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





P386 MAINBOARD

UNIDENTIFIED

P386 MAINBOARD

Processor

80386

Processor Speed

20/25MHz

Chip Set

C & T

Video Chip Set

None

Maximum Onboard Memory

16MB (8 MB on external memory card)

Maximum Video Memory

None

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

External memory card

NPU Options

80287/80387

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard connector

J2

Turbo LED

J16

External battery

J3

Speaker

J17

Reset switch

J10

Power LED & keylock

J18

Turbo switch

J15

External memory card

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

CMOS memory normal operation

J4

Open

 

CMOS memory clear

J4

Closed

 

Monitor type select color

J5

Pins 1 & 2 closed

 

Monitor type select monochrome

J5

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Start Bank

Bank 0

Bank 1

Bank 2

Bank 3

1MB (A)

SIP

(4) 256K x 9

None

None

None

1MB (B)

DIP

None

None

(8) 44256

None

2MB (A)

SIP

(4) 256K x 9

(4) 256K x 9

None

None

2MB (B)

DIP

None

None

(8) 44256

(8) 44256

4MB (A)

SIP

(4) 256K x 9

(4) 256K x 9

(8) 44256

(8) 44256

4MB (B)

DIP

(4) 256K x 9

(4) 256K x 9

(8) 44256

(8) 44256

4MB (C)

SIP

(4) 1M x 9

None

None

None

8MB

SIP

(4) 1M x 9

(4) 1M x 9

None

None

10MB (A)

SIP

(4) 1M x 9

(4) 1M x 9

(8) 44256

(8) 44256

10MB (B)

DIP

(4) 1M x 9

(4) 1M x 9

(8) 44256

(8) 44256

DRAM PARITY CONFIGURATION

Size

Start Bank

P 2

P 3

1MB (A)

SIP

None

None

1MB (B)

DIP

(4) 41256

None

2MB (A)

SIP

None

None

2MB (B)

DIP

(4) 41256

(4) 41256

4MB (A)

SIP

(4) 41256

(4) 41256

4MB (B)

DIP

(4) 41256

(4) 41256

4MB (C)

SIP

None

None

8MB

SIP

None

None

10MB (A)

SIP

(4) 41256

(4) 41256

10MB (B)

DIP

(4) 41256

(4) 41256

DRAM JUMPER CONFIGURATION

Size

J6

J7

J8

J9

1MB (A)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

1MB (B)

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

2MB (A)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

2MB (B)

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

4MB (A)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

4MB (B)

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

4MB (C)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

8MB

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

10MB (A)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

10MB (B)

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

2 & 3, 4 & 5

Note: Pins designated should be in the closed position.

NPU SELECTION

Setting

J11

J12

None

Pins 2 & 3 closed

Open

80287

Pins 2 & 3 closed

Open

80387

Pins 1 & 2 closed

Closed