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AT-TURBO 286 1800

PC CALC, INC.

AT-TURBO 286 1800

Processor

80286

Processor Speed

15MHz

Chip Set

None

Max. Onboard DRAM

1MB

Cache

None

BIOS

Phoenix

Dimensions

355mm x 304mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J19

Turbo switch

J25

Power LED & keylock

J20

Turbo LED

J27

Reset switch

J24

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

DRAM select 1 wait state

E1

Open

 

DRAM select 0 wait states

E1

Closed

NPU speed select high

J29

pins 1 & 2 closed

 

NPU speed select low

J29

pins 2 & 3 closed

Monitor type select color

SW1

Closed

 

Monitor type select monochrome

SW1

Open

BIOS type select 27128

U57

pins 1 & 8, 2 & 7 closed

 

BIOS type select 27256

U57

pins 3 & 6, 4 & 5 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(18) 41256

NONE

640KB

(18) 41256

(18) 4164

1MB

(18) 41256

(18) 41256

DRAM JUMPER CONFIGURATION

Size

J17

J18

512KB

pins 2 & 3 closed

pins 2 & 3 closed

640KB

pins 2 & 3 closed

pins 1 & 2 closed

1MB (640KB base/384KB extended)

pins 1 & 2 closed

pins 1 & 2 closed

1MB (512KB base/512KB extended)

pins 1 & 2 closed

pins 2 & 3 closed

EXTERNAL BATTERY CONFIGURATION

Size

J22

J31

Lithium

Closed

Open

Rechargeable

Closed

Closed