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80286-12

UNIDENTIFIED

80286-12

Processor

80286

Processor Speed

6/8/10/12MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

1MB

Maximum Video Memory

None

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

Reset switch

J4

Power LED & keylock

J2

Turbo LED

JP1

External battery

J3

Turbo switch

JP2

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

BIOS type select 27128

JP3

Pins 1 & 2 closed

 

BIOS type select 27256

JP3

Pins 2 & 3 closed

 

Monitor type select color

SW1/3

On

 

Monitor type select monochrome

SW1/3

Off

DRAM CONFIGURATION

Size

Starting address

Bank 0

Bank 1

256KB

000000H - 03FFFFH

(18) 4164

(18) 4164

512KB

000000H - 07FFFFH

(18) 41256

None

640KB

000000H - 09FFFFH

(18) 41256

(18) 4164

1MB (A)

000000H - 07FFFFH

(18) 41256

(18) 41256

1MB (B)

100000H - 17FFFFH

(18) 41256

(18) 41256

1MB (C)

000000H - 09FFFFH

(18) 41256

(18) 41256

1MB (D)

100000H - 15FFFFH

(18) 41256

(18) 41256

Note: The location of banks 0 & 1 are unidentified.

DRAM SWITCH CONFIGURATION

Size

SW1/1

SW1/2

SW1/4

256MB

On

On

Off

512MB

Off

On

Off

640MB

On

Off

Off

1MB (A)

Off

Off

Off

1MB (B)

Off

Off

Off

1MB (C)

On

Off

On

1MB (D)

On

Off

On