...because we can't all be on the bleeding edge...





LEO 486-GAV

FIRST INTERNATIONAL COMPUTER, INC.

LEO 486-GAV

Processor

80486SL/80486DX/80486DX2/80486DX4/Pentium Overdrive

Processor Speed

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

Chip Set

VIA

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, (2), serial ports (2), VGA feature connector, VGA connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port (6-pin DIN)

CN2

VGA connector

J5

PS/2 mouse connector

CN4

Turbo LED

J20

Serial port 1

CN5

Turbo switch

J21

Serial port 2

CN6

Reset switch

J22

Parallel port

CN8

Speaker

J23

Floppy drive interface

CN9

Power LED & keylock

J24

IDE interface

CN10

3.3V daughter board (80486DX4 only)

J32

Video feature connector

CN11

Green status LED

J35

External battery

J1

Hardware sleep

J36

Green PC power

J3

32-bit VESA Local bus slot

S1

IDE interface LED

J4

32-bit VESA Local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

IDE connector pin 27 open

J2

Open

 

IDE connector pin 27 linked to IOCHRDY signal

J2

Closed

IDE connector pin 28 open

J6

Open

 

IDE connector pin 28 linked to BALE signal

J6

Closed

CMOS memory normal operation

J7

pins 1 & 2 closed

 

CMOS memory clear

J7

pins 2 & 3 closed

Factory configured - do not alter

J11

pins 1 & 2 closed

Factory configured - do not alter

J25

N/A

80486DX4 clock mode 2.5x

J31

pins 1 & 2 closed

 

80486DX4 clock mode 2x

J31

pins 2 & 3 closed

 

80486DX4 clock mode 3x

J31

Open

Factory configured - do not alter

J33

pins 2 & 3 closed

Pentium Overdrive write-back

JC8

pins 1 & 2 closed

 

Pentium Overdrive write-through

JC8

pins 2 & 3 closed

Factory configured - do not alter

JH

pins 2 & 3 closed

Factory configured - do not alter

JX6

pins 2 & 3 closed

Video upper physical address decode input select SA (26..31)

JV5

pins 1 & 2 closed

 

Video upper physical address decode input select SAUP (1..2)

JV5

pins 2 & 3 closed

Video DAC local access enabled

JV6

pins 1 & 2 closed

 

Video DAC local access disabled

JV6

pins 2 & 3 closed

Video memory address select 256KB

JV11

pins 1 & 2 closed

 

Video memory address select 64KB

JV11

pins 2 & 3 closed

Normal operation

JV12

pins 1 & 2 closed

 

Other IDE/VGA controller is installed at S1

JV12

pins 2 & 3 closed

Normal operation

JV13

pins 1 & 2 closed

 

Other IDE/VGA controller is installed at S2

JV13

pins 2 & 3 closed

CPU clock 1x

JX1

pins 1 & 2 closed

 

CPU clock 2x

JX1

pins 2 & 3 closed

IDE CONFIGURATION

IDE

Speed

J8

J9

J10

Enabled

0

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

Enabled

1

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

Enabled

2

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Disabled

N/A

N/A

N/A

pins 2 & 3 closed

PARALLEL PORT CONFIGURATION

Port

JG

JH

Input

pins 1 & 2 closed

pins 1 & 2 closed

Output

pins 1 & 2 closed

pins 2 & 3 closed

Bi-directional

pins 2 & 3 closed

N/A

VRAM CONFIGURATION

Video

IRQ9

JV3

JV4

Enabled

Disabled

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

Enabled

pins 1 & 2 closed

pins 2 & 3 closed

VRAM MEMORY CONFIGURATION

Size

Bank 0

Bank 1

1MB

(2) 512K x 4

NONE

2MB

(2) 512K x 4

(2) 512K x 4

VIDEO MCLK SELECT

MCLK

J18

J19

50MHz

Open

Open

 

52MHz

Open

Closed

 

45MHz

Closed

Closed

 

38MHz

Closed

Open

MONITOR REFRESH RATE

Rate

JV7

JV8

43Hz interlaced

pins 2 & 3 closed

pins 2 & 3 closed

 

56Hz non-interlaced

pins 2 & 3 closed

pins 1 & 2 closed

 

60Hz non-interlaced

pins 1 & 2 closed

pins 2 & 3 closed

 

70/72Hz non-interlaced

pins 1 & 2 closed

pins 1 & 2 closed

VIDEO INTERLEAVE TIMING

Select

JV9

JV10

1 NanoSeconds

pins 1 & 2 closed

pins 1 & 2 closed

 

