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P55-ET

EPOX COMPUTER CO., LTD.

P55-ET

Processor

Pentium

Processor Speed

75/90/100/120/133/150/166MHz

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, PS/2 mouse interface, serial ports (2), cache slot, VRM connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 2

CN1

Turbo switch

J4

Serial port 1

CN2

Turbo LED

J5

Parallel port

CN3

Green PC LED

J6

Floppy drive interface

CN4

Chassis fan power

J7

IDE interface 2

CN5

PS/2 mouse interface

J10

IDE interface 1

CN6

IDE interface LED

JP5

PS/2 mouse port

CN7

Green PC connector

JP14

Power LED & keylock

J1

32-bit PCI slots

PC1 PC4

Speaker

J2

Cache slot

SL1

Reset switch

J3

VRM connector

VRM

USER CONFIGURABLE SETTINGS

Function

Label

Position

On board I/O enabled

J24

Open

 

On board I/O disabled

J24

Closed

Flash BIOS voltage select 5v

JP6

Pins 1 & 2 closed

 

Flash BIOS voltage select 12v

JP6

Pins 2 & 3 closed

Factory configured - do not alter

JP12

Unidentified

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. Board also accepts x 32 SIMMs.

CACHE CONFIGURATION

Size

Bank 0

SL1

TAG

256KB (A)

(2) 32K x 32

Not installed

(1) 8K/16K x 8

512KB (B)

(2) 64K x 32

Not installed

(1) 16K/32K x 8

512KB (A)

(2) 32K x 32

256KB module installed

(1) 16K/32K x 8

CACHE JUMPER CONFIGURATION

Size

JP10

JP11

256KB (A)

Pins 1 & 2 closed

Pins 1 & 2 closed

512KB (B)

Pins 1 & 2 closed

Pins 1 & 2 closed

512KB (A)

Pins 2 & 3 closed

Pins 2 & 3 closed

ON BOARD CACHE CONFIGURATION

Setting

TP1

Enabled

Open

Disabled

Pins 1 & 2, 3 & 4 closed

CPU SPEED SELECTION

CPU speed

Clock speed

Multiplier

J25

JP7

JP9

JPS1

JPS2

75MHz

50MHz

1.5x

1 & 2

2 & 3

2 & 3

Open

Open

90MHz

60MHz

1.5x

2 & 3

2 & 3

2 & 3

Closed

Open

100MHz

66MHz

1.5x

2 & 3

2 & 3

2 & 3

Closed

Closed

120MHz

60MHz

2x

2 & 3

1 & 2

2 & 3

Closed

Open

133MHz

66MHz

2x

2 & 3

1 & 2

2 & 3

Closed

Closed

150MHz

60MHz

2.5x

2 & 3

1 & 2

1 & 2

Closed

Open

166MHz

66MHz

2.5x

2 & 3

1 & 2

1 & 2

Closed

Closed

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JP1

P54C

Pins 1 & 2 closed

P55C

Pins 2 & 3 closed

KEYBOARD CLOCK SELECTION

Setting

JP15A

JP15B

Set by system AT CLOCK

Pins 1 & 2 closed

Pins 1 & 2 closed

 

Clock rate 12MHz

Pins 2 & 3 closed

Pins 2 & 3 closed