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419

FORCOM TECHNOLOGY CORPORATION

419

Processor

80486SX/CX486S/80487SX/CX486S2/80486DX/Am486DX/CX486DX/ODP486SX/80486DX2/Am468DX2/Cx486DX2/80486DX4/Pentium Overdrive

Processor Speed

20/25/33/40/50/50(internal)/66i/75i/100iMHz

Chip Set

OPTI

Max. Onboard DRAM

128MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

220mm x 260mm

I/O Options

32-bit VESA local bus slots (3), Green PC feature

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Green monitor power supply

JP63

Power LED & keylock

JP2

External power management interface

JP68

Turbo LED

JP16

Reset switch

S1

Turbo switch

JP17

32-bit VESA Local bus slots

SL1,SL2,SL3

Speaker

JP18

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP30

Closed

 

Monitor type select monochrome

JP30

Open

Normal CPU ADS# operation

JP36

pins 2 & 3

 

Delay CPU ADS# clock operation

JP36

pins 1 & 2

Power to CPU set at 5V

JP64

pins 1 & 3, 2 & 4

 

Power to CPU set at 3.3V (for Intel DX4 CPU)

JP64

pins 4 & 6, 3 & 5

 

Set CPU external operation clock to 3X

JP65

Open

 

Set CPU external operation clock to 2X

JP65

Closed

 

Cache size enabled 64KB or 256KB

JP67

Closed

 

Cache size enabled 128KB or 512KB

JP67

Open

Note:Jumper JP65, for any type of CPU other than above listed, leave "Open".

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

(1) 256K x 36

(1) 256K x 36

NONE

NONE

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

5MB

(1) 256K x 36

(1) 1M x 36

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

10MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

12MB

(1) 1M x 36

NONE

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

20MB

(1) 1M x 36

(1) 4M x 36

NONE

NONE

20MB

(1) 1M x 36

NONE

(1) 4M x 36

NONE

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

64MB

(1) 16M x 36

NONE

NONE

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

128MB

(1) 16M x 36

(1) 16M x 36

NONE

NONE

128MB

(1) 16M x 36

NONE

(1) 16M 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

(4) 32K x 8

NONE

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP10

JP11

JP13

JP50

64KB

Open

Open

pins 2 & 3 closed

Open

128KB

Open

Closed

pins 1 & 2 closed

Open

256KB

Closed

Closed

pins 2 & 3 closed

Open

512KB

Closed

Closed

pins 1 & 2 closed

Closed

INTERNAL CACHE TYPE CONFIGURATION

CPU Type

Internal Cache Type

JP58

JP59

P24T

Write-Through

Open

N/A

P24T

Write-Back

Closed

N/A

P24D

Write-Through

N/A

Open

P24D

Write-Back

N/A

Closed

CPU TYPE CONFIGURATION

CPU Type

JP3

JP5

JP8

JP42

JP43

JP44

80486SX

Open

Open

pins 2 & 3

Open

pins 1 & 2

Open

AM486

pins 1 & 2

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Cx486S

Open

Open

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

80487SX

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Cx486S2

Open

Open

pins 2 & 3

pins 2 & 3

pins 2 & 3

Open

80486DX

pins 1 & 2

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Cx486DX

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 1 & 2

Open

Cx486DX2

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 2 & 3

Open

P24C (DX4)

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

Closed

P24T

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

P24D

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Note:Pins designated are in the closed position.

CPU TYPE CONFIGURATION (CONTINUED)

CPU Type

JP45

JP46

JP47

JP48

JP49

80486SX

Open

Open

Open

Open

pins 1 & 2

AMD486

Open

Open

Open

Open

pins 1 & 2

Cx486S

Open

Open

Closed

Closed

pins 1 & 2

80487SX

Open

Open

Open

Open

pins 1 & 2

Cx486S2

Open

Open

Closed

Closed

pins 2 & 3

80486DX

Open

Open

Open

Open

pins 1 & 2

Cx486DX

Open

Open

Closed

Closed

pins 1 & 2

Cx486DX2

Open

Open

Closed

Closed

pins 2 & 3

P24C (DX4)

Closed

Closed

Open

Open

pins 1 & 2

P24T

Open

Open

Open

Open

pins 1 & 2

P24D

Open

Open

Open

Open

pins 1 & 2

Note:Pins designated are in the closed position.

CPU TYPE (S-SERIES) CONFIGURATION

CPU Type

JP3

JP5

JP8

JP42

JP43

JP44

80486SX

Open

Open

pins 2 & 3

pins 1 & 2

pins 1 & 2

Closed

80486DX

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

Closed

Note:Pins designated are in the closed position.

CPU TYPE (S-SERIES) CONFIGURATION

CPU Type

JP45

JP46

JP47

JP48

JP49

80486SX

Closed

Closed

Open

Open

pins 1 & 2

80486DX

Closed

Closed

Open

Open

pins 1 & 2

Note:Pins designated are in the closed position.

BUS SPEED (ID3) CONFIGURATION

CPU speed

JP34

<= 33MHz

Open

> 33MHz

Closed

VESA WAIT STATE (ID2) CONFIGURATION

Wait states

JP33

0 wait states

Open

1 wait state

Closed

SYSTEM CLOCK (NOT FOR P24C) CONFIGURATION

Frequency

JP21

JP22

JP23

20MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

40MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

50MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

SYSTEM CLOCK (FOR P24C (DX4)) CONFIGURATION

Frequency

JP21

JP22

JP23

25MHz

pins 2 & 3 closed

Open

pins 2 & 3 closed

33MHz

Open

pins 2 & 3 closed

pins 2 & 3 closed

50MHz

Open

pins 2 & 3 closed

Open