HwMuseum | Index

FIRST INTERNATIONAL COMPUTER, INC.

486-GT

Processor

CX486S/CX487S/80486SL/80486SX/CX486DX/80486DX/ODP486SX/ 80486DX2/Pentium Overdrive

Processor Speed

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

Chip Set

VIA

Max. Onboard DRAM

96MB

Cache

64/128/256KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

J8

Turbo switch

J2

Speaker

J9

Green Power supply connector

J3

Power LED & keylock

J10

Turbo LED

J6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select monochrome, EGA or VGA

J4

Open

 

Monitor type select color

J4

Closed

»

Adaptec ISA master installed

J5

Closed

 

Adaptec ISA master not installed

J5

Open

»

CMOS memory normal operation

J7

Open

 

CMOS memory clear

J7

Closed

»

Cyrix clock 2 x mode

JC8

pins 1 & 2 closed

 

Cyrix clock 1 x mode

JC8

pins 2 & 3 closed

»

Factory configured - do not alter

JP1

pins 1 & 2 closed

»

Factory configured - do not alter

JP3

pins 1 & 2 closed

»

Pentium Overdrive write-back CPU installed

JT1

pins 1 & 2 closed

 

Pentium Overdrive write-through CPU installed

JT1

pins 2 & 3 closed

»

Factory configured - do not alter

JX1

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

NONE

NONE

1MB

NONE

(1) 1M x 36

NONE

1MB

NONE

NONE

(1) 1M x 36

2MB

(4) 256K x 9

(1) 1M x 36

NONE

2MB

NONE

(1) 1M x 36

(1) 1M x 36

2MB

(4) 256K x 9

NONE

(1) 1M x 36

3MB

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

4MB

(4) 1M x 9

NONE

NONE

4MB

NONE

(1) 4M x 36

NONE

4MB

NONE

NONE

(1) 4M x 36

5MB

(4) 256K x 9

(1) 4M x 36

NONE

5MB

(4) 256K x 9

NONE

(1) 4M x 36

5MB

(4) 1M x 9

(1) 1M x 36

NONE

5MB

(1) 1M x 9

NONE

(1) 1M x 36

5MB

NONE

(1) 1M x 36

(1) 4M x 36

5MB

NONE

(1) 4M x 36

(1) 1M x 36

6MB

(4) 256K x 9

(1) 4M x 36

(1) 1M x 36

6MB

(4) 256K x 9

(1) 1M x 36

(1) 4M x 36

6MB

(1) 1M x 9

(1) 1M x 36

(1) 1M x 36

8MB

(1) 1M x 9

(1) 4M x 36

NONE

8MB

(1) 1M x 9

NONE

(1) 4M x 36

8MB

NONE

(1) 4M x 36

(1) 4M x 36

9MB

(4) 256K x 9

(1) 4M x 36

(1) 4M x 36

9MB

(1) 1M x 9

(1) 1M x 36

(1) 4M x 36

9MB

(1) 1M x 9

(1) 4M x 36

(1) 1M x 36

12MB

(1) 1M x 9

(1) 4M x 36

(1) 4M x 36

16MB

(1) 4M x 9

NONE

NONE

16MB

NONE

(1) 16M x 36

NONE

16MB

NONE

NONE

(1) 16M x 36

DRAM CONFIGURATION (CONT.)

