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EQUITY 486SX/25 PLUS

EPSON, INC.

EQUITY 486SX/25 PLUS

Processor

80486SX/80487SX

Processor Speed

25Mhz

Chip Set

Epson

Max. Onboard DRAM

16MB

Cache

32KB

BIOS

Epson

Dimensions

355mm x 304mm

I/O Options

32-bit external memory card, floppy drive interface, IDE interface,

parallel port, PS/2 mouse port, serial port, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

Case connector block

CN13

VGA port

CN3

Floppy drive interface

CN15

Serial port

CN4

IDE interface LED

CN16

Parallel port

CN5

32-bit external memory card slot

CN19

Hard drive LED

CN11

Chassis fan power

CN21

Speaker

CN12

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JP1

pins 2 & 3 closed

Factory configured - do not alter

JP2

pins 2 & 3 closed

Factory configured - do not alter

JP3

pins 2 & 3 closed

On-board VGA adapter enabled

JP4

pins 1 & 2 closed

 

On-board VGA adapter disabled

JP4

pins 2 & 3 closed

Password enabled

JP5

pins 1 & 2 closed

 

Password disabled

JP5

pins 2 & 3 closed

Monitor type select color

JP6

pins 1 & 2 closed

 

Monitor type select monochrome

JP6

pins 2 & 3 closed

Mouse port enabled

JP7

pins 1 & 2 closed

 

Mouse port disabled

JP7

pins 2 & 3 closed

Normal IOCHRDY signal enabled

JP15

pins 1 & 2 closed

 

Early IOCHRDY signal enabled

JP15

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

JP8

JP9

JP10

JP11

JP12

4MB

(4) 4M x 9

NONE

NONE

NONE

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

8MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

2 & 3

2 & 3

2 & 3

1 & 2

1 & 2

9MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

NONE

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

10MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

12MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

16MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note:Pins designated should be in the closed position.

Banks 0 - 3 are located on the external memory card.

BASE MEMORY CONFIGURATION

Size

JP13

JP14

256KB

pins 2 & 3 closed

pins 2 & 3 closed

512KB

pins 2 & 3 closed

pins 1 & 2 closed

640KB

pins 1 & 2 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

CPU

JP1

JP2

JP3

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed