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486-JAL REV. B

FIRST INTERNATIONAL COMPUTER, INC.

486-JAL REV. B

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Via

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

PS/2 mouse port, parallel port, serial ports (2), VGA port, VGA feature connector, floppy drive interface, IDE interface, riser slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN2

VGA feature connector

J13

Serial port 1

CN3

Turbo switch

J19

Serial port 2

CN4

Turbo LED

J20

Parallel port

CN5

Reset switch

J21

VGA port

CN6

Speaker

J22

Floppy drive interface

CN8

Power LED & keylock

J23

IDE interface

CN9

IDE interface LED

J45

External battery

J9

Riser Card

SL1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome/EGA/VGA

J4

Open

 

Monitor type select color

J4

Closed

CMOS memory normal operation

J5

Open

 

CMOS memory clear

J5

Closed

Factory configured - do not alter

J7

Open

Battery type select internal

J8

pins 2 & 3 closed

 

Battery type select external

J8

pins 1 & 2 closed

On board VGA enabled

J10

pins 1 & 2 closed

 

On board VGA disabled

J10

pins 2 & 3 closed

Factory configured - do not alter

J12

N/A

IDE interface enabled

J24

pins 1 & 2 closed

 

IDE interface disabled

J24

pins 2 & 3 closed

Password normal operation

J25

Open

 

Password reset

J25

Closed

Factory configured - do not alter

JC5

N/A

Floppy drive type select 1.44MB

JF1

pins 2 & 3 closed

 

Floppy drive type select 2.88MB

JF1

pins 1 & 2 closed

DRAM CONFIGURATION 1

Size

Bank 0

Bank 1

1MB

(1) 256K x 36

NONE

2MB

(1) 256K x 36

(1) 256K x 36

4MB

(1) 1M x 36

NONE

5MB

(1) 1M x 36

(1) 256K x 36

8MB

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

17MB

(1) 4M x 36

(1) 256K x 36

20MB

(1) 4M x 36

(1) 1M x 36

32MB

(1) 4M x 36

(1) 4M x 36

DRAM CONFIGURATION 2

Size

Bank 0A

Bank 1

4MB

4MB

NONE

5MB

4MB

(1) 256K x 36

8MB

4MB

(1) 1M x 36

20MB

4MB

(1) 4M x 36

Note: Bank 0A is factory installed and is not configurable. Use either this table or the above table.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

CPU TYPE CONFIGURATION

Type

J11

JC1

JC2

JC3

JC4

80486SX PQFP

2 & 3

2 & 3

2 & 3

2 & 3

Open

80486SX PGA

1 & 2

2 & 3

2 & 3

2 & 3

Open

80487SX

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

80486DX

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

80486DX2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JK1

25MHz

pins 5 & 6 closed

33MHz

pins 1 & 2 closed

50iMHz

pins 5 & 6 closed

66iMHz

pins 1 & 2 closed

HARD DRIVE SPEED CONFIGURATION

Speed

J16

J17

0

pins 2 & 3 closed

pins 2 & 3 closed

1

pins 1 & 2 closed

pins 2 & 3 closed

2

pins 1 & 2 closed

pins 1 & 2 closed

BUS SPEED CONFIGURATION

CPU speed

J18

<= 33MHz

pins 1 & 2 closed

> 33MHz

pins 2 & 3 closed

VRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

512KB

NONE

1MB

512KB

512KB

2MB

1MB

1MB

Note: The size of the VRAM chips are unidentified.