Size

Bank 0

Bank 1

Bank 2

17MB

(4) 256K x 9

(1) 16M x 36

NONE

17MB

(4) 256K x 9

NONE

(1) 16M x 36

17MB

NONE

(1) 1M x 36

(1) 16M x 36

17MB

NONE

(1) 16M x 36

(1) 1M x 36

17MB

(1) 4M x 9

(1) 1M x 36

NONE

17MB

(1) 4M x 9

NONE

(1) 1M x 36

18MB

(4) 256K x 9

(1) 1M x 36

(1) 16M x 36

18MB

(4) 256K x 9

(1) 16M x 36

(1) 1M x 36

18MB

(1) 4M x 9

(1) 1M x 36

(1) 1M x 36

20MB

(1) 1M x 9

(1) 16M x 36

NONE

20MB

(1) 1M x 9

NONE

(1) 16M x 36

20MB

(1) 4M x 9

(1) 4M x 36

NONE

20MB

(1) 4M x 9

NONE

(1) 4M x 36

20MB

NONE

(1) 4M x 36

(1) 16M x 36

20MB

NONE

(1) 16M x 36

(1) 4M x 36

21MB

(4) 256K x 9

(1) 4M x 36

(1) 16M x 36

21MB

(4) 256K x 9

(1) 16M x 36

(1) 4M x 36

21MB

(1) 1M x 9

(1) 1M x 36

(1) 16M x 36

21MB

(1) 1M x 9

(1) 16M x 36

(1) 1M x 36

21MB

(1) 4M x 9

(1) 1M x 36

(1) 4M x 36

21MB

(1) 4M x 9

(1) 4M x 36

(1) 1M x 36

24MB

(1) 1M x 9

(1) 4M x 36

(1) 16M x 36

24MB

(1) 1M x 9

(1) 16M x 36

(1) 4M x 36

24MB

(1) 4M x 9

(1) 4M x 36

(1) 4M x 36

32MB

(1) 4M x 9

(1) 16M x 36

NONE

32MB

(1) 4M x 9

NONE

(1) 16M x 36

32MB

NONE

(1) 16M x 36

(1) 16M x 36

32MB

NONE

(1) 32M x 36

NONE

32MB

NONE

NONE

(1) 32M x 36

33MB

(4) 256K x 9

(1) 16M x 36

(1) 16M x 36

33MB

(1) 4M x 9

(1) 1M x 36

(1) 16M x 36

33MB

(1) 4M x 9

(1) 16M x 36

(1) 1M x 36

36MB

(1) 1M x 9

(1) 16M x 36

(1) 16M x 36

36MB

(1) 4M x 9

(1) 4M x 36

(1) 16M x 36

36MB

(1) 4M x 9

(1) 16M x 36

(1) 4M x 36

48MB

(1) 4M x 9

(1) 16M x 36

(1) 16M x 36

64MB

(1) 16M x 9

NONE

NONE

64MB

NONE

(1) 32M x 36

(1) 32M x 36

65MB

(1) 16M x 9

(1) 1M x 36

NONE

65MB

(1) 16M x 9

NONE

(1) 1M x 36

66MB

(1) 16M x 9

(1) 1M x 36

(1) 1M x 36

68MB

(1) 16M x 9

(1) 4M x 36

NONE

68MB

(1) 16M x 9

NONE

(1) 4M x 36

69MB

(1) 16M x 9

(1) 1M x 36

(1) 4M x 36

69MB

(1) 16M x 9

(1) 4M x 36

(1) 1M x 36

DRAM CONFIGURATION (CONT.)

Size

Bank 0

Bank 1

Bank 2

72MB

(1) 16M x 9

(1) 4M x 36

(1) 4M x 36

80MB

(1) 16M x 9

(1) 16M x 36

NONE

80MB

(1) 16M x 9

NONE

(1) 16M x 36

81MB

(1) 16M x 9

(1) 1M x 36

(1) 16M x 36

81MB

(1) 16M x 9

(1) 16M x 36

(1) 1M x 36

84MB

(1) 16M x 9

(1) 4M x 36

(1) 16M x 36

84MB

(1) 16M x 9

(1) 16M x 36

(1) 4M x 36

96MB

(1) 16M x 9

(1) 16M x 36

(1) 16M x 36

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

64KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

128KB

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JC1

JC2

JC3

JC4

JC5

JC7

JCX1

CX486S

2 & 3

2 & 3

Closed

Open

Open

1 & 2

Open

CX486S/CX487S

1 & 2

1 & 2

Closed

Open

Open

1 & 2

Closed

CX487S

1 & 2

1 & 2

Closed

Open

Open

1 & 2

Closed

80486SL

1 & 2

1 & 2

Closed

Open

Closed

1 & 2

Open

80486SX

2 & 3

2 & 3

Open

Open

Closed

1 & 2

Open

CX486DX

1 & 2

1 & 2

Closed

Open

Open

1 & 2

Closed

80486DX

1 & 2

1 & 2

Closed

Open

Closed

1 & 2

Open

ODP486SX

1 & 2

1 & 2

Closed

Open

Closed

1 & 2

Open

80486DX2

1 & 2

1 & 2

Closed

Open

Closed

1 & 2

Open

Pentium Overdrive

1 & 2

1 & 2

Open

Closed

Open

2 & 3

Open

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONT.)

Type

JCX2

JP2

JX2

RN12

RN13

CX486S

pins 2 & 3

pins 2 & 3

pins 2 & 3

Not installed

Installed

80486SL

pins 1 & 2

pins 2 & 3

pins 2 & 3

Installed

Not installed

80486SX

pins 1 & 2

pins 2 & 3

pins 2 & 3

Not installed

Not installed

CX486DX

pins 1 & 2

pins 2 & 3

pins 2 & 3

Not installed

Installed

80486DX

pins 1 & 2

pins 1 & 2

pins 1 & 2

Not installed

Not installed

ODP486SX

pins 1 & 2

pins 2 & 3

pins 2 & 3

Installed

Not installed

80486DX2

pins 1 & 2

pins 1 & 2

pins 1 & 2

Not installed

Not installed

Pentium Overdrive

pins 1 & 2

pins 1 & 2

pins 1 & 2

Installed

Not installed

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JK1

JK2

JK3

JK4

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

33MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

40MHz

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

50iMHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

50MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

66iMHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

KEYBOARD CONTROL SELECT

Keyboard

JX3

RN1

RN2

Internal

pins 2 & 3 closed

Not installed

Installed

External

pins 1 & 2 closed

Installed

Not installed

MISCELLANEOUS TECHNICAL NOTES

When U15 is installed JP5 and JP6 should be set to pins 2 & 3 closed.

When U15 is not installed, JP5 and JP6 should be set to pins 1 & 2 closed.

The exact location for U15 is unknown.

The exact function of X2 is unknown.