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P486

QDI COMPUTER, INC.

P486

Processor

80486SX/80487SX/80486DX

Processor Speed

33MHz

Chip Set

OPTI

Max. Onboard DRAM

64MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J11

Turbo LED

JP11

Power LED & keylock

J20

Reset switch

SW1

Speaker

J21

Turbo switch

SW2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 2 & 3 closed

 

CMOS memory clear

JP1

pins 1 & 2 closed

Monitor type select monochrome

JP2

Closed

 

Monitor type select color

JP2

Open

Factory configured - do not alter

JP6

Open

Oscillator type select double frequency

JP7

pins 2 & 3 closed

 

Oscillator type select single frequency

JP7

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

(4) 4M x 9

NONE

NONE

NONE

20MB

(4) 4M x 9

(4) 1M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

NONE

24MB

(4) 1M x 9

(4) 4M x 9

(1) 1M x 36

NONE

28MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 4M x 36

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 1M x 9

(4) 4M x 9

(1) 4M x 36

NONE

36MB

(4) 4M x 9

(4) 1M x 9

(1) 4M x 36

NONE

36MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

NONE

40MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

40MB

(4) 4M x 9

(4) 1M x 9

(1) 4M x 36

(1) 1M x 36

40MB

(4) 1M x 9

(4) 4M x 9

(1) 4M x 36

(1) 1M x 36

40MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

52MB

(4) 1M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

52MB

(4) 4M x 9

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

52MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 1M x 36

64MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

CACHE CONFIGURATION

Size

Bank 0

TAG

Dirty Bit

64KB

(8) 8K x 8

(1) 8K x 8 at U34

(1) 64K x 1 at U45

256KB

(8) 32K x 8

(1) 32K x 8 at U34

(1) 64K x 1 at U45

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP10

JP12

64KB

Open

Open

Open

Open

256KB

Open

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP3

jp4

JP5

80486SX

Open

Open

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

Closed

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

Closed

pins 1 & 2 closed