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486/B2

ATRONICS INTERNATIONAL, INC.

486/B2

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

UMC

Max. Onboard DRAM

64MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J4

32-bit external memory card

S1

Turbo switch

J5

Reset switch

W7

Speaker

J6

Turbo LED

W11

Power LED & keylock

J7

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CPU speed select iOSC/1

JPX20

pins 2 & 3 closed

 

CPU speed select iOSC/2

JPX20

pins 1 & 2 closed

Monitor type select color

W8

pins 1 & 2 closed

 

Monitor type select monochrome

W8

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

DRAM JUMPERCONFIGURATION

Size

JP2

JP3

On board memory used

pins 2 & 3 closed

pins 2 & 3 closed

No on board memory used

pins 1 & 2 closed

pins 1 & 2 closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U4, U8 & U16)

32KB

(4) 8K x 8

NONE

(3) 16K x 4

64KB

(4) 8K x 8

(4) 8K x 8

(3) 16K x 4

128KB

(4) 32K x 8

NONE

(3) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(3) 16K x 4

Note : If more then 16MB of DRAM is being cached, an additional 16K x 4 TAG chip must be installed at U12.

CACHE JUMPER CONFIGURATION

Size

W1

W2

W3

W4

W5

W10

32KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

64KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

128KB

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note : Pins designated should be in the closed position,

CPU TYPE CONFIGURATION

Type

JPX9

JPX11

JPX12

JPX13

80486SX

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

ODP486SX

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

80486DX2

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed