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





LASER 486 MODULAR EISA

LASER COMPUTER, INC.

LASER 486 MODULAR EISA

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

96MB (with two memory cards installed)

Cache

64/128KB

BIOS

Unidentified

Dimensions

330mm x 220mm

I/O Options

External memory cards (2), external CPU card, PS/2 mouse port

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse connector

J7

Diagnostic connector

J32

Speaker

J9

External memory cards

SL1 & SL2

Front panel connector

J10

External CPU card

SL3

External battery

J12

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

EISA bus controller speed select 25MHz

JP1

Closed

 

EISA bus controller speed select 33MHz

JP1

Open

»

BIOS type select 27512

JP2

Closed

 

BIOS type select 27010

JP2

Open

»

Battery type select internal

JP3

pins 2 & 3 closed

 

Battery type select external

JP3

pins 1 & 2 closed

»

Real time clock select MC146818A

JP4

Closed

 

Real time clock select MC146818 or HD146818

JP4

Open

»

Parity check enabled

JP5

Closed

 

Parity check disabled

JP5

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

9MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

16MB

(4) 4M x 9

NONE

NONE

17MB

(4) 256K x 9

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

20MB

(4) 4M x 9

(4) 1M x 9

NONE

24MB

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

NONE

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

33MB

(4) 256K x 9

(4) 4M x 9

(4) 4M x 9

36MB

(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

Note: In order to have 96MB, use two memory cards.

CONNECTIONS

Purpose

Location

Chassis fan power

J2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

JP2

N/A

CACHE CONFIGURATION

Size

Bank 0

Bank 1

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

NONE

Note: The orientation of the cache banks are unidentified.

CPU TYPE CONFIGURATION

Type

JP1

80486SX

pins 5 & 6 closed

80487SX

pins 2 & 3, 4 & 5, 6 & 7 closed

80486DX

pins 1 & 2, 4 & 5, 6 & 7 closed

80486DX2

pins 1 & 2, 4 & 5, 6 & 7 closed

CPU SPEED CONFIGURATION

Speed

JP3

JP4

JP5

16MHz

Closed

Closed

Closed

20MHz

Closed

Closed

Open

25MHz

Closed

Open

Closed

33MHz

Closed

Open

Open

50iMHz

Closed

Open

Closed

66iMHz

Closed

Open

Open