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IT486SQ

INFORMTECH INTERNATIONAL, INC.

IT486SQ

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

20/25/33/50(internal)/66(internal)MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

None

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo LED

J5

Keyboard connector

J2A

Power LED & keylock

J19

Reset switch

J3

Speaker

J20

Turbo switch

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select - CGA, EGA, VGA

JP2

Closed

 

Monitor type select - monochrome

JP2

Open

I/O recovery time enabled

JP13

pins 2 & 3 closed

 

I/O recovery time disabled

JP13

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CPU TYPE CONFIGURATION

CPU Type

JP9

JP10

JP11

80486SX

pins 1 & 2 closed

Open

Open

80486DX

pins 2 & 3 closed

Closed

pins 2 & 3 closed

P24

pins 2 & 3 closed

Closed

pins 1 & 2 closed

SYSTEM CLOCK CONFIGURATION

System Clock

JP5

20MHz

pins 1 & 2 closed

Half of alternative oscillator frequency at OSC3

pins 2 & 3 closed

UPGRADE PROCESSOR TYPE CONFIGURATION

Upgrade processor

JP6

JP7

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

80487SX or other

pins 1 & 2 closed

pins 1 & 2 closed

EXTERNAL BATTERY CONFIGURATION

Battery type

JP3

3.6V Lithium battery **

pins 1 & 2 closed

4.5V Alkaline Battery

pins 2 & 4 closed

6V (4 AA) Battery pack

pins 3 & 4 closed

6V Battery pack **

pins 1 & 3 closed

Note:** with internal series current limiting resistor.