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VLSI-286

UNIDENTIFIED

VLSI-286

Processor

80286

Processor Speed

12MHz

Chip Set

VLSI

Max. Onboard DRAM

4MB

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J3

Turbo switch

J20

Speaker

J18

Power LED & keylock

J21

Reset switch

J19

Turbo LED

J22

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP1

Closed

 

Monitor type select monochrome

JP1

Open

Battery type select internal

J3

pins 2 & 3 closed

 

Battery type select external

J3

Closed

BIOS wait state select 1 wait state

JP6

Open

 

BIOS wait states select 2 wait states

JP6

Closed

Oscillator select Y2

JP9

pins 1 & 2 closed

 

Oscillator select Y1

JP9

pins 2 & 3 closed

BIOS type select 27256

JP14

Closed

 

BIOS type select 27128

JP14

Open

DRAM wait state select 0 wait states

JP13

Closed

 

DRAM wait state select 1 wait states

JP13

Open

CPU speed select switchable at keyboard

J20

pins 1 & 2 closed

 

CPU speed select forced high

J20

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

P-0

Bank 1

P-1

Bank 2

Bank 3

512KB

(4) 44256

(2) 41256

NONE

NONE

NONE

NONE

640KB

(4) 44256

(2) 41256

(16) 4164

(2) 4164

NONE

NONE

1MB

(4) 44256

(2) 41256

NONE

(2) 41256

(4) 44256

NONE

2MB

NONE

(2) 411000

NONE

NONE

NONE

(16) 411000

4MB

NONE

(2) 411000

(16) 411000

(2) 411000

NONE

(16) 411000

DRAM JUMPER CONFIGURATION

Size

JP3

JP4

JP5

512KB

Closed

Closed

Closed

640KB

Closed

Closed

Open

1MB

Closed

Open

Closed

2MB

Closed

Open

Open

4MB

Open

Closed

Closed