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





USA 486DX

EVERSOURCE COMPUTERS, INC.

USA 486DX

Processor

80486DX

Processor Speed

33/50MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

256KB

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J2

Reset switch

J6

Turbo switch

J4

External battery

J7

Turbo LED

J5

Speaker

J100

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

J3

Closed

 

Monitor type select monochrome

J3

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

1MB

NONE

(4) 256K x 9

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

4MB

NONE

(4) 1M x 9

5MB

(4) 256K x 9

(4) 1 M x 9

5MB

(4) 1 M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

16MB

NONE

(4) 4M x 9

17MB

(4) 4M x 9

(4) 256K x 9

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

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

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 1

128KB

(4) 32K x 8

NONE

(1) 8K x 1

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 1

Note:The exact location of TAG is unidentified.

CACHE JUMPER CONFIGURATION

Size

JMP1

JMP2

JMP3

64KB

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed