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ATLAS PCI - II

AMERICAN MEGATRENDS, INC.

ATLAS PCI - II

Processor

Pentium

Processor Speed

75/90/100/120/133MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

256MB DRAM (EDO supported)

Maximum Video Memory

None

Cache

256/512/1024KB

BIOS

AMI

Dimensions

254mm x 203mm

I/O Options

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

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

IDE interface 2

J1

Green PC connector

J27

Serial port 1

J3

Reset switch

J29

Serial port 2

J4

Turbo LED

J33

Parallel port

J6

IDE interface LED

J34

Floppy drive interface

J7

Green VGA interface

J42

IDE interface 1

J8

Chassis fan power

J46

PS/2 mouse interface

J13

32-bit PCI slots

PC1 - PC4

Power LED & keylock

J19

Cache slot

SL1

Speaker

J22

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Jumper information unidentified

J20

N/A

 

Jumper information unidentified

J31

N/A

PS/2 mouse IRQ12 enabled

J38

Pins 1 & 2 closed

 

PS/2 mouse IRQ12 disabled

J38

Pins 2 & 3 closed

 

Jumper information unidentified

J45

N/A

 

Jumper information unidentified

J47

N/A

 

Jumper information unidentified

J50

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

2MB

(2) 256K x 36

None

4MB

(2) 512K x 36

None

4MB

(2) 256K x 36

(2) 256K x 36

6MB

(2) 512K x 36

(2) 256K x 36

6MB

(2) 256K x 36

(2) 512K x 36

8MB

(2) 1M x 36

None

8MB

(2) 512K x 36

(2) 512K x 36

10MB

(2) 1M x 36

(2) 256K x 36

10MB

(2) 256K x 36

(2) 1M x 36

12MB

(2) 1M x 36

(2) 512K x 36

12MB

(2) 512K x 36

(2) 1M x 36

16MB

(2) 2M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

18MB

(2) 2M x 36

(2) 256K x 36

18MB

(2) 256K x 36

(2) 2M x 36

20MB

(2) 2M x 36

(2) 512K x 36

20MB

(2) 512K x 36

(2) 2M x 36

24MB

(2) 2M x 36

(2) 1M x 36

24MB

(2) 1M x 36

(2) 2M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

DRAM CONFIGURATION (CONT)

Size

Bank 0

Bank 1

34MB

(2) 4M x 36

(2) 256K x 36

34MB

(2) 256K x 36

(2) 4M x 36

36MB

(2) 4M x 36

(2) 512K x 36

36MB

(2) 512K x 36

(2) 4M x 36

40MB

(2) 4M x 36

(2) 1M x 36

40MB

(2) 1M x 36

(2) 4M x 36

48MB

(2) 4M x 36

(2) 2M x 36

48MB

(2) 2M x 36

(2) 4M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

66MB

(2) 8M x 36

(2) 256K x 36

66MB

(2) 256K x 36

(2) 8M x 36

68MB

(2) 8M x 36

(2) 512K x 36

68MB

(2) 512K x 36

(2) 8M x 36

72MB

(2) 8M x 36

(2) 1M x 36

72MB

(2) 1M x 36

(2) 8M x 36

80MB

(2) 8M x 36

(2) 2M x 36

80MB

(2) 2M x 36

(2) 8M x 36

96MB

(2) 8M x 36

(2) 4M x 36

96MB

(2) 4M x 36

(2) 8M x 36

128MB

(2) 16M x 36

None

128MB

(2) 8M x 36

(2) 8M x 36

130MB

(2) 16M x 36

(2) 256K x 36

132MB

(2) 16M x 36

(2) 512K x 36

136MB

(2) 16M x 36

(2) 1M x 36

144MB

(2) 16M x 36

(2) 2M x 36

160MB

(2) 16M x 36

(2) 4M x 36

192MB

(2) 16M x 36

(2) 8M x 36

256MB

(2) 16M x 36

(2) 16M x 36

Note: Board accepts EDO memory.

CACHE CONFIGURATION

Size

Bank 0

SL1

256KB (A)

(8) 32K x 8

Not installed

256KB (B)

None

Installed

512KB (A)

(8) 64K x 8

Not installed

512KB (B)

None

Installed

1MB (C)

(8) 128K x 8

Not installed

1MB (C)

None

Installed

CACHE JUMPER CONFIGURATION

Size

J16

J26

J28

256KB (A)

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB (B)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

512KB (A)

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

512KB (B)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

1MB (C)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

1MB (C)

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CACHE TYPE CONFIGURATION

Setting

J30

SMT cache enabled

Pins 1 & 2 closed

SMT cache disabled

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

J24

J25

J37

J39

75MHz

Closed

Closed

Open

Open

90MHz

Closed

Open

Open

Open

100MHz

Open

Closed

Open

Open

120MHz

Closed

Open

Open

Closed

133MHz

Open

Closed

Open

Closed

CPU TYPE SELECTION

Type

J11

VR

Pins 1 & 2 closed

VRE

Pins 2 & 3 closed

CPU VOLTAGE SELECTION

Voltage

J2

J12

J21

From regulator

Open

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

From regulator & VRM

Open

1 & 2, 3 & 4, 5 & 6

Open

From 3.3v power supply

1 & 2, 3 & 4, 5 & 6

Open

1 & 2, 3 & 4, 5 & 6