2 NanoSeconds

pins 1 & 2 closed

pins 2 & 3 closed

 

3 NanoSeconds

pins 2 & 3 closed

pins 1 & 2 closed

 

4 NanoSeconds

pins 2 & 3 closed

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

NONE

NONE

NONE

1MB

NONE

(1) 256K x 36

NONE

NONE

1MB

NONE

NONE

(1) 256K x 36

NONE

2MB

(1) 256K x 36

(1) 256K x 36

NONE

NONE

2MB

(1) 256K x 36

NONE

(1) 256K x 36

NONE

2MB

NONE

NONE

(1) 256K x 36

(1) 256K x 36

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

NONE

3MB

NONE

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

3MB

(1) 256K x 36

NONE

(1) 256K x 36

(1) 256K x 36

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

4MB

(1) 1M x 36

NONE

NONE

NONE

4MB

NONE

(1) 1M x 36

NONE

NONE

4MB

NONE

NONE

(1) 1M x 36

NONE

5MB

(1) 1M x 36

(1) 256K x 36

NONE

NONE

5MB

(1) 256K x 36

(1) 1M x 36

NONE

NONE

5MB

(1) 256K x 36

NONE

(1) 1M x 36

NONE

5MB

(1) 1M x 36

NONE

(1) 256K x 36

NONE

5MB

NONE

(1) 256K x 36

(1) 4M x 36

NONE

5MB

NONE

(1) 4M x 36

(1) 256K x 36

NONE

6MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

NONE

6MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

NONE

6MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

NONE

6MB

NONE

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

6MB

(1) 1M x 36

NONE

(1) 256K x 36

(1) 256K x 36

7MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

7MB

(1) 256K x 36

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

8MB

(1) 1M x 36

NONE

(1) 1M x 36

NONE

8MB

NONE

NONE

(1) 1M x 36

(1) 1M x 36

8MB

NONE

(1) 1M x 36

NONE

(1) 1M x 36

9MB

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

NONE

9MB

(1) 1M x 36

(1) 256K x 36

(1) 1M x 36

NONE

9MB

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

NONE

9MB

NONE

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

9MB

(1) 256K x 36

NONE

(1) 1M x 36

(1) 1M x 36

10MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

10MB

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

12MB

NONE

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

DRAM CONFIGURATION (CONTINUED)

Size

Bank 0

Bank 1

Bank 2

Bank 3

12MB

(1) 1M x 36

NONE

(1) 1M x 36

(1) 1M x 36

13MB

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

13MB

(1) 1M x 36

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

16MB

NONE

(1) 4M x 36

NONE

NONE

16MB

NONE

NONE

(1) 4M x 36

NONE

17MB

(1) 4M x 36

(1) 256K x 36

NONE

NONE

17MB

(1) 256K x 36

(1) 4M x 36

NONE

NONE

17MB

(1) 256K x 36

NONE

(1) 4M x 36

NONE

17MB

NONE

(1) 4M x 36

(1) 256K x 36

NONE

17MB

NONE

(1) 256K x 36

(1) 4M x 36

NONE

18MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

NONE

18MB

(1) 256K x 36

(1) 256K x 36

(1) 4M x 36

NONE

18MB

(1) 256K x 36

(1) 4M x 36

(1) 256K x 36

NONE

18MB

NONE

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

19MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

19MB

(1) 256K x 36

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

20MB

(1) 4M x 36

(1) 1M x 36

NONE

NONE

20MB

(1) 1M x 36

(1) 4M x 36

NONE

NONE

20MB

(1) 1M x 36

NONE

(1) 4M x 36

NONE

20MB

NONE

(1) 1M x 36

(1) 4M x 36

NONE

20MB

NONE

(1) 4M x 36

(1) 1M x 36

NONE

21MB

(1) 4M x 36

(1) 1M x 36

(1) 256K x 36

NONE

21MB

(1) 256K x 36

(1) 1M x 36

(1) 4M x 36

NONE

21MB

(1) 256K x 36

(1) 4M x 36

(1) 1M x 36

NONE

21MB

(1) 1M x 36

(1) 256K x 36

(1) 4M x 36

NONE

21MB

(1) 1M x 36

(1) 4M x 36

(1) 256K x 36

NONE

22MB

(1) 4M x 36

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

22MB

(1) 1M x 36

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

24MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

NONE

24MB

(1) 1M x 36

(1) 4M x 36

(1) 1M x 36

NONE

24MB

NONE

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

25MB

(1) 256K x 36

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

28MB

(1) 1M x 36

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

NONE

(1) 4M x 36

(1) 4M x 36

NONE

32MB

NONE

NONE

(1) 4M x 36

(1) 4M x 36

33MB

(1) 4M x 36

(1) 4M x 36

(1) 256K x 36

NONE

DRAM CONFIGURATION (CONTINUED)

