...because we can't all be on the bleeding edge...





PI4/PI4T PCI

ABIT COMPUTER CORPORATION

PI4/PI4T PCI

Processor

80486SX/SL80486SX/CX486M7/AM486DX/AM486DXL PLUS/80486DX/ SL80486DX2/AM486DX2/80486DX2/AM486DX4/80486DX4/P24D/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

128/256/512/1024KB

BIOS

AMI/Award

Dimensions

330mm x 218mm

I/O Options

32-bit PCI bus slots (3), green PC connector, IDE interfaces (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J3

Speaker

J10

IDE interface (primary)

J4

Power LED & keylock

J11

IDE interface (secondary)

J5

IDE interface LED

JP10

Green PC connector

J6

IDE interface LED

JP11

Turbo LED

J7

Green PC connector

JP38

Reset switch

J8

32-bit PCI bus slots

SL1 - SL3

Turbo switch

J9

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CX486S2 CPU not installed

JP1

Open

 

CX486S2 CPU installed

JP1

Closed

»

Cache type select write back (P24D only)

JP2

pins 1 & 2 closed

 

Cache type select write through (P24D only)

JP2

pins 2 & 3 closed

»

Cache type select write back (P24T only)

JP3

pins 1 & 2 closed

 

Cache type select write through (P24T only)

JP3

pins 2 & 3 closed

»

Primary IDE IRQ14 enabled

JP12

Closed

 

Primary IDE IRQ14 disabled

JP12

Open

»

Secondary IDE IRQ15 enabled

JP13

Closed

 

Secondary IDE IRQ15 disabled

JP13

Open

»

Factory configured - do not alter

JP14

pins 2 & 3 closed

»

Factory configured - do not alter

JP26

pins 2 & 3 closed

»

Factory configured - do not alter

JP27

pins 2 & 3 closed

»

Factory configured - do not alter

JP28

pins 2 & 3, 4 & 5 closed

»

Factory configured - do not alter

JP40

pins 1 & 2 closed

»

Factory configured - do not alter

JP43

pins 2 & 3 closed

»

Monitor type select color

JP44

Closed

 

Monitor type select monochrome

JP44

Open

Note: The location of the factory configured jumpers is unidentified.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

8MB

(1) 2M x 36

NONE

NONE

NONE

12MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

(1) 1M x 36

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 2M x 36

(1) 2M x 36

NONE

NONE

16MB

(1) 4M x 36

NONE

NONE

NONE

17MB

(1) 256K x 36

(1) 4M x 36

NONE

NONE

20MB

(1) 512K x 36

(1) 512K x 36

(1) 4M x 36

NONE

20MB

(1) 1M x 36

(1) 4M x 36

NONE

NONE

24MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

(1) 4M x 36

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

NONE

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

NONE

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

(1) 8M x 36

NONE

NONE

NONE

36MB

(1) 512K x 36

(1) 512K x 36

(1) 4M x 36

(1) 4M x 36

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

NONE

36MB

(1) 1M x 36

(1) 8M x 36

NONE

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

40MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

NONE

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

48MB

(1) 4M x 36

(1) 8M x 36

NONE

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 16M x 36

NONE

NONE

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

NONE

64MB

(1) 8M x 36

(1) 8M x 36

NONE

NONE

65MB

(1) 256K x 36

(1) 16M x 36

NONE

NONE

68MB

(1) 1M x 36

(1) 16M x 36

NONE

NONE

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

NONE

72MB

(1) 1M x 36

(1) 1M x 36

(1) 16M x 36

NONE

72MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

80MB

(1) 4M x 36

(1) 16M x 36

NONE

NONE

80MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

NONE

96MB

(1) 4M x 36

(1) 4M x 36

(1) 16M x 36

NONE

96MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

NONE

128MB

(1) 16M x 36

(1) 16M x 36

NONE

NONE

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB

(4) 64K x 8

NONE

(1) 32K x 8

512KB

(4) 64K x 8

(4) 64K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 64K x 8

CACHE JUMPER CONFIGURATION

Size

JP23

JP24

JP25

JP36

JP37

128KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2, 3 & 4

256KB

2 & 3

1 & 2

2 & 3

1 & 2

2 & 3, 4 & 5

256KB

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2, 3 & 4

512KB

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3, 4 & 5

512KB

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2, 3 & 4

1MB

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3, 4 & 5

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP4

JP7

JP8

JP9

JP15

80486SX

1 & 2, 3 & 4

Open

Open

2 & 3

Open

SL80486SX

1 & 2, 3 & 4

3 & 4

Open

2 & 3

Open

CX486M7 (3v)

