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NEAT-286 (VER. 2)

UNIDENTIFIED

NEAT-286 (VER. 2)

Processor

80286

Processor Speed

16/20MHz

Chip Set

Neat

Video Chip Set

None

Maximum Onboard Memory

8MB

Maximum Video Memory

None

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

External memory card

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo switch

JP7

Speaker

J2

Turbo LED

LF1

External battery

J3

External memory card

SL1

Reset switch

JP1

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

NPU asynchronous with CPU

JP2

Pins 1 & 2 closed

 

NPU synchronous with CPU

JP2

Pins 2 & 3 closed

 

BIOS type select 27128

JP4

Pins 1 & 2 closed

 

BIOS type select 27256

JP4

Pins 2 & 3 closed

 

CPU = CPU speed

JP5

Pins 1 & 2 closed

 

CPU = NPU OSC speed

JP5

Pins 2 & 3 closed

 

Monitor type select color

JP6

Closed

 

Monitor type select monochrome

JP6

Open

DRAM CONFIGURATION

Size

Bank A

Bank B

Bank C

Bank D

512KB

(18) 41256

None

None

None

640KB

(18) 41256

(18) 4164

None

None

1MB

(18) 41256

(18) 41256

None

None

1.5MB

(18) 41256

(18) 41256

(2) 256K x 9

None

1.64MB

(18) 41256

(18) 4164

(2) 256K x 9

(2) 256K x 9

2MB

(18) 411000

None

None

None

2MB

(18) 41256

(18) 41256

(2) 256K x 9

(2) 256K x 9

3MB

(18) 41256

(18) 41256

(2) 1M x 9

None

4MB

(18) 411000

(18) 411000

None

None

4.64MB

(18) 41256

(18) 4164

(2) 1M x 9

(2) 1M x 9

5MB

(18) 41256

(18) 41256

(2) 1M x 9

(2) 1M x 9

6MB

(18) 411000

(18) 411000

(2) 1M x 9

None

8MB

(18) 411000

(18) 411000

(2) 1M x 9

(2) 1M x 9

DRAM JUMPER CONFIGURATION

Setting

JP3

Banks C & D = Bank 0

Banks A & B = Bank 1

1 & 2, 3 & 4, 6 & 7, 11 & 12, 13 & 14, 16 & 17, 18 & 19, 23 & 24, 28 & 29

Banks A & B = Bank 0

Banks C & D = Bank 1

2 & 3, 4 & 5, 7 & 8, 9 & 10, 12 & 13, 14 & 15, 17 & 18, 19 & 20, 22 & 23, 24 & 25, 27 & 28, 29 & 30

Note: Pins designated should be in the closed position.