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ACERPOWER 486 (V20 PROJECT)

ACER, INC.

ACERPOWER 486 (V20 PROJECT)

Processor

80486SX/80486SX2/80486DX/80486DX2/80486DX4/Pentium Overdrive

Processor Speed

25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

64MB

Cache

128/256/512KB

BIOS

Acer

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slot, 32-bit PCI slots (3), green PC connector, PS/2 mouse port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

32-bit VESA local bus slot

SL1

32-bit PCI slots

PC1 - PC3

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

CN8

N/A

Factory configured - do not alter

CN9

N/A

Factory configured - do not alter

CN10

N/A

Password enabled

JP1

pins 1 & 2 closed

 

Password disabled

JP1

pins 2 & 3 closed

BIOS type select Acer

JP2

pins 1 & 2 closed

 

BIOS type select OEM

JP2

pins 2 & 3 closed

Factory configured - do not alter

JP3

pins 3 & 4 closed

Factory configured - do not alter

JP4

pins 1 & 2, 3 & 4, 5 & 6 closed

 

Factory configured - do not alter

JP6

pins 2 & 3 closed

Factory configured - do not alter

JP7

pins 2 & 3 closed

M5115 enabled

JP8

pins 1 & 2 closed

 

M5115 disabled

JP8

pins 2 & 3 closed

Factory configured - do not alter

JP10

pins 1 & 2 closed

Local bus IDE I/O address select 0FXH

JP11

pins 1 & 2 closed

 

Local bus IDE I/O address select 07XH

JP11

pins 2 & 3 closed

Local bus IDE interface enabled

JP12

pins 2 & 3 closed

 

Local bus IDE interface disabled

JP12

pins 1 & 2 closed

Reset button enabled

JP23

pins 1 & 2 closed

 

Reset button disabled

JP23

pins 2 & 3 closed

Power saving feature disabled

JP24

pins 2 & 3 closed

 

Power saving feature enabled

JP24

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 36

NONE

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

12MB

(1) 1M x 36

NONE

(1) 2M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 2M x 36

NONE

(1) 2M x 36

NONE

16MB

(1) 4M x 36

NONE

NONE

NONE

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

512KB

NONE

(4) 128K x 8

(1) 32K x 8

Note: The location of the TAG is unidentified.

CACHE JUMPER CONFIGURATION

Size

J13

J15

J16

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

512KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JP9

JP20

80486SX

pins 2 & 3 closed

pins 1 & 2 closed

80486SX2

pins 2 & 3 closed

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

pins 1 & 2 closed

80486DX2

pins 2 & 3 closed

pins 1 & 2 closed

80486DX4

pins 2 & 3 closed

pins 1 & 2 closed

Pentium Overdrive

pins 1 & 2 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP26

JP27

Intel

pins 1 & 2 closed

pins 1 & 2 closed

AMD

pins 2 & 3 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

JP17

JP21

25MHz

pins 1 & 5 closed

pins 2 & 3 closed

33MHz

pins 2 & 6 closed

pins 2 & 3 closed

50iMHz

pins 1 & 5 closed

pins 2 & 3 closed

66iMHz

pins 2 & 6 closed

pins 2 & 3 closed

75iMHz

pins 1 & 5 closed

pins 2 & 3 closed

100iMHz

pins 2 & 6 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION (80486DX4 ONLY)

Speed

JP22

2.0x

pins 1 & 2 closed

2.5x

pins 2 & 3 closed

3.0x

pins 3 & 4 closed