...because we can't all be on the bleeding edge...





486 EISA FULL SIZE

INFOMATIC POWER SYSTEMS CORPORATION

486 EISA FULL SIZE

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

256MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

355mm x 304mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J4

Turbo LED

J7

Power LED & keylock

J5

Reset switch

S9

Turbo switch

J6

 

 

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

External BCLK buffering 80486DX (33/50MHz)

JP1

pins 1 & 2 closed

 

External BCLK buffering 80486SX/80487SX (20/25MHz)

JP1

pins 2 & 3 closed

Cache bank select single (128/512KB)

JP2

pins 1 & 2 closed

 

Cache bank select double (64/256KB)

JP2

pins 2 & 3 closed

Snooping/Flush 20MHz CPU

JP8

Closed

 

Snooping/Flush > 20MHz CPU

JP8

Open

Monitor type select color

JP9

Closed

 

Monitor type select monochrome

JP9

Open

CPU clock mode select single frequency

JP12

pins 1 & 2 closed

 

CPU clock mode select double frequency

JP12

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(4) 1M x 9

NONE

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

NONE

28MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

NONE

40MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

52MB

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

NONE

NONE

128MB

(4) 16M x 9

(4) 16M x 9

NONE

NONE

192MB

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

NONE

256MB

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

CPU TYPE CONFIGURATION

Type

JP10

JP11

80486SX

pins 1 & 2 & 3 & 4 closed

pins 2 & 3 closed

80487SX

pins 1 & 2 & 3 & 4 closed

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

Open

EBC SPEED CONFIGURATION

Speed

JP6

JP7

20MHz

Open

Open

25MHz

Open

Open

33MHz

Open

Closed

40MHz

Closed

Open

50MHz

Closed

Closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

512KB

(4) 128K x 8

NONE

Note:In order to configure your cache for 512K, your board needs to have been specifically ordered. The difference will be that bank 1 will be made up of (4) 32 pin DIP sockets, instead of (4) 28 pin DIP sockets.

CACHE TAG CHIP CONFIGURATION

Size

JP3

JP4

JP5

U55

U56

64KB

Open

Open

Open

(1) 8K x 8

N/A

128KB

Closed

Open

Open

(1) 8K x 8

N/A

256KB

Closed

Closed

Open

(1) 8K x 8

(1) 8K x 8

512KB

Closed

Closed

Closed

(1) 32K x 8

N/A

CACHE DIRTY BIT CHIP CONFIGURATION

Size

JP16

JP17

JP18

U72 & U54

64KB

open

open

open

(2) 16K x 1 or (2) 64K x 1

128KB

closed

open

open

(2) 16K x 1 or (2) 64K x 1

256KB

closed

closed

open

(2) 16K x 1 or (2) 64K x 1

512KB

closed

closed

closed

(2) 64K x 1

CLOCK CONFIGURATION

Type

JP13

JP14

JP15

DS1287/1287A

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

DS1387/1488

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed