/2

Off

 

NPU enabled

SW1/2

On

Floppy drive speed does not affect CPU speed

SW1/3

Off

 

Floppy drive speed at CPU speed 8MHz

SW1/3

On

Monitor type select monochrome

SW1/4

Off

 

Monitor type select color

SW1/4

On

Factory configured - do not alter

X23

N/A

DRAM

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

1MB kit

None

None

None

1MB

1MB kit

None

None

None

2MB

1MB kit

None

1MB kit

None

2MB

1MB kit

None

1MB kit

None

4MB

None

4MB kit

None

None

5MB

1MB kit

4MB kit

None

None

6MB

1MB kit

4MB kit

1MB kit

None

6MB

1MB kit

4MB kit

1MB kit

None

8MB

None

4MB kit

None

4MB module

9MB

1MB kit

4MB kit

None

4MB module

10MB

1MB kit

4MB kit

1MB kit

4MB module

10MB

1MB kit

4MB kit

1MB kit

4MB module

Note: Banks are located on the external memory card.

DRAM SWITCH

Size

SW1/5

SW1/6

SW1/7

SW1/8

1MB

On

On

On

On

1MB

On

On

On

Off

2MB

On

On

Off

On

2MB

On

On

Off

Off

4MB

On

Off

On

On

5MB

On

Off

On

Off

6MB

On

Off

Off

On

6MB

On

Off

Off

Off

8MB

Off

On

On

On

9MB

Off

On

On

Off

10MB

Off

On

Off

On

10MB

Off

On

Off

Off

BIOS

Setting

S3

S4

27128

Pins 1 & 2 closed

Pins 1 & 2 closed

27256

Pins 2 & 3 closed

Pins 1 & 2 closed

27512

Pins 2 & 3 closed

Pins 2 & 3 closed

MISCELLANEOUS TECHNICAL NOTE

The location of pin 1 on all jumpers and the switch is unidentified.