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





486 ASIC II

VTECH INDUSTRIES, INC.

486 ASIC II

Processor

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

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

128KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Front panel connector

J2

Serial port 2

J11

IDE interface LED

J3

IDE interface

J12

External battery

J4

Parallel port

J13

Speaker

J5

Game port

J14

Floppy drive interface

J9

VGA port

J16

Serial port 1

J10

Riser Card

SL1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JP6

pins 2 & 3 closed

Battery type select internal

JP7

pins 1 & 2 closed

 

Battert type select external

JP7

pins 2 & 3 closed

CMOS memory normal operation

JP8

pins 1 & 2 closed

 

CMOS memory clear

JP8

pins 2 & 3 closed

Factory configured - do not alter

JP9

Closed

Factory configured - do not alter

JP11

pins 2 & 3 closed

On board I/O enabled

JP17

Closed

 

On board I/O disabled

JP17

Open

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

128KB

(4) 32K x 8

128KB

(4) 32K x 9

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

128KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP10

80486SX

pins 1 & 2 closed

ODP486SX

pins 2 & 3 closed

80487SX

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

80486DX2

pins 1 & 2 closed

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

CPU SPEED CONFIGURATION

Speed

JP5

20MHz

pins 1 & 2, 5 & 6 closed

25MHz

pins 5 & 6 closed

33MHz

pins 1 & 2, 3 & 4 closed

50iMHz

pins 5 & 6 closed

66iMHz

pins 1 & 2, 3 & 4 closed

VRAM CONFIGURATION

Note: The size of the VRAM memory is unidentified.