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





IT486EX VER. 1

INFORMTECH INTERNATIONAL, INC.

IT486EX VER. 1

Processor

80486SX/80486DX

Processor Speed

25/33MHz

Chip Set

Intel

Max. Onboard DRAM

64MB

Cache

64/128KB (with external cache card)

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo switch

P1

Reset switch

P4

Turbo LED

P2

Power LED & keylock

P5

Speaker

P3

External battery

P20

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Cache write protect disabled

J5

Closed

 

Cache write protect enabled

J5

Open

On board DRAM access enabled

J8

Closed

 

On board DRAM access disabled

J8

Open

I/O recovery time select 8-bit = 11BLCK, 16-bit = 3BLCK

J16

Closed

 

No recovery time

J16

Open

80486 internal cache enabled

J17

Closed

 

80486 internal cache disabled

J17

Open

Turbocache486 enabled

J20

Closed

 

Turbocache486 disabled

J20

Open

BIOS duplicated (to 00FF0000 hex)

J36

Closed

 

BIOS not duplicated

J36

Open

Turbo mode enabled

P1

Open

 

Turbo mode disabled

P1

Closed

Factory configured - do not alter

SW1/7

Off

Monitor type select monochrome

SW1/8

Off

 

Monitor type select color

SW1/8

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

10MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

10MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

34MB

(4) 4M x 9

(4) 4M x 9

(4) 256K x 9

(4) 256K x 9

34MB

(4) 256K x 9

(4) 256K x 9

(4) 4M x 9

(4) 4M x 9

40MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

40MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

MEMORY BANK CONFIGURATION (BANK 0 & 1)

SIMM Type

SW1/1

SW1/2

No memory installed

Off

Off

256KB

On

Off

1MB

Off

On

4MB

On

On

MEMORY BANK CONFIGURATION (BANK 2 & 3)

SIMM Type

SW1/3

SW1/4

No memory installed

Off

Off

256KB

On

Off

1MB

Off

On

4MB

On

On

MEMORY SPEED/CPU MHZ CONFIGURATION (25MHZ)

SIMM Type

SW1/5

SW1/6

256KB

Off

Off

1MB

On

On

4MB

On

On

Note: SW1/5 corresponds to Banks 0 & 1 and SW1/6 corresponds to Banks 2 & 3.

MEMORY SPEED/CPU MHZ CONFIGURATION (33MHZ)

SIMM Type

SW1/5

SW1/6

256KB

Off

Off

1MB

On

On

4MB

Off

Off

Note: SW1/5 corresponds to Banks 0 & 1 and SW1/6 corresponds to Banks 2 & 3.

TURBOCACHE486 CONFIGURATION

Module

J17

J18

J19

82485ES

Open

Open

Open

82485MA/MB

Closed

Closed

Closed

TURBOCACHE486 JUMPER CONFIGURATION

Module

J1

J2

J29

J63

82485ES

Open

Open

Open

Open

82485MA/MB

Closed

Closed

Closed

Closed

CPU SPEED CONFIGURATION

Speed

J3

J15

25MHz

pins 2 & 3 closed

Closed

33MHz

pins 1 & 2 closed

Open

BATTERY TYPE CONFIGURATION

Battery type

J64

4.5V (without internal current limiting resistor)

pins 3 & 4 closed

3.6V-4.5V (with internal current limiting resistor)

pins 1 & 3 closed

6V (without internal current limiting resistor)

pins 2 & 4 closed

6V (with internal current limiting resistor)

pins 1 & 2 closed

BIOS CONTROL CONFIGURATION

ROM type

J25

J35

28F512

Closed

Closed

28F010

Closed

Open

27C512

Open

Closed

27C010

Open

Open