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486 SERIES (MINI CASE - ASIC II)

VTECH INDUSTRIES, INC.

486 SERIES (MINI CASE - ASIC II)

Processor

80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Unidenitifed

Max. Onboard DRAM

32MB

Cache

128KB

BIOS

Unidenitifed

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J3

Front panel connector

J21

Speaker

J4

32-bit VESA local bus slots

SL1 & SL1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JP1

N/A

Factory configured - do not alter

JP3

Open

Factory configured - do not alter

JP10

pins 1 & 2 closed

CMOS memory normal operation

JP11

pins 1 & 2 closed

 

CMOS memory clear

JP11

pins 2 & 3 closed

Battery type select internal

JP12

pins 1 & 2 closed

 

Battery type select external

JP12

pins 2 & 3 closed

VESA card select does not support write back cache

JP14

pins 1 & 2 closed

 

VESA card select supports write back cache

JP14

pins 2 & 3 closed

Factory configured - do not alter

JP15

N/A

Factory configured - do not alter

JP19

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

2MB

(4) 512K x 9

NONE

4MB

(4) 512K x 9

(4) 512K x 9

4MB

(4) 1M x 9

NONE

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

TAG

128KB

(4) 32K x 8

(2) 8K x 8

128KB

(4) 32K x 9

(2) 8K x 9

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP7

JP8

32K x 8

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

32K x 9

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU UPGRADE CONFIGURATION

Type

JP2

None installed

pins 1 & 2, 4 & 5 closed

80486SX/DX/DX2 series installed

pins 2 & 3, 4 & 5 closed

Note: There is a PQFP CPU installed but the location is unidentified. These CPU types are installed in the PGA socket.

CPU SPEED CONFIGURATION

Speed

JP16

JP17

JP18

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Open

50iMHz

Open

Open

Closed

66iMHz

Closed

Closed

Open

BUS SPEED CONFIGURATION

CPU speed

JP4

JP13

JP20

<= 33MHz

pins 2 & 3 closed

pins 1 & 2 closed

Open

> 33MHz

pins 1 & 2 closed

pins 2 & 3 closed

Closed