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486F55

FREE COMPUTER TECHNOLOGY, INC.

486F55

Processor

CX486S/AM486SX/80486SX/CX486S2/AM486SX2/80486SX2/ ODP487/80487SX/CX486DX/80486DX/CX486DX2/AM486DX2/ (SL)AM486DX2(WB)/(SL)AM486DX2(WT)/80486DX2/AM486DX4/ (SL)AM486DX4(WB)/(SL)AM486DX4(WT)/80486DX4/P24D/P24CT/ P24C(WB)/P24T

Processor Speed

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

Chip Set

SIS

Video Chip Set

None

Maximum Onboard Memory

256MB

Maximum Video Memory

None

Cache

128/256/512KB

BIOS

Award

Dimensions

254mm x 218mm

I/O Options

32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port

CN1

Turbo switch

J2

Serial port

CN2

Green PC connector

J3

Parallel port

CN3

Turbo LED

J4

Floppy drive interface

CN4

Reset switch

J5

IDE interface 2

CN5

Power LED & keylock

J6

IDE interface 1

CN6

Speaker

J7

IDE interface LED

J1

32-bit PCI slots

PC1 - PC3

USER CONFIGURABLE SETTINGS

Function

Label

Position

Ľ

CMOS memory normal operation

JP2

Pins 1 & 2 closed

 

CMOS clear

JP2

Pins 2 & 3 closed

 

BIOS type select EPROM

JP3

Open

 

Flash BIOS type select 12v

JP3

Pins 1 & 2, 4 & 5 closed

 

Flash BIOS type select 5v

JP3

Pins 2 & 3, 4 & 5 closed

Ľ

Parallel port IRQ select IRQ7

JP6

Pins 1 & 2 closed

 

