...because we can't all be on the bleeding edge...





MINIMAX/LITTLE MAX 486

CSS LABORATORIES, INC.

MINIMAX/LITTLE MAX 486

Processor

80486SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

25/33/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

16MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J4

Floppy drive interface

PJ1

Reset switch/Turbo LED

J5

Parallel port

PJ2

Turbo switch (not available on MiniMax)

J6

Serial port 1

PJ3

Speaker

J9

Serial port 2

PJ4

Equipment panel connector

J39

IDE interface

PJ5

IDE interface LED

J40

Riser Card

SL1

IDE interface LED (on board IDE)

LED

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CPU speed select iOSC/1 (50/66MHz)

J1

pins 1 & 2 closed

 

CPU speed select iOSC/2 (25/33MHz)

J1

pins 2 & 3 closed

Ocsillator type select OSC1 (25/50MHz)

J2

pins 1 & 2 closed

 

Ocsillator type select OSC3 (33/66MHz)

J2

pins 2 & 3 closed

Monitor type select color

J3

pins 1 & 2 closed

 

Monitor type select monochrome

J3

pins 2 & 3 closed

Factory configured - do not alter

J11

Open

Floppy drive interface enabled

S4

pins 2 & 3 closed

 

Floppy drive interface disabled

S4

pins 1 & 2 closed

IDE interface enabled

S5

pins 2 & 3 closed

 

IDE interface disabled

S5

pins 1 & 2 closed

SERIAL PORT CONFIGURATION (PJ3)

Port 1

IRQ

S0

S1

PJ6

Disabled

N/A

pins 1 & 2 closed

pins 1 & 2 closed

N/A

COM1

IRQ4

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

COM2

IRQ3

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 3 closed

SERIAL PORT CONFIGURATION (PJ4)

Port 2

IRQ

S2

S3

PJ6

Disabled

N/A

pins 1 & 2 closed

pins 1 & 2 closed

N/A

COM1

IRQ4

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 4 closed

COM2

IRQ3

pins 2 & 3 closed

pins 2 & 3 closed

pins 3 & 4 closed

PARALLEL PORT CONFIGURATION

LPT

IRQ

P0

P1

PRT

Disabled

N/A

pins 1 & 2 closed

pins 1 & 2 closed

N/A

LPT 1

IRQ7

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

LPT 2

IRQ5

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

LPT 3

IRQ7

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(1) 256K x 36

NONE

2MB

(1) 256K x 36

(1) 256K x 36

2MB

(1) 512K x 36

NONE

4MB

(1) 1M x 36

NONE

5MB

(1) 256K x 36

(1) 1M x 36

6MB

(1) 512K x 36

(1) 1M x 36

8MB

(1) 1M x 36

(1) 1M x 36

8MB

(1) 2M x 36

NONE

10MB

(1) 512K x 36

(1) 2M x 36

16MB

(1) 2M x 36

(1) 2M x 36

DRAM JUMPER CONFIGURATION

Size

J8

J10

1MB

Open

Open

2MB

pins 1 & 2 closed

pins 2 & 3 closed

2MB

pins 2 & 3 closed

Open

4MB

Open

Open

5MB

pins 1 & 2 closed

pins 2 & 3 closed

6MB

pins 2 & 3 closed

pins 1 & 2 closed

8MB

pins 1 & 2 closed

pins 2 & 3 closed

8MB

pins 2 & 3 closed

Open

10MB

pins 2 & 3 closed

pins 1 & 2 closed

16MB

pins 2 & 3 closed

pins 1 & 2 closed

Note: This board accepts 4M x 36 SIMMS, but jumper settings are not identified by the manufacturer.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W6

W7

W8

W9

64KB

Open

Open

pins 2 & 3 closed

pins 2 & 3 closed

128KB

Open

Closed

pins 1 & 2 closed

pins 1 & 2 closed

256KB

Closed

Closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

W2

W4

W5

80486SX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

Open

CPU TYPE CONFIGURATION (OVERDRIVE)

Type

W1

W3

Overdrive installed

pins 1 & 2 closed

Closed

Overdrive not installed

pins 2 & 3 closed

Open

EQUIPMENT PANEL CONNECTOR PIN OUT

Description

J39

Ground

pin 1

Power

pin 1

Hard drive LED

pin 3

Not used

pin 4

Power

pin 5

Ground

pin 6

Turbo LED

pin 7

Keyboard inhibit

pin 8

Power

pin 9

Reset button

pin 10