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80486

FIRST INTERNATIONAL COMPUTER, INC.

80486

Processor

CX486M6/80486SX/AM486DX/CX486M7/UMC U5/80486DX/ 80486DX2/80486DX4/P24D/P24T

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

64MB

Maximum Video Memory

None

Cache

64/128/256/512/1024KB

BIOS

AMI/Award

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (3), green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Reset switch

JP20

Power LED & keylock

JP15

Turbo switch

JP22

Speaker

JP18

Green PC connector

JP23

Turbo LED

JP19

32-bit VESA local bus slots

SL1 - SL3

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Battery type select external

JP1

Closed

 

Battery type select internal

JP1

Pins 2 & 3 closed

 

CMOS memory clear

JP1

Pins 3 & 4 closed

Ľ

Factory configured - do not alter

JP2

Open

 

Flash BIOS voltage select 12v

JP3

Pins 2 & 3 closed

 

Flash BIOS voltage select 5v

JP3

Pins 1 & 2 closed

Ľ

Factory configured - do not alter

JP36

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(1) 256K x 36

None

None

1MB

None

(1) 256K x 36

None

2MB

(1) 256K x 36

(1) 256K x 36

None

2MB

None

(1) 256K x 36

(4) 256K x 9

3MB

(1) 256K x 36

(1) 256K x 36

(4) 256K x 9

4MB

(1) 1M x 36

None

None

4MB

None

(1) 1M x 36

None

5MB

(1) 1M x 36

(1) 256K x 36

None

5MB

(1) 256K x 36

(1) 1M x 36

None

5MB

None

(1) 1M x 36

(4) 256K x 9

6MB

(1) 256K x 36

(1) 256K x 36

(4) 1M x 9

6MB

(1) 256K x 36

(1) 1M x 36

(4) 256K x 9

6MB

(1) 1M x 36

(1) 256K x 36

(4) 256K x 9

8MB

(1) 2M x 36

None

None

8MB

(1) 1M x 36

(1) 1M x 36

None

8MB

None

(1) 2M x 36

None

9MB

(1) 2M x 36

(1) 256K x 36

None

9MB

(1) 256K x 36

(1) 1M x 36

(4) 1M x 9

9MB

(1) 1M x 36

(1) 256K x 36

(4) 1M x 9

9MB

None

(1) 2M x 36

(4) 256K x 9

9MB

(1) 1M x 36

(1) 1M x 36

(4) 256K x 9

10MB

(1) 256K x 36

(1) 2M x 36

(4) 256K x 9

12MB

(1) 2M x 36

(1) 1M x 36

None

12MB

(1) 1M x 36

(1) 1M x 36

(4) 1M x 9

13MB

(1) 256K x 36

(1) 2M x 36

(4) 1M x 9

13MB

(1) 1M x 36

(1) 2M x 36

(4) 256K x 9

16MB

(1) 4M x 36

None

None

16MB

None

(1) 4M x 36

None

16MB

(1) 1M x 36

(1) 2M x 36

(4) 1M x 9

17MB

(1) 4M x 36

(1) 256K x 36

None

17MB

(1) 256K x 36

(1) 4M x 36

None

17MB

None

(1) 256K x 36

(4) 4M x 9

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

17MB

(1) 256K x 36

None

(4) 4M x 9

17MB

None

(1) 4M x 36

(4) 256K x 9

18MB

(1) 256K x 36

(1) 256K x 36

(4) 4M x 9

18MB

(1) 256K x 36

(1) 4M x 36

(4) 256K x 9

18MB

(1) 4M x 36

(1) 256K x 36

(4) 256K x 9

20MB

(1) 4M x 36

(1) 1M x 36

None

20MB

(1) 1M x 36

(1) 4M x 36

None

20MB

None

(1) 1M x 36

(4) 4M x 9

21MB

(1) 256K x 36

(1) 1M x 36

(4) 4M x 9

21MB

(1) 1M x 36

(1) 256K x 36

(4) 4M x 9

21MB

(1) 256K x 36

(1) 4M x 36

(4) 1M x 9

21MB

(1) 4M x 36

(1) 256K x 36

(4) 1M x 9

21MB

(1) 1M x 36

(1) 4M x 36

(4) 256K x 9

21MB

(1) 4M x 36

(1) 1M x 36

(4) 256K x 9

24MB

(1) 2M x 36

(1) 4M x 36

None

24MB

None

(1) 2M x 36

(4) 4M x 9

24MB

(1) 1M x 36

(1) 1M x 36

(4) 4M x 9

24MB

(1) 1M x 36

(1) 4M x 36

(4) 1M x 9

24MB

(1) 4M x 36

(1) 1M x 36

(4) 1M x 9

25MB

(1) 256K x 36

(1) 2M x 36

(4) 4M x 9

25MB

(1) 1M x 36

(1) 2M x 36

(4) 4M x 9

25MB

(1) 4M x 36

(1) 2M x 36

(4) 256K x 9

28MB

(1) 4M x 36

(1) 2M x 36

(4) 1M x 9

32MB

(1) 8M x 36

None

None

32MB

(1) 4M x 36

(1) 4M x 36

None

32MB

None

(1) 8M x 36

None

32MB

None

(1) 4M x 36

(4) 4M x 9

33MB

(1) 8M x 36

(1) 256K x 36

None

33MB

(1) 256K x 36

(1) 8M x 36

None

33MB

(1) 256K x 36

(1) 4M x 36

(4) 4M x 9

33MB

(1) 4M x 36

(1) 256K x 36

(4) 4M x 9

33MB

None

(1) 8M x 36

(4) 256K x 9

33MB

(1) 4M x 36

(1) 4M x 36

