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BC3486UL

UNIDENTIFIED

BC3486UL

Processor

80386DX/CX486DLC/80486SX/80487SX/ODP487SX/80486DX/ 80486DX2

Processor Speed

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

Chip Set

UMC

Video Chip Set

None

Maximum Onboard Memory

32MB

Maximum Video Memory

None

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

Local bus slot

NPU Options

80387DX/CX83D87

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

BATT

Turbo switch

CN4

Power LED & keylock

CN1

Turbo LED

CN5

Speaker

CN2

Auxiliary keyboard connector

KBD

Reset switch

CN3

Local bus slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Battery type select internal

BATT

Pins 2 & 3 closed

 

Battery type select external

BATT

Closed

 

CMOS memory clear

BATT

Pins 3 & 4 closed

 

Monitor type select color

C/M

Closed

 

Monitor type select monochrome

C/M

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

Note: The location of banks 0 & 1 is unidentified.

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) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JS1

JS2

JS3

JS4

JS5

JS6

64KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

128KB

2 & 3

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

256KB

2 & 3

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (80386)

Speed

JF1

JF2

JF3

JF4

JF5

25MHz

Open

Closed

Closed

Closed

Open

33MHz

Open

Open

Closed

Closed

Closed

40MHz

Open

Closed

Open

Closed

Closed

CPU SPEED SELECTION (80486)

Speed

JF1

JF2

JF3

JF4

JF5

20MHz

Closed

Closed

Open

Open

Closed

25MHz

Open

Closed

Closed

Open

Closed

33MHz

Open

Open

Closed

Open

Closed

50iMHz

Open

Closed

Closed

Open

Closed

50MHz

Open

Open

Open

Open

Open

66iMHz

Open

Open

Closed

Open

Open

CPU TYPE SELECTION

Type

JC1

JC2

JC3

JC4

80386

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CX486DLC

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

80486

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

CPU TYPE SELECTION (80486 ONLY)

Type

JC5

J6C

80486SX

Pins 2 & 3 closed

Open

80487SX

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

ODP487SX

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

80486DX

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

80486DX2

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

NPU SELECTION

Setting

JC7

JC8

NPU not installed

Open

Open

NPU installed

Closed

Closed

LOCAL BUS SLOT SELECTION

Setting

J1

J2

J3

Normal ISA cards installed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Local Bus cards installed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

LOCAL BUS CARD INSTALLED SELECTION

CPU installed

J4

J5

80386

Pins 2 & 3 closed

Pins 2 & 3 closed

80486DX-50

Pins 2 & 3 closed

Pins 2 & 3 closed

All CPU types

Pins 1 & 2 closed

Pins 1 & 2 closed