OGIVAR INC.

INTERSYSTEM 386SX

Processor

80386SX (exact location unidentified)

Processor Speed

16/20MHz

Chip Set

Unidentified

Max. Onboard DRAM

8MB

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX (exact location unidentified)

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J2

Speaker

J13

Reset switch

J11

Power LED & keylock

J14

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

J12

N/A

»

Factory configured - do not alter

J15

N/A

»

Battery type select external

JP1

Open

 

Battery type select internal

JP1

pins 1 & 2 closed

»

BIOS type select 27256

JP2

pins 2 & 3 closed

 

BIOS type select 27128

JP2

pins 1 & 2 closed

»

Monitor type select color

JP4

Closed

 

Monitor type select monochrome

JP4

Open

»

NPU disabled

JP7

Closed

 

NPU enabled

JP7

Open

»

Pipeline mode enabled

JP8

Closed

 

Pipeline mode disabled

JP8

Open

Note: NPU must be synchronous with CPU.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(2) 256K x 9

NONE

NONE

NONE

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

5MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

(2) 1M x 9

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

Note: Banks locations are unidentified and are labeled on the board in the following manner:

Bank 0: SIMM 4 & 8

Bank 1: SIMM 3 & 7

Bank 2: SIMM 2 & 6

Bank 3: SIMM 1 & 5