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AC 486 MODEL PQFP

UNIDENTIFIED

AC 486 MODEL PQFP

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

16/20/25/33/50(internal)/66(internal)MHz

Chip Set

ACC

Max. Onboard DRAM

32MB

Cache

None

BIOS

AMI

Dimensions

254mm x 236mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

J4

Turbo LED

J2

Speaker

J5

Turbo switch

J3

Power LED & keylock

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP2

pins 1 & 2 closed

Monitor type select color

JP2

pins 2 & 3 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

CPU TYPE CONFIGURATION

Type

JP3

JP4

JP5

80486SX

Open

pins 2 & 3 closed

pins 2 & 3 closed

80487SX

Closed

pins 1 & 2, 3 & 4 closed

pins 3 & 4 closed

80486DX

Closed

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

80486DX2

Closed

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP6

JP7

JP8

16MHz

Closed

Closed

Closed

20MHz

Open

Closed

Closed

25MHz

Closed

Open

Closed

33MHz

Closed

Closed

Open

50iMHz

Closed

Open

Closed

66iMHz

Closed

Closed

Open