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EQUITY 386DX/25 PLUS

EPSON, INC.

EQUITY 386DX/25 PLUS

Processor

80386DX

Processor Speed

25MHz

Chip Set

Unidentified

Video Chip Set

Chips and Technology

Maximum Onboard Memory

16MB

Maximum Video Memory

Unidentified

Cache

32KB

BIOS

Epson

Dimensions

355mm x 304mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port, VGA port

NPU Options

80387DX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

Speaker

CN12

VGA port

CN3

LED connector

CN13

Serial port

CN4

Power LED

CN14

Parallel port

CN5

Floppy drive interface

CN15

IDE interface LED

CN11

IDE interface

CN16

USER CONFIGURABLE SETTINGS

Function

Label

Position

IOCHRDY signal normal

J1

Pins 2 & 3 closed

 

IOCHRDY signal early

J1

Pins 1 & 2 closed

Factory configured do not alter

J9

Unidentified

Internal mouse port enabled

J10

Pins 1 & 2 closed

 

Internal mouse port disabled

J10

Pins 2 & 3 closed

External mouse port enabled

J11

Pins 2 & 3 closed

 

External mouse port disabled

J11

Pins 1 & 2 closed

Monitor type select color

J12

Pins 1 & 2 closed

 

Monitor type select monochrome

J12

Pins 2 & 3 closed

Password disabled

J13

Pins 1 & 2 closed

 

Password enabled

J13

Pins 2 & 3 closed

On board video enabled

J14

Pins 1 & 2 closed

 

On board video disabled

J14

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

None

None

None

2MB

(4) 256K x 9

(4) 256K x 9

None

None

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

None

4MB (A)

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB (B)

(4) 1M x 9

None

None

None

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

None

8MB

(4) 1M x 9

(4) 1M x 9

None

None

9MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

None

10MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

10MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

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

DRAM JUMPER CONFIGURATION

Size

J4

J5

J6

J7

J8

1MB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2MB

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

3MB

2 & 3

1 & 2

2 & 3

2 & 3

1 & 2

4MB (A)

2 & 3

1 & 2

2 & 3

1 & 2

1 & 2

4MB (B)

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

6MB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

8MB

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

9MB

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

10MB

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

10MB

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

12MB

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

16MB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

BASE MEMORY SELECTION

Size

J2

J3

256KB

Pins 2 & 3 closed

Pins 2 & 3 closed

512KB

Pins 1 & 2 closed

Pins 2 & 3 closed

640KB

Pins 1 & 2 closed

Pins 1 & 2 closed

CACHE CONFIGURATION

Note: Board is factory installed with 32KB cache and is not configurable.

VIDEO MEMORY CONFIGURATION

Note: The size of the video memory is unidentified.