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





IT486SL-50MHz Ver. 2.0

INFORMTECH INTERNATIONAL, INC.

IT486SL-50MHz Ver. 2.0

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33/50MHz

Chip Set

OPTI

Max. Onboard DRAM

40MB

SRAM Cache

64/256KB

BIOS

OPTI

Dimensions

218mm x 330mm

I/O Options

Auxiliary keyboard connector

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J11

Turbo LED

JP11

Power LED & keylock

J20

Reset switch

SW1

Speaker

J21

Turbo switch

SW2

Auxiliary keyboard

J22

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP2

open

 

Monitor type select color

JP2

closed

Factory configured - do not alter

JP6

open

External battery type select lithium 3.6VDC

JP14

pins 1 & 3 closed

 

External battery type select alkaline 4.5VDC

JP14

pins 1 & 2 closed

 

External battery type select four pack AA 6VDC

JP14

pins 3 & 4 closed

Factory configured - do not alter

JP15

open

 

I/O bus select zero wait states

JP16

JP17

closed

closed

 

I/O bus select one wait state

JP16

JP17

closed

open

 

I/O bus select two wait states

JP16

JP17

open

closed

 

I/O bus select three wait states

JP16

JP17

open

open

Factory configured - do not alter

JP18

open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

NONE

16MB

(4) 4M x 9

NONE

NONE

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 4M x 9

(1) 4M x 36

NONE

28MB

(4) 1M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

NONE

40MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

CPU TYPE CONFIGURATION

CPU Type

JP3

JP4

JP5

80486DX

pins 2 & 3 closed

closed

pins 1 & 2 closed

80487SX

pins 1 & 2 closed

closed

pins 1 & 2 closed

80486SX

open

open

pins 2 & 3 closed

SRAM JUMPER CONFIGURATION

Size

JP9

JP10

JP12

64KB

open

open

open

256KB

closed

closed

closed

SRAM CONFIGURATION

Size

Bank 0

TAG

Dirty Bit (U64)

64KB

(8) 8K x 8

(2) 16K x 4

(1) 64K x 1

256KB

(8) 32K x 8

(2) 16K x 4

(1) 64K x 1

CPU SPEED CONFIGURATION

CPU Speed

JP7

JP13

50MHz

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

25MHz

pins 2 & 3 closed

pins 2 & 3 closed