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SEAT 286

UNIDENTIFIED

SEAT 286

Processor

80286

Processor Speed

12/16/20MHz

Chip Set

G-2

Max. Onboard DRAM

8MB (4MB on external memory card)

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

16-bit external memory card

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Optional keyboard connector

J1

Turbo LED

J11

External battery

J4

Reset switch

J13

Power LED & keylock

J10

Speaker

J15

16-bit external memory card

SL1

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Battery select 3.6v internal

J2

Closed

 

Battery select 6V external

J2

Open

Power good signal detect from board

J3

Pins 1 & 2 closed

 

Power good signal detect from power supply

J3

Pins 2 & 3 closed

Monitor type select color

J5

Closed

 

Monitor type select monochrome

J5

Open

BIOS type select 27256

J6

Pins 2 & 3 closed

 

BIOS type select 27128

J6

Pins 1 & 2 closed

Factory configured - do not alter

J7

N/A

Factory configured - do not alter

J8

N/A

Parity check disabled

J9

Pins 2 & 3 closed

 

Parity check enabled

J9

Pins 1 & 2 closed

I/O speed select half

J12/1

On

 

I/O speed select full

J12/1

Off

Extended 384K RAM enabled

J12/4

Off

 

Extended 384K RAM disabled

J12/4

On

DRAM type select 1M x 1

J12/6

On

 

DRAM type select 256K x 4

J12/6

Off

NPU asynchronous with CPU

J14

Pins 2 & 3 closed

 

NPU synchronous with CPU

J14

Pins 1 & 2 closed

Turbo enabled

J16

Open

 

Turbo disabled

J16

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

Bank 4

512KB

(4) 44256

NONE

NONE

NONE

NONE

640KB

(4) 44256

NONE

(4) 4464

NONE

NONE

1MB

(4) 44256

(4) 44256

NONE

NONE

NONE

2MB

NONE

NONE

NONE

(16) 421000

NONE

4MB

NONE

NONE

NONE

(16) 421000

(16) 421000

PARITY CONFIGURATION

Size

P0

P1

P2

P3

512KB

(2) 41256

NONE

NONE

NONE

640KB

NONE

NONE

NONE

NONE

1MB

(2) 41256

(2) 41256

NONE

NONE

2MB

NONE

NONE

(2) 421000

NONE

4MB

NONE

NONE

(2) 421000

(2) 421000

DRAM SWITCH CONFIGURATION

Size

J12/2

J12/3

J12/5

512KB

Off

Off

Off

640KB

Off

Off

On

1MB

On

Off

Off

2MB

Off

Off

Off

4MB

On

Off

Off

8MB

On

On

Off

Note: J12/4 & J12/5 must be ON for 640KB