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INTERSYSTEM 386SX

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