(4) 256K x 9

34MB

(1) 256K x 36

(1) 8M x 36

(4) 256K x 9

36MB

(1) 8M x 36

(1) 1M x 36

None

36MB

(1) 1M x 36

(1) 8M x 36

None

36MB

(1) 1M x 36

(1) 4M x 36

(4) 4M x 9

36MB

(1) 4M x 36

(1) 1M x 36

(4) 4M x 9

36MB

(1) 4M x 36

(1) 4M x 36

(4) 1M x 9

37MB

(1) 256K x 36

(1) 8M x 36

(4) 1M x 9

37MB

(1) 1M x 36

(1) 8M x 36

(4) 256K x 9

40MB

(1) 2M x 36

(1) 8M x 36

None

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

40MB

(1) 4M x 36

(1) 2M x 36

(4) 4M x 9

40MB

(1) 1M x 36

(1) 8M x 36

(4) 1M x 9

48MB

(1) 4M x 36

(1) 8M x 36

None

48MB

(1) 8M x 36

(1) 4M x 36

None

48MB

None

(1) 8M x 36

(4) 4M x 9

48MB

(1) 4M x 36

(1) 4M x 36

(4) 4M x 9

49MB

(1) 256K x 36

(1) 8M x 36

(4) 4M x 9

49MB

(1) 4M x 36

(1) 8M x 36

(4) 256K x 9

52MB

(1) 1M x 36

(1) 8M x 36

(4) 4M x 9

52MB

(1) 4M x 36

(1) 8M x 36

(4) 1M x 9

64MB

(1) 8M x 36

(1) 8M x 36

None

64MB

(1) 4M x 36

(1) 8M x 36

(4) 4M x 9

Note: There may be other valid configurations in addition to those shown above.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB (A)

(1) 16K x 8

(1) 16K x 8

(1) 8K x 8

128KB (B)

(4) 32K x 8

None

(1) 8K x 8

256KB (A)

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB (B)

(4) 64K x 8

None

(1) 32K x 8

512KB (A)

(4) 64K x 8

(4) 64K x 8

(1) 32K x 8

512KB (B)

(4) 128K x 8

None

(1) 32K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 64K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP10

JP11

JP12

JP13

JP14

64KB

2 & 3

2 & 3

Open

Open

Open

Open

128KB (A)

2 & 3

2 & 3

Open

Open

Open

Closed

128KB (B)

1 & 2

1 & 2

Open

Open

Open

Closed

256KB (A)

2 & 3

2 & 3

Open

Open

Closed

Closed

256KB (B)

1 & 2, 3 & 4

1 & 2

Open

Closed

Closed

Closed

512KB (A)

2 & 3, 4 & 5

2 & 3

Open

Closed

Closed

Closed

512KB (B)

1 & 2, 3 & 4, 5 & 6

1 & 2

Open

Closed

Closed

Closed

1MB

2 & 3, 4 & 5, 6 & 7

2 & 3

Closed

Closed

Closed

Closed

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION

Speed

JP6

JP7

JP8

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Open

Closed

50MHz

Closed

Open

Open

66iMHz

Closed

Closed

Closed

75iMHz

Open

Open

Closed

80iMHz

Open

Closed

Closed

100iMHz

Closed

Closed

Closed

CPU TYPE SELECTION

Type

JP27

JP28

JP29

CX486M6

2 & 3, 4 & 5

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

80486SX

Open

2 & 3

Open

AM486DX

Open

2 & 3

Open

CX486M7

2 & 3

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

UMC U5

Open

2 & 3

2 & 3

80486DX

Open

2 & 3

Open

80486DX2

Open

2 & 3

Open

80486DX4

1 & 2, 3 & 4

1 & 2

1 & 2

P24D

1 & 2, 3 & 4

1 & 2, 4 & 5

1 & 2, 4 & 5

P24T

1 & 2, 3 & 4

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CONíT)

Type

JP30

JP32

JP33

CX486M6

1 & 2, 3 & 4, 5 & 6

Open

2 & 3

80486SX

Open

Open

2 & 3

AM486DX

Open

1 & 2

1 & 2, 3 & 4

CX486M7

2 & 3, 4 & 5

1 & 2

1 & 2, 3 & 4

UMC U5

1 & 2

3 & 4

2 & 3

80486DX

Open

1 & 2

1 & 2, 3 & 4

80486DX2

Open

1 & 2

1 & 2, 3 & 4

80486DX4

5 & 6

1 & 2

1 & 2, 3 & 4

P24D

3 & 4, 5 & 6

1 & 2

1 & 2, 3 & 4

P24T

5 & 6

2 & 3

1 & 2, 3 & 4

Note: Pins designated should be in the closed position.

CPU MULTIPLIER SELECTION (AMD)

Multiplier

JP34

2x

Closed

3x

Open

CPU MULTIPLIER SELECTION (INTEL)

Multiplier

JP31

2x

Pins 2 & 3 closed

2.5x

Pins 1 & 2 closed

3x

Open

CPU VOLTAGE SELECTION

Voltage

JP24

JP25

JP26

JP35

3.3v

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Closed

4v

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

5v

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Open

VL BUS WAIT STATE SELECTION

Setting

JP17

0

Open

1

Closed

VL-BUS SPEED SELECTION

Setting

JP16

<= 33MHz

Open

>33 MHz

Closed