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VANTAGE 486NC SX-20/25/33 Motherboard Settings and Configuration






PIONEER COMPUTER, INC.

VANTAGE 486NC SX-20/25/33

Processor

80486SX/ODP486SX

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

None

BIOS

Phoenix

Dimensions

240mm x 220mm

I/O Options

None

NPU Options

80487SX

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

J2

Speaker

J5

Turbo switch

J3

Power LED & keylock

J6

Reset switch

J4

External battery

J7

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP3

pins 1 & 2 closed

 

CMOS memory clear

JP3

pins 2 & 3 closed

80487SX or ODP486SX upgrade not installed

JP4

pins 1 & 2 closed

 

80487SX or ODP486SX upgrade installed

JP4

pins 2 & 3 closed

Factory configured - do not alter

JP6

Open

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) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9








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