JOINDATA SYSTEMS, INC.

G486PE

Processor

80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J4

Reset switch

J9

Power LED & keylock

J5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

I/O bus speed select normal

JP1

Open

 

I/O bus speed select slow

JP1

Closed

»

Monitor type select monochrome

JP5

Open

 

Monitor type select color

JP5

Closed

»

Burst mode enabled

JP7

Closed

 

Burst mode disabled

JP7

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

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

Bank 1

TAG (U52)

TAG (U52)

Dirty Bit(U66)

64KB

4) 8K x 8

4) 8K x 8

(1) 8K x 8

N/A

(1) 16K x 1

128KB

(4) 32K x 8

NONE

(1) 8K x 8

N/A

(1) 16K x 1

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

(1) 16K x 1

512KB

(4) 128K x 8

NONE

(1) 32K x 8

N/A

(1) 64K x 1

Note:You may use a (1) 64K x 1 at U66 for all Cache SRAM sizes .

CACHE JUMPER CONFIGURATION

Size

JP6

JP11

JP12

JP13

JP14

JP15

JP16

64KB

2 & 3

Open

Open

Open

Open

Open

Open

128KB

1 & 2

Open

Open

Closed

Open

Closed

Open

256KB

2 & 3

Open

Closed

Closed

Closed

Closed

Open

512KB

1 & 2

Closed

Closed

Closed

Closed

Closed

Closed

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

OSC1

JP2

JP3

JP8

JP9

JP10

80486DX2- 50 MHz

50MHz

Closed

Closed

1 & 2, 3 & 4

2 & 3

1 & 2

80486DX2- 50 MHz

25MHz

Closed

Closed

1 & 2, 3 & 4

1 & 2

1 & 2

80486DX- 50 MHz

50MHz

Closed

Closed

1 & 2, 3 & 4

1 & 2

1 & 2

80486DX- 33 MHz

66MHz

Closed

Open

1 & 2, 3 & 4

2 & 3

1 & 2

80486DX- 33 MHz

33MHz

Closed

Open

1 & 2, 3 & 4

1 & 2

1 & 2

80486DX- 25 MHz

50MHz

Open

Open

1 & 2, 3 & 4

2 & 3

1 & 2

80486DX- 25 MHz

25MHz

Open

Open

1 & 2, 3 & 4

1 & 2

1 & 2

80486SX- 25 MHz

50MHz

Open

Open

2 & 3

2 & 3

Open

80486SX- 25 MHz

25MHz

Open

Open

2 & 3

1 & 2

Open

80486SX- 20 MHz

40MHz

Open

Open

2 & 3

2 & 3

Open

80486SX- 20 MHz

20MHz

Open

Open

2 & 3

1 & 2

Open

Note:Pins designated should be in the closed position.