ECA 34M50FL Motherboard Settings and Configuration

Processor

80386DX/CX486DLC/80486SX/80486DX/80486DX2

Processor Speed

16/20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo Switch

J13

Power LED & keylock

J10

Turbo LED

J14

Speaker

J11

Chassis fan power

J15

Reset switch

J12

32-bit VESA Local bus slots

S1 & S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

W1

pins 1 & 2 closed

CMOS memory clear

W1

pins 2 & 3 closed

»

On board battery enabled

W2

pins 1 & 2 closed

On board battery disabled

W2

pins 2 & 3 closed

»

Factory configured - do not alter

W14

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG/U24

Dirty Bit/U37

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 16K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

(1) 16K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 16K x 8

CACHE JUMPER CONFIGURATION

Size

W5

W6

W7

W8

W9

W10

W11

W12

64KB

1 & 2

1 & 2

1 & 2

Open

Open

Open

Open

Open

128KB

2 & 3

1 & 2

2 & 3

1 & 2

Open

Closed

Open

Closed

256KB

2 & 3

2 & 3

1 & 2

2 & 3

Closed

Closed

Closed

Closed

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

SW3/1

SW3/2

SW3/3

SW3/4

SW3/5

SW3/6

CX486DLC

Off

On

On

Off

Off

Off

80486SX/20

Off

Off

Off

On

On

Off

80486SX/25

Off

Off

Off

Off

On

Off

80486SX (PQFP)

Off

Off

Off

Off

Off

Off

80486DX

Off

On

On

Off

Off

Off

80486DX (PQFP)

On

Off

Off

Off

Off

On

ODP486SX

Off

On

On

Off

Off

Off

80486DX2

Off

On

On

Off

Off

Off

CPU TYPE CONFIGURATION (CONT.)

Type

Pins

J9

80486SX

168

pins 1 & 2 closed

80486SX/80486DX2

168 Overdrive

pins 1 & 2 closed

80486DX

168 Overdrive

pins 2 & 3 closed

80486DX

169 Overdrive

pins 1 & 2 closed

80486DX/80486DX2

168

pins 2 & 3 closed

CPU TYPE CONFIGURATION (CONT.)

Type

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

80386

On

On

On

On

On

On

80486

Off

Off

Off

Off

Off

Off

NPU TYPE CONFIGURATION

Type

SW2/switch 7

80387DX enabled

On

80387DX disabled

Off

CPU TYPE CONFIGURATION (CONT.)

Type

J5

80486SX

pins 2 & 3 closed

80486DX

pins 2 & 3 closed

ODP486SX

pins 1 & 2 closed

80486DX2

pins 2 & 3 closed

Note:This only applies when the 80486SX/DX PQFP is disabled.

CPU SPEED CONFIGURATION

CPU

Speed

Osc.

SW1/1

SW1/2

SW1/3

SW1/4

80386DX

16MHz

16MHz

On

On

On

On

80386DX

16MHz

16MHz

On

On

Off

Off

80386DX

20MHz

20MHz

On

On

On

Off

80386DX

33MHz

33MHz

On

Off

On

On

80386DX

40MHz

80MHz

On

Off

Off

Off

80486SX

20MHz

40MHz

Off

Off

On

Off

80486SX

25MHz

25MHz

On

On

Off

On

80487SX

20MHz

40MHz

Off

Off

On

Off

80487SX

25MHz

25MHz

On

On

Off

On

80486DX

25MHz

25MHz

On

On

Off

On

80486DX

33MHz

33MHz

On

Off

On

On

80486DX

50MHz

50MHz

Off

Off

Off

Off

ODP486SX

50i MHz

25MHz

On

On

Off

On

ODP486SX

66i MHz

33MHz

On

Off

On

On

80486DX2

50i MHz

25MHz

On

On

Off

On

80486DX2

66i MHz

33MHz

On

Off

On

On

VESA WAIT STATE/BUS SPEED CONFIGURATION

CPU speed

Wait states

J4

J6

J7

Auto detect

Auto select

Closed

Open

Closed

£ 33MHz

0 wait states

Closed

Closed

Open

> 33MHz

1 wait state

Open

Closed

Closed