Size

Bank 0

Bank 1

Bank 2

Bank 3

33MB

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

NONE

33MB

NONE

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

33MB

(1) 256K x 36

NONE

(1) 4M x 36

(1) 4M x 36

34MB

(1) 4M x 36

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

34MB

(1) 256K x 36

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

36MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

NONE

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

NONE

36MB

NONE

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

36MB

(1) 1M x 36

NONE

(1) 4M x 36

(1) 4M x 36

37MB

(1) 256K x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

37MB

(1) 1M x 36

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

40MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

48MB

NONE

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

49MB

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

52MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

NONE

(1) 8M x 36

NONE

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

NONE

(4) 32K x 8

(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 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

CPU TYPE CONFIGURATION

Type

JC1

JC2

JC3

JC4

JC6

80486SX

pins 2 & 3

pins 2 & 3

Open

pins 1 & 2

Open

CX486S

pins 2 & 3

pins 2 & 3

Open

pins 1 & 2

Closed

CX486S+

pins 1 & 2

pins 1 & 2

Open

pins 1 & 2

Open

CX487S

pins 1 & 2

pins 1 & 2

Open

pins 1 & 2

Open

AM486DXL

pins 1 & 2

pins 1 & 2

Open

pins 1 & 2

Closed

CX486DX

pins 1 & 2

pins 1 & 2

Open

pins 1 & 2

Open

80486DX

pins 1 & 2

pins 1 & 2

Open

pins 1 & 2

Closed

80486DX2

pins 1 & 2

pins 1 & 2

Open

pins 1 & 2

Closed

80486DX4

pins 1 & 2

pins 1 & 2

Open

pins 1 & 2

Closed

Pentium Overdrive

pins 1 & 2

pins 1 & 2

Closed

pins 2 & 3

Closed

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONTINUED)

Type

JC5

RN40

RN41

RN46

80486SX

Open

Not installed

Not installed

Not installed

CX486S

Open

Installed

Not installed

Not installed

CX486S+

Open

Installed

Not installed

Not installed

CX487S

Open

Installed

Not installed

Not installed

AM486DXL

Open

Not installed

Not installed

Installed

CX486DX

Open

Installed

Not installed

Not installed

80486DX

Open

Not installed

Not installed

Not installed

80486DX2

Open

Not installed

Not installed

Not installed

80486DX4

Closed

Not installed

Installed

Not installed

Pentium Overdrive

Closed

Not installed

Not installed

Not installed

CPU TYPE CONFIGURATION (MANUFACTURER)

Type

J17

J34

Intel

pins 1 & 2 closed

pins 1 & 2 closed

Cyrix

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE IRQ SELECTION

Select

J13

JX2

JX5

IRQ15

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

SMI

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

Note:Jumper pins 1 & 2 of J13 if JX2 and JX5 are set at SMI and you wish to use the IRQ15 function.

KEYBOARD CONFIGURATION

Select

JX3

JX4

RN3

RN6

RN10

RN11

External

pins 1 & 2

pins 1 & 2

Not installed

Installed

Not installed

Installed

Internal

pins 2 & 3

pins 2 & 3

Installed

Not installed

Installed

Not installed

Note:Pins designated should be in the closed position.

VESA WAIT STATE/BUS SPEED CONFIGURATION

CPU speed

Wait states

JV1

JV2

< 33MHz

0 wait states

pins 2 & 3 closed

pins 2 & 3 closed

> 33MHz

1 wait state

pins 1 & 2 closed

pins 1 & 2 closed

PC87332 ECP DMA CHANNEL SELECT

DREQ

DACK

JP1

JP2

1

1

pins 2 & 3 closed

pins 2 & 3 closed

3

3

pins 1 & 2 closed

pins 1 & 2 closed

NSS87311/312 BASE I/O ADDRESS SELECT

Index Address

Data Address

JF

26Eh

26Fh

pins 1 & 2 closed

398h

399h

pins 2 & 3 closed

NSS87332 BASE I/O ADDRESS SELECT

Index Address

Data Address

JF

JG

2Eh

2Fh

pins 1 & 2 closed

pins 1 & 2 closed

26Eh

26Fh

pins 1 & 2 closed

pins 2 & 3 closed

15Ch

15Dh

pins 2 & 3 closed

pins 1 & 2 closed

398h

399h

pins 2 & 3 closed

pins 2 & 3 closed