Parallel port IRQ select IRQ5

JP6

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

4MB

None

(1) 512K x 36

None

(1) 512K x 36

4MB

(1) 512K x 36

None

(1) 512K x 36

None

4MB

(1) 512K x 36

None

None

(1) 512K x 36

4MB

None

(1) 512K x 36

None

(1) 512K x 36

4MB

(1) 256K x 36

(1) 256K x 36

None

(1) 512K x 36

4MB

None

(1) 512K x 36

(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

10MB

(1) 2M x 36

None

None

(1) 512K x 36

10MB

(1) 512K x 36

None

None

(1) 2M x 36

10MB

None

(1) 2M x 36

None

(1) 512K x 36

10MB

None

(1) 512K x 36

None

(1) 2M x 36

10MB

(1) 1M x 36

(1) 1M x 36

None

(1) 512K x 36

10MB

(1) 256K x 36

(1) 256K x 36

None

(1) 2M x 36

13MB

(1) 256K x 36

(1) 1M 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

None

(1) 2M x 36

None

(1) 2M x 36

16MB

(1) 2M x 36

None

(1) 2M x 36

None

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

16MB

(1) 2M x 36

None

None

(1) 2M x 36

16MB

None

(1) 2M x 36

None

(1) 2M x 36

16MB

(1) 1M x 36

(1) 1M x 36

None

(1) 2M x 36

16MB

None

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

19MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

34MB

(1) 8M x 36

None

None

(1) 512K x 36

34MB

(1) 512K x 36

None

None

(1) 8M x 36

34MB

None

(1) 8M x 36

None

(1) 512K x 36

34MB

None

(1) 512K x 36

None

(1) 8M x 36

34MB

(1) 4M x 36

(1) 4M x 36

None

(1) 512K x 36

34MB

(1) 256K x 36

(1) 256K x 36

None

(1) 8M x 36

40MB

(1) 8M x 36

None

None

(1) 2M x 36

40MB

(1) 2M x 36

None

None

(1) 8M x 36

40MB

None

(1) 8M x 36

None

(1) 2M x 36

40MB

None

(1) 2M x 36

None

(1) 8M x 36

40MB

(1) 4M x 36

(1) 4M x 36

None

(1) 2M x 36

40MB

(1) 1M x 36

(1) 1M x 36

None

(1) 8M 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

64MB

(1) 8M x 36

None

None

(1) 8M x 36

64MB

None

(1) 8M x 36

None

(1) 8M x 36

64MB

(1) 4M x 36

(1) 4M x 36

None

(1) 8M x 36

64MB

None

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

67MB

(1) 16M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

76MB

(1) 16M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

112MB

(1) 16M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

130MB

(1) 16M x 36

(1) 16M x 36

None

(1) 512K x 36

130MB

(1) 32M x 36

None

None

(1) 512K x 36

130MB

(1) 512K x 36

None

None

(1) 32M x 36

130MB

None

(1) 32M x 36

None

(1) 512K x 36

130MB

None

(1) 512K x 36

None

(1) 32M x 36

130MB

(1) 256K x 36

(1) 256K x 36

None

(1) 32M x 36

136MB

(1) 16M x 36

(1) 16M x 36

None

(1) 2M x 36

136MB

(1) 32M x 36

None

None

(1) 2M x 36

136MB

(1) 2M x 36

None

None

(1) 32M x 36

136MB

None

(1) 32M x 36

None

(1) 2M x 36

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

136MB

None

(1) 2M x 36

None

(1) 32M x 36

136MB

(1) 1M x 36

(1) 1M x 36

None

(1) 32M x 36

160MB

(1) 16M x 36

(1) 16M x 36

None

(1) 8M x 36

160MB

None

(1) 8M x 36

None

(1) 32M x 36

160MB

(1) 32M x 36

None

None

(1) 8M x 36

160MB

None

(1) 32M x 36

None

(1) 8M x 36

160MB

None

(1) 8M x 36

None

(1) 32M x 36

160MB

(1) 4M x 36

(1) 4M x 36

None

(1) 32M x 36

193MB

(1) 256K x 36

(1) 16M x 36

(1) 16M x 36

(1) 16M x 36

196MB

(1) 1M x 36

(1) 16M x 36

(1) 16M x 36

(1) 16M x 36

208MB

(1) 4M x 36

(1) 16M x 36

(1) 16M x 36

(1) 16M x 36

256MB

(1) 16M x 36

(1) 16M x 36

(1) 16M x 36

(1) 16M x 36

256MB

(1) 16M x 36

(1) 16M x 36

None

(1) 32M x 36

256MB

(1) 32M x 36

None

(1) 32M x 36

None

256MB

(1) 32M x 36

None

None

(1) 32M x 36

256MB

None

(1) 32M x 36

None

(1) 32M x 36

256MB

None

(1) 32M x 36

(1) 16M x 36

(1) 16M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

None

(1) 8K/16K/32K x 8

256KB (A)

(4) 64K x 8

None

(1) 16K/32K x 8

256KB (B)

(4) 32K x 8

(4) 32K x 8

(1) 16K/32K x 8

512KB

(4) 128K x 8

None

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP15

JP16

JP20

128KB

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

256KB (A)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

256KB (B)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

512KB

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

JP22

JP23

25MHz

Open

Open

33MHz

Closed

Closed

40MHz

Open

Closed

50iMHz

Open

Open

66iMHz

Closed

Closed

75iMHz

Open

Open

100iMHz

Closed

Closed

CPU TYPE SELECTION

Type

JP8

JP9

JP10

JP11

CX486S

Open

1 & 2, 5 & 6

2 & 3, 5 & 6, 7 & 8

1 & 2, 4 & 5, 6 & 7

AM486SX

Open

1 & 2, 4 & 5

2 & 3, 4 & 5, 6 & 7

3 & 4, 5 & 6

80486SX

Open

1 & 2, 4 & 5

2 & 3, 4 & 5, 6 & 7

3 & 4, 5 & 6

CX486S2

Open

1 & 2, 5 & 6

2 & 3, 5 & 6, 7 & 8

4 & 5, 6 & 7

AM486SX2

Open

1 & 2, 4 & 5

2 & 3, 4 & 5, 6 & 7

3 & 4, 5 & 6

80486SX2

Open

1 & 2, 4 & 5

2 & 3, 4 & 5, 6 & 7

3 & 4, 5 & 6

ODP487

Open

1 & 2, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

80487SX

Open

1 & 2, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

CX486DX

Open

1 & 2, 5 & 6

1 & 2, 5 & 6, 7 & 8

4 & 5, 6 & 7

80486DX

Open

1 & 2, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

CX486DX2

Open

1 & 2, 5 & 6

1 & 2, 5 & 6, 7 & 8

4 & 5, 6 & 7

AM486DX2

Open

1 & 2, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6

(SL)AM486DX2 (WB)

2 & 3

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6

(SL)AM486DX2 (WT)

2 & 3

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

80486DX2

Open

1 & 2, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

AM486DX4

Open

1 & 2, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6

(SL)AM486DX4 (WB)

Open

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6

(SL)AM486DX4 (WT)

Open

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

80486DX4

Open

1 & 2, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

P24D

Open

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

P24CT

Open

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

P24C (WB)

Open

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

P24T

Open

2 & 3, 4 & 5

1 & 2, 4 & 5, 6 & 7

3 & 4, 5 & 6, 7 & 8

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION

Voltage

JP17

JP18

JP19

3.3v (Intel/AMD 3v CPU)

Open

Open

Open

3.6v (Cyrix 3v CPU)

Closed

Open

Open

5v

Open

Closed

Closed

DMA CHANNEL SELECTION

Channel

JP4

JP5

Ľ

1

Pins 1 & 2 closed

Pins 1 & 2 closed

 

3

Pins 2 & 3 closed

Pins 2 & 3 closed