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IT486SLC MINI

INFORMTECH INTERNATIONAL, INC.

IT486SLC MINI

Processor

80486SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

Opti

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

S1

Power LED & keylock

J21

32-bit VESA Local bus slot

SL1

Turbo LED

JP12

32-bit VESA Local bus slot

SL2

Turbo switch

JP13

32-bit VESA Local bus slot

SL3

Speaker

JP16

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 2 & 3 closed

 

CMOS memory clear

JP1

pins 1 & 2 closed

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

Clock chip installed

JP25

Open

 

Clock chip not installed

JP25

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

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U39)

TAG (U40)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION

Size

JP3

JP5

JP8

JP9

64KB

pins 2 & 3 closed

pins 2 & 3 closed

Open

Open

128KB

pins 1 & 2 closed

pins 1 & 2 closed

Open

Closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP6

JP7

JP11

80486SX

pins 2 & 3 closed

Open

Open

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

Closed

Pentium Overdrive

pins 1 & 2 closed

pins 1 & 2 closed

Closed

CPU SPEED CONFIGURATION

Speed

JP18

JP19

JP20

20MHz

Open

Closed

Closed

25MHz

Closed

Open

Closed

33MHz

Closed

Closed

Open

40MHz

Open

Open

Closed

50iMHz

Closed

Closed

Closed

50MHz

Open

Closed

Open

66iMHz

Closed

Closed

Closed

VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION

CPU speed

Wait states

JP14

JP17

< 33MHz

0 wait states

Open

Open

> 33MHz

1 wait state

Closed

Closed