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386SX

COMMODORE BUSINESS MACHINES, INC.

386SX

Processor

80386SX

Processor Speed

16/20/25MHz

Chip Set

Unknown

Max. Onboard DRAM

16MB

Cache

None

BIOS

Commodore

Dimensions

254mm x 218mm

I/O Options

16-bit riser card slot, bus mouse port, floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA interface

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

16-bit riser card

CN1

Turbo LED

J3

VGA port

CN2

Turbo switch

J4

Serial port 2

CN3

Reset switch

J5

Serial port 1

CN4

IDE interface

J9

Parallel port

CN5

Floppy drive interface

J10

Bus mouse port

CN6

Game port

J12

Power LED & keylock

J1

External battery

J15

IDE interface LED

J2

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

J6

Closed

 

Monitor type select monochrome

J6

Open

IDE interface enabled

J7 and J8

Closed

 

IDE interface disabled

J7 and J8

Open

Battery type select internal

J14

pins 1 & 2 closed

 

Battery type select external

J14

pins 2 & 3 closed

VGA port wait states select one

J16

Open

 

VGA port wait states select zero

J16

Closed

VGA port enabled

J17

Closed

 

VGA port disabled

J17

Open

Floppy interface enabled

J23

pins 1 & 2 closed

 

Floppy interface disabled

J23

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

1.5MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

NONE

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

NONE

NONE

3MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

NONE

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

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

12MB

(2) 1M x 9

(2) 1M x 9

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

NONE

NONE

PARALLEL PORT CONFIGURATION

Parallel port

IRQ

J13

J18

J19

LPT1

5

pins 3 & 4 closed

Open

Closed

LPT1

7

pins 1 & 2 closed

Open

Closed

LPT2

5

pins 3 & 4 closed

Closed

Closed

LPT2

7

pins 1 & 2 closed

Closed

Closed

LPT3

5

pins 3 & 4 closed

Closed

Open

LPT3

7

pins 1 & 2 closed

Closed

Open

Disabled

N/A

N/A

Open

Open

SERIAL PORT CONFIGURATION

UART1

UART2

J20

J21

J22

COM1

COM2

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

COM1

Disabled

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

COM2

COM1

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

Disabled

COM1

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

Disabled

COM2

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

COM2

Disabled

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

Disabled

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

N/A