Open

2 & 3

2 & 3

1 & 2, 3 & 4

3 & 4

CX486M7 (5v)

1 & 2, 3 & 4

2 & 3

2 & 3

1 & 2, 3 & 4

3 & 4

AM486DX/DX2 (5v)

1 & 2, 3 & 4

Open

Open

1 & 2, 3 & 4

3 & 4

AM486DX2/DX4 (3v)

Open

Open

Open

1 & 2, 3 & 4

3 & 4

AM486DXL PLUS

1 & 2, 3 & 4

3 & 4

Open

1 & 2, 3 & 4

3 & 4

80486DX/DX2

1 & 2, 3 & 4

Open

Open

1 & 2, 3 & 4

3 & 4

SL80486DX/DX2

1 & 2, 3 & 4

3 & 4

Open

1 & 2, 3 & 4

3 & 4

80486DX4

Open

3 & 4

Open

1 & 2, 3 & 4

3 & 4

P24D

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2, 3 & 4

3 & 4

P24T

1 & 2, 3 & 4

3 & 4

1 & 2

1 & 2, 3 & 4

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP16

JP17

JP18

JP19

80486SX

2 & 3

Open

Open

Open

SL80486SX

2 & 3

Open

1 & 2

Open

CX486M7 (3v)

1 & 2

Open

1 & 2

Open

CX486M7 (5v)

1 & 2

Open

1 & 2

Open

AM486DX/DX2 (5v)

Open

Open

Open

Open

AM486DX2/DX4 (3v)

Open

Open

Open

Open

AM486DXL PLUS

2 & 3

Open

1 & 2

2 & 3

80486DX/DX2

2 & 3

Open

Open

Open

SL80486DX/DX2

2 & 3

Open

1 & 2

Open

80486DX4

2 & 3

Open

1 & 2

Open

P24D

1 & 2

1 & 2

1 & 2

1 & 2

P24T

1 & 2

1 & 2

1 & 2

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP20

JP21

JP22

JP39

80486SX

Open

Open

Open

1 & 2

SL80486SX

2 & 3

1 & 2

4 & 5

1 & 2

CX486M7 (3v)

1 & 2

Open

2 & 3

1 & 2

CX486M7 (5v)

1 & 2

Open

2 & 3

1 & 2

AM486DX/DX2 (5v)

Open

Open

Open

1 & 2

AM486DX2/DX4 (3v)

Open

Open

Open

1 & 2

AM486DXL PLUS

2 & 3

4 & 5

4 & 5

1 & 2

80486DX/DX2

Open

Open

Open

1 & 2

SL80486DX/DX2

2 & 3

1 & 2

4 & 5

1 & 2

80486DX4

2 & 3

1 & 2

4 & 5

Open

P24D

2 & 3

2 & 3

4 & 5

1 & 2

P24T

2 & 3

Open

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP46

JP47

JP48

JP49

JP50

AM486DX2

Open

Closed

Open

Closed

Closed

CX486DX2-50

Closed

Open

Open

Open

Open

CX486DX2-66

Open

Open

Closed

Open

Open

CX486DX2-80

Open

Open

Open

Closed

Open

AM486DX/DX4

Open

Closed

Open

Closed

Open

80486DX4-75

Closed

Open

Open

Open

Open

80486DX4-100

Open

Closed

Open

Closed

Open

Note: Pins designated should be in the closed position. These settings used only if JP4 is open.

CPU SPEED CONFIGURATION

Speed

JP30

JP31

JP32

JP33

25MHz

Open

Open

Open

pins 1 & 2 closed

33MHz

Open

Closed

Closed

pins 1 & 2 closed

40MHz

Open

Open

Closed

pins 2 & 3 closed

50iMHz

Open

Open

Open

pins 1 & 2 closed

50MHz

Open

Closed

Open

pins 2 & 3 closed

66iMHz

Open

Closed

Closed

pins 1 & 2 closed

75iMHz

Open

Open

Open

pins 1 & 2 closed

80iMHz

Open

Open

Closed

pins 2 & 3 closed

100iMHz

Open

Closed

Closed

pins 1 & 2 closed

CMOS DISCHARGE CONFIGURATION

Setting

JP6

JP35

CMOS memory normal operation

pins 1 & 2 closed

pins 1 & 2 closed

CMOS memory clear

pins 2 & 3 closed

pins 2 & 3 closed