ABIT COMPUTER CORPORATION

PN5 PCI (REV. 1.2)

Processor

CX M1/AM K5/Pentium

Processor Speed

75/90/100/120/133/150/166/180/200MHz

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

256MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), cache slot, IR connector, USB connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 2

CN1

Turbo LED

J7 pins 4 & 6

Serial port 1

CN2

Green PC connector

J7 pins 8 & 10

Parallel port

CN3

Speaker

J7 pins 14/15/17/19

Floppy drive interface

CN4

Reset switch

J7 pins 18 & 20

IDE interface 2

CN5

IR connector

JP2

IDE interface 1

CN6

USB connector

JP28

PS/2 mouse port

J3

32-bit PCI slots

PC1 - PC3

IDE interface LED

J6

Cache slot

SL1

Power LED & keylock

J7 pins 1/3/5/7/9

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

On board I/O enabled

JP4

Open

 

On board I/O disabled

JP4

Closed

»

CMOS memory normal operation

JP26

Open

 

CMOS memory clear

JP26

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 32

None

16MB

(2) 2M x 32

None

16MB

(2) 1M x 32

(2) 1M x 32

24MB

(2) 2M x 32

(2) 1M x 32

32MB

(2) 4M x 32

None

32MB

(2) 2M x 32

(2) 2M x 32

40MB

(2) 4M x 32

(2) 1M x 32

48MB

(2) 4M x 32

(2) 2M x 32

64MB

(2) 8M x 32

None

64MB

(2) 4M x 32

(2) 4M x 32

72MB

(2) 8M x 32

(2) 1M x 32

80MB

(2) 8M x 32

(2) 2M x 32

96MB

(2) 8M x 32

(2) 4M x 32

128MB

(2) 8M x 32

(2) 8M x 32

128MB

(2) 16M x 32

None

136MB

(2) 16M x 32

(2) 1M x 32

144MB

(2) 16M x 32

(2) 2M x 32

160MB

(2) 16M x 32

(2) 4M x 32

192MB

(2) 16M x 32

(2) 8M x 32

256MB

(2) 16M x 32

(2) 16M x 32

Note: Board accepts EDO memory. Banks are interchangeable.

DRAM REFRESH RATE CONFIGURATION

Setting

DS/1

 

60MHz

On

»

66MHz

Off

CACHE CONFIGURATION

Size

Bank 0

SL1

TAG

256KB

(2) 32K x 32

Not installed

(1) 32K x 8

512KB

(2) 32K x 32

256KB module installed

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP20

256KB

Open

Open

Open

512KB

Closed

Closed

Closed

CPU SPEED SELECTION (CYRIX)

CPU speed

Clock speed

Multiplier

DS/2

DS/3

DS/4

DS/5

DS/6

120MHz

50MHz

2x

Off

On

On

On

Off

133MHz

55MHz

2x

On

Off

Off

On

Off

150MHz

60MHz

2x

On

On

Off

On

Off

166MHz

66MHz

2x

On

Off

On

On

Off

CPU SPEED SELECTION (AMD)

CPU speed

CPU type

Clock speed

Multiplier

DS/2

DS/3

DS/4

DS/5

DS/6

75MHz

SSA/5

50MHz

1.5x

Off

On

On

Off

Off

75MHz

SSA/5

66MHz

1x

On

Off

On

On

Off

90MHz

SSA/5

55MHz

1.5x

On

Off

Off

Off

Off

90MHz

SSA/5

60MHz

1.5x

On

On

Off

Off

Off

100MHz

SSA/5

66MHz

1.5x

On

Off

On

Off

Off

100MHz

K5

55MHz

1.5x

On

Off

Off

Off

Off

100MHz

K5

50MHz

1.5x

Off

On

On

Off

Off

120MHz

K5

60MHz

1.5x

On

On

Off

Off

Off

133MHz

K5

66MHz

1.5x

On

Off

On

Off

Off

150MHz

K5

60MHz

2x

On

On

Off

On

Off

166MHz

K5

66MHz

2x

On

Off

On

On

Off

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

DS/2

DS/3

DS/4

DS/5

DS/6

75MHz

50MHz

1.5x

Off

On

On

Off

Off

90MHz

60MHz

1.5x

On

On

Off

Off

Off

100MHz

66MHz

1.5x

On

Off

On

Off

Off

120MHz

60MHz

2x

On

On

Off

On

Off

133MHz

66MHz

2x

On

Off

On

On

Off

150MHz

60MHz

2.5x

On

On

Off

On

On

166MHz

66MHz

2.5x

On

Off

On

On

On

180MHz

60MHz

3x

On

On

Off

Off

On

200MHz

66MHz

3x

On

Off

On

Off

On

CPU VOLTAGE SELECTION

Voltage

JP22

JP23

»

3.38v (STD/VR)

Open

Pins 3 & 6 closed

 

3.52v (VRE)

Pins 1 - 4 closed

Pins 1 & 4 closed