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P55-TX 2

EPOX COMPUTER CO., LTD.

P55-TX 2

Device Type

Mainboard

Processor

CX 6X86/IBM 6X86/CX 6X86L/IBM 6X86L/CX 686MX/IBM 6X86MX/

AM K5/AM K6/Pentium/Pentium MMX

Processor Speed

100/120/133/150/166/188/200/225/233/266/300/333MHz

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

256MB (EDO & SDRAM supported)

Maximum Video Memory

None

Cache

512KB

BIOS

Award

Dimensions

305mm x 208mm

I/O Options

32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connector, ATX power connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

ATX power connector

ATX

Serial port 1

JP10

USB connector

CN1

PS/2 mouse port

JP13

IR connector

J4

Power LED & keylock

JP14A

IDE interface 1

J5

Speaker

JP14B

IDE interface 2

J6

Reset switch

JP14C

Floppy drive interface

J7

Green PC connector

JP14D

Parallel port

J8

Green PC LED

JP14E

CPU fan power

JP1

Turbo LED

JP14F

Soft off power supply

JP9

IDE interface LED

JP14G

Serial port 2

J11

32-bit PCI slots

PC1 PC4

USER CONFIGURABLE SETTINGS

Function

Label

Position

Keyboard power on disabled

JP2

Pins 2 & 3 closed

 

Keyboard power on enabled

JP2

Pins 1 & 2 closed

CMOS memory normal operation

JP8

Pins 1 & 2 closed

 

CMOS memory clear

JP8

Pins 2 & 3 closed

SIMM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 36

None

16MB

(2) 2M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

24MB

(2) 2M x 36

(2) 1M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 4M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

Note: Board accepts EDO memory.

DIMM CONFIGURATION

Size

Bank 2

Bank 3

8MB

(1) 1M x 64

None

16MB

(1) 2M x 64

None

16MB

(1) 1M x 64

(1) 1M x 64

24MB

(1) 2M x 64

(1) 1M x 64

32MB

(1) 4M x 64

None

32MB

(1) 2M x 64

(1) 2M x 64

40MB

(1) 4M x 64

(1) 1M x 64

48MB

(1) 4M x 64

(1) 2M x 64

64MB

(1) 8M x 64

None

64MB

(1) 4M x 64

(1) 4M x 64

72MB

(1) 8M x 64

(1) 1M x 64

80MB

(1) 8M x 64

(1) 2M x 64

96MB

(1) 8M x 64

(1) 4M x 64

128MB

(1) 8M x 64

(1) 8M x 64

Note: Board accepts EDO & SDRAM memory.

DIMM VOLTAGE CONFIGURATION

Voltage

JP7

3.3v

Pins 1 & 2, 3 & 4 closed

 

5v

Pins 5 & 6, 7 & 8 closed

Note: The location of JP7 is unidentified.

CACHE CONFIGURATION

Size

Bank 0

TAG

512KB

(1) 64K x 64

Unidentified

CPU SPEED SELECTION (CX 6X86)

CPU speed

Clock speed

Multiplier

JP4

150MHz

60MHz

2x

Pins 3 & 4 closed

166MHz

66MHz

2x

Pins 5 & 6 closed

200MHz

75MHz

2x

Pins 7 & 8 closed

CPU SPEED SELECTION (IBM 6X86)

CPU speed

Clock speed

Multiplier

JP4

150MHz

60MHz

2x

Pins 3 & 4 closed

166MHz

66MHz

2x

Pins 5 & 6 closed

200MHz

75MHz

2x

Pins 7 & 8 closed

CPU SPEED SELECTION (CX 6X86L)

CPU speed

Clock speed

Multiplier

JP4

150MHz

60MHz

2x

Pins 3 & 4 closed

166MHz

66MHz

2x

Pins 5 & 6 closed

200MHz

75MHz

2x

Pins 7 & 8 closed

CPU SPEED SELECTION (IBM 6X86L)

CPU speed

Clock speed

Multiplier

JP4

150MHz

60MHz

2x

Pins 3 & 4 closed

166MHz

66MHz

2x

Pins 5 & 6 closed

200MHz

75MHz

2x

Pins 7 & 8 closed

CPU SPEED SELECTION (CX 6X86MX)

CPU speed

Clock speed

Multiplier

JP4

166MHz

60MHz

2.5x

Pins 9 & 10 closed

200MHz

66MHz

2.5x

Pins 11 & 12 closed

233MHz

75MHz

2.5x

Pins 13 & 14 closed

233MHz

66MHz

3x

Pins 15 & 16 closed

266MHz

75MHz

3x

Pins 17 & 18 closed

266MHz

66MHz

3.5x

Pins 19 & 20 closed

CPU SPEED SELECTION (IBM 6X86MX)

CPU speed

Clock speed

Multiplier

JP4

166MHz

60MHz

2.5x

Pins 9 & 10 closed

200MHz

66MHz

2.5x

Pins 11 & 12 closed

233MHz

75MHz

2.5x

Pins 13 & 14 closed

233MHz

66MHz

3x

Pins 15 & 16 closed

266MHz

75MHz

3x

Pins 17 & 18 closed

266MHz

66MHz

3.5x

Pins 19 & 20 closed

CPU SPEED SELECTION (AM K5)

CPU speed

Clock speed

Multiplier

JP4

100MHz

66MHz

1.5x

Pins 1 & 2 closed

120MHz

60MHz

2x

Pins 3 & 4 closed

133MHz

66MHz

2x

Pins 5 & 6 closed

150MHz

60MHz

2.5x

Pins 9 & 10 closed

166MHz

66MHz

2.5x

Pins 11 & 12 closed

188MHz

75MHz

2.5x

Pins 13 & 14 closed

200MHz

66MHz

3x

Pins 15 & 16 closed

CPU SPEED SELECTION (AM K6)

CPU speed

Clock speed

Multiplier

JP4

166MHz

66MHz

2.5x

Pins 11 & 12 closed

200MHz

66MHz

3x

Pins 15 & 16 closed

233MHz

66MHz

3.5x

Pins 19 & 20 closed

266MHz

66MHz

4x

Pins 21 & 22 closed

300MHz

60MHz

5x

Pins 23 & 24 closed

333MHz

66MHz

5x

Pins 25 & 26 closed

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP4

100MHz

66MHz

1.5x

Pins 1 & 2 closed

120MHz

60MHz

2x

Pins 3 & 4 closed

133MHz

66MHz

2x

Pins 5 & 6 closed

150MHz

60MHz

2.5x

Pins 9 & 10 closed

150MHz

75MHz

2x

Pins 7 & 8 closed

166MHz

66MHz

2.5x

Pins 11 & 12 closed

188MHz

75MHz

2.5x

Pins 13 & 14 closed

200MHz

66MHz

3x

Pins 15 & 16 closed

CPU SPEED SELECTION (INTEL MMX)

CPU speed

Clock speed

Multiplier

JP4

166MHz

66MHz

2.5x

Pins 11 & 12 closed

200MHz

66MHz

3x

Pins 15 & 16 closed

233MHz

66MHz

3.5x

Pins 19 & 20 closed

CPU VOLTAGE SELECTION

Voltage

J18

2.0v

Pins 1 & 6 closed

2.1v

Pins 5 & 10 closed

2.8v

Pins 2 & 7 closed

2.9v

Pins 3 & 8 closed

3.2v

Pins 4 & 9 closed

FLASH BIOS SELECTION

Setting

J9

J10

5v

Pins 2 & 3 closed

Pins 2 & 3 closed

 

12v

Pins 1 & 2 closed

Pins 1 & 2 closed