...because we can't all be on the bleeding edge...





IT286SB

INFORMTECH INTERNATIONAL, INC.

IT286SB

Processor

80286

Processor Speed

5/6/8/10MHz

Chip Set

C & T

Max. Onboard DRAM

1MB

SRAM Cache

None

BIOS

Unknown

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J13

External battery

J18

Power LED & keylock

J16

Turbo LED

J20

Reset switch

J17

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Power good signal detect from power supply

J23

pins 1 & 2 closed

 

Power good signal detect from board

J23

pins 2 & 3 closed

CPU speed software selectable

SW1

pins 2 & 3 closed

 

CPU speed select 5.33/6.7MHz

SW1

pins 1 & 2 closed

 

CPU speed select 8/10MHz

SW1

open

Monitor type select monochrome

SW2

pins 2 & 3 closed

 

Monitor type select color

SW2

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Jumper W4

Jumper W5

 

256KB

(18) 4164

(18) 4164

pins 1 & 2 closed

pins 1 & 2 closed

 

512KB

(18) 41256

NONE

pins 2 & 3 closed

pins 1 & 2 closed

640KB

(18) 41256

(18) 4164

pins 1 & 2 closed

pins 2 & 3 closed

 

1024KB

(18) 41256

(18) 41256

pins 2 & 3 closed

pins 2 & 3 closed

NPU CLOCK RATE CONFIGUARATION

NPU

Clock Rate

Jumper W7

Jumper W8

80287-6

3.6/5.33MHz

closed

pins 1 & 2 closed

80287-6

4.46MHz

closed

pins 1 & 2 closed

80287-8

5.33/8MHz

open

pins 2 & 3 closed

80287-8

4.46/6.67MHz

closed

pins 1 & 2 closed

80287-10

6.67/10MHz

open

pins 2 & 3 closed

BIOS TYPE CONFIGURATION

BIOS

Size

Jumper W2

Jumper W3

27128

32K EPROM

pins 2 & 3 closed

pins 1 & 2 closed

 

27256

64K EPROM

pins 1 & 2 closed

pins 1 & 2 closed

 

23128

32K MASK ROM

pins 2 & 3 closed

pins 2 & 3 closed

 

23256

64K MASK ROM

pins 1 & 2 closed

pins 2 & 3 closed

BATTERY TYPE CONFIGUARATION

Battery

J21

J22

Internal lithium (2 x 3VDC)

pins 1 & 2 closed

open

 

External lithium (6VDC)

open

closed

 

External alkaline (6VDC)

open

open