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Little Max 386SX

CSS LABORATORIES, INC.

Little Max 386SX

Processor

80386SX

Processor Speed

16/20MHz

Chip Set

C & T

Max. Onboard DRAM

16MB

SRAM Cache

None

BIOS

AMI

Dimensions

334mm x 127mm

I/O Options

Auxiliary keyboard, IDE interface, floppy drive interface, parallel port, serial ports(2)

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J3

Hard drive access LED

J40

Power LED & keylock

J4

IDE interface LED

LED

Turbo switch

J6

Floppy drive interface

PJ1

Auxiliary keyboard

J7A

Parallel port

PJ2

Reset switch

J11 pins 1 & 2

Serial port 1

PJ3

Turbo LED

J11 pins 3 & 4

Serial port 2

PJ4

Front panel switches & LEDs

J39

IDE interface

PJ5

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Floppy drive interface enabled

FDDEN

pins 2 & 3 closed

 

Floppy drive interface disabled

FDDEN

pins 1 & 2 closed

IDE interface enabled

IDEEN

pins 2 & 3 closed

 

IDE interface disabled

IDEEN

pins 1 & 2 closed

Factory configured - do not alter

J2

open

Monitor type select color

J8

pins 2 & 3 closed

 

Monitor type select monochrome

J8

pins 1 & 2 closed

BIOS type select 27256

J9

pins 1 & 2 closed

 

BIOS type select 27128

J9

pins 2 & 3 closed

 

CPU speed select 16MHz

J10

closed

 

CPU speed select 20MHz

J10

open

 

 

Pipeline mode enabled

J1

W1

W2

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

 

 

Pipeline mode disabled

J1

W1

W2

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(2) 256K x 9

NONE

1MB

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

SERIAL PORT 1 CONFIGURATION

COM

IRQ Interrupt

I/O Address

Jumper PJ6

S0

S1

COM 2

IRQ3

2F8h

pins 1 & 3

pins 1 & 2

pins 2 & 3

COM 1

IRQ4

3F8h

pins 1 & 2

pins 2 & 3

pins 2 & 3

Disabled

N/A

N/A

N/A

pins 1 & 2

pins 1 & 2

SERIAL PORT 2 CONFIGURATION

COM

IRQ Interrupt

I/O Address

Jumper PJ6

S2

S3

COM 1

IRQ4

3F8h

pins 2 & 4

pins 1 & 2

pins 2 & 3

COM 2

IRQ3

2F8h

pins 3 & 4

pins 2 & 3

pins 2 & 3

Disabled

N/A

N/A

N/A

pins 1 & 2

pins 1 & 2

PARALLEL PORT 1 (PJ2) CONFIGURATION

LPT

IRQ Interrupt

I/O Address

P0

P1

PRT

LPT 1

IRQ7

3F8h

pins 1 & 2

pins 2 & 3

pins 2 & 3

LPT 2

IRQ5

2F8h

pins 2 & 3

pins 2 & 3

pins 1 & 2

LPT 3

IRQ7

3BCh

pins 2 & 3

pins 1 & 2

pins 2 & 3

Disabled

N/A

N/A

pins 1 & 2

pins 1 & 2

N/A