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INTERSYSTEM 386/25

OGIVAR, INC.

INTERSYSTEM 386/25

Processor

80386DX

Processor Speed

25MHz

Chip Set

Unidentified

Max. Onboard DRAM

16MB (on external memory card)

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card (2)

NPU Options

80287/80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J2

Reset switch

JP3 or JP8

Speaker

J5

32-bit external memory card

SL1 & SL2

Power LED & keylock

J6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

J4

N/A

Factory configured - do not alter

J7

N/A

Battery type select external

JP1

Open

 

Battery type select internal

JP1

Closed

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

Power good signal detect from power supply

JP4

pins 2 & 3 closed

 

Power good signal detect from board

JP4

pins 1 & 2 closed

NPU synchronous with CPU

JP5

pins 1 & 2 closed

 

NPU asynchronous with CPU

JP5

pins 1 & 2 closed

DRAM CONFIGURATION (EXTERNAL MEMORY CARD)

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

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

NONE

6MB

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NPU TYPE SELECT

Type

JP6

JP7

None

Closed

Open

 

80287

Closed

Open

 

80387

Open

Closed

Note: Exact location of JP6 & JP7 is approximate. Both jumpers are labeled on the board.