PAT48PR Motherboard Settings and Configuration

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

64MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

220mm x 240mm

I/O Options

32-bit VESA local bus slot (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1/pins 1-4

IDE interface LED

J1 pins 10 & 20

Turbo switch

J1/pins 7 & 17

IDE interface LED

J2

Turbo LED

J1/pins 8 & 18

External battery

J4

Reset switch

J1/pins 9 & 19

32-bit VESA local bus card (2)

S1 & S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation (internal battery)

JP1

pins 2 & 3 closed

»

CMOS memory normal operation (external battery)

JP1

open

CMOS memory clear

JP1

pins 1 & 2 closed

»

Monitor type select color

JP4

closed

Monitor type select monochrome

JP4

open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

RNB1 & RNB2

RNC2

1MB

(4) 256K x 9

NONE

NONE

NONE

open

closed

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

open

closed

4MB

(4) 1M x 9

NONE

NONE

NONE

open

closed

4MB

NONE

NONE

(1) 1M x 36

NONE

closed

open

5MB

(4) 1M x 9

(4) 256K x 9

NONE

NONE

open

closed

6MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

NONE

open

closed

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

open

closed

8MB

NONE

NONE

(1) 1M x 36

(1) 1M x 36

closed

open

9MB

(4) 256K x 9

(4) 1M x 9

(1) 1M x 36

NONE

open

closed

10MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

open

closed

12MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

NONE

open

closed

13MB

(4) 256K x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

open

closed

16MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

open

closed

16MB

(4) 4M x 9

NONE

NONE

NONE

open

closed

16MB

NONE

NONE

(1) 4M x 36

NONE

closed

open

20MB

(4) 4M x 9

(4) 1M x 9

NONE

NONE

open

closed

20MB

NONE

NONE

(1) 4M x 36

(1) 1M x 36

closed

open

24MB

(4) 4M x 9

(4) 1M x 9

(1) 1M x 36

NONE

open

closed

28MB

(4) 4M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

open

closed

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

open

closed

32MB

NONE

NONE

(1) 4M x 36

(1) 4M x 36

closed

open

36MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

NONE

open

closed

40MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

open

closed

48MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

NONE

open

closed

52MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 1M x 36

open

closed

52MB

(4) 4M x 9

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

open

closed

64MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

open

closed

SRAM CONFIGURATION

Size

Cache

Location

TAG(U43)

TAG(U44)

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

(1) 64K x 1

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

(1) 64K x 1

256KB

(8) 32K x 8

Banks 0 & 1

(1) 32K x 8

(1) 64K x 1

SRAM RESISTOR CONFIGURATION

Size

RND

RNE

RNF

64KB

closed

open

open

128KB

open

closed

open

256KB

open

open

closed

CPU JUMPER CONFIGURATION

CPU

RNA3

RNB3

RNC3

80486DX2

closed

open

open

ODP486SX

open

closed

open

80486DX

closed

open

open

80487SX

open

closed

open

80486SX

open

open

closed

VESA CARDS SUPPORTED JUMPER CONFIGURATION

# of VESA cards

W21

W22

W23

2

closed

closed

pins 1 & 2 closed

1

W21/pin 1 connected to W22/pin1

pins 2 & 3 closed

Note: The manufacturer recommends that only one VESA card be used with a 486DX-50MHz.

CPU SPEED JUMPER CONFIGURATION

CPU

JP2

JP3

JP5 & JP6

W13

W14

W15

W16

25MHz

pins 2 & 3

pins 1 & 2

open

open

open

closed

open

33MHz

pins 2 & 3

pins 1 & 2

open

open

open

open

closed

50iMHz

pins 2 & 3

pins 1 & 2

open

open

open

closed

open

50MHz

pins 1 & 2

pins 2 & 3

closed

open

open

closed

open

66iMHz

pins 2 & 3

pins 1 & 2

open

open

open

open

closed

Pins designated are in the closed position.