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NT924 (REV. 2)

NIAGARA SMD TECHNOLOGY, INC.

NT924 (REV. 2)

Processor

AM K5/CX M1/Pentium

Processor Speed

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

Chip Set

Intel

Maximum Onboard Memory

128MB

Cache

256/512KB

BIOS

Award/Phoenix

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 interface, serial ports (2), cache slot, IR connector

NPU Options

None

CONNECTIONS

Function

Label

Function

Label

IDE interface 1

IDE1

IDE interface LED

J13

IDE interface 2

IDE2

Green PC LED

J14

PS/2 mouse interface

J3

Turbo LED

J15

Serial port 1

J4

Reset switch

J16

Serial port 2

J6

Speaker

J17

Floppy drive interface

J7

Power LED & keylock

J18

Parallel port

J8

IR connector

JP2

Chassis fan power

J9

32-bit PCI slots

PC1 - PC4

Green PC connector

J12

Cache slot

SL1

USER CONFIGURABLE SETTINGS

Setting

Label

Position

 

Keyboard clock select depends on ISA clock

JP4

Pins 1 & 2 closed

 

Keyboard clock select set at 12MHz

JP4

Pins 2 & 3 closed

 

BIOS type select normal operation

JP6

Pins 1 & 2 closed

 

BIOS type select flash mode

JP6

Pins 2 & 3 closed

Flash BIOS voltage select 5v

JP7

Pins 1 & 2 closed

 

Flash BIOS voltage select 12v

JP7

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 32

None

8MB

(2) 512K x 32

(2) 512K x 32

10MB

(2) 1M x 32

(2) 256K x 32

10MB

(2) 256K x 32

(2) 1M x 32

12MB

(2) 1M x 32

(2) 512K x 32

12MB

(2) 512K x 32

(2) 1M x 32

16MB

(2) 2M x 32

None

16MB

(2) 1M x 32

(2) 1M x 32

18MB

(2) 2M x 32

(2) 256K x 32

18MB

(2) 256K x 32

(2) 2M x 32

20MB

(2) 2M x 32

(2) 512K x 32

20MB

(2) 512K x 32

(2) 2M x 32

24MB

(2) 2M x 32

(2) 1M x 32

24MB

(2) 1M x 32

(2) 2M x 32

32MB

(2) 4M x 32

None

32MB

(2) 2M x 32

(2) 2M x 32

34MB

(2) 4M x 32

(2) 256K x 32

34MB

(2) 256K x 32

(2) 4M x 32

36MB

(2) 4M x 32

(2) 512K x 32

36MB

(2) 512K x 32

(2) 4M x 32

40MB

(2) 4M x 32

(2) 1M x 32

40MB

(2) 1M x 32

(2) 4M x 32

48MB

(2) 4M x 32

(2) 2M x 32

48MB

(2) 2M x 32

(2) 4M x 32

64MB

(2) 8M x 32

None

64MB

(2) 4M x 32

(2) 4M x 32

66MB

(2) 8M x 32

(2) 256K x 32

66MB

(2) 256K x 32

(2) 8M x 32

68MB

(2) 8M x 32

(2) 512K x 32

68MB

(2) 512K x 32

(2) 8M x 32

72MB

(2) 8M x 32

(2) 1M x 32

72MB

(2) 1M x 32

(2) 8M x 32

DRAM CONFIGURATION

Size

Bank 0

Bank 1

80MB

(2) 8M x 32

(2) 2M x 32

80MB

(2) 2M x 32

(2) 8M x 32

96MB

(2) 8M x 32

(2) 4M x 32

96MB

(2) 4M x 32

(2) 8M x 32

128MB

(2) 8M x 32

(2) 8M x 32

Note: Board accepts EDO memory.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

SL1

256KB (A)

(2) 32K x 32

None

(1) 8K/16K x 8

Not installed

256KB (B)

None

None

None

256KB module installed

512KB (A)

(2) 32K x 32

(2) 32K x 32

(1) 16K/32K x 8

Not installed

512KB (B)

None

None

None

512KB module installed

Note: The location of banks 0 & 1 are unidentified.

CACHE JUMPER CONFIGURATION

Size

JP10

JP11

256KB (A/B)

Pins 1 & 2 closed

Pins 1 & 2 closed

512KB (A/B)

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU SPEED SELECTION (CYRIX)

CPU speed

Clock speed

Multiplier

JP3

JP12

JP13

JPS1

JPS2

120MHz

50MHz

2x

1 & 2

2 & 3

1 & 2

Closed

Closed

150MHz

60MHz

2x

2 & 3

2 & 3

1 & 2

Closed

Open

166MHz

66MHz

2x

2 & 3

2 & 3

1 & 2

Open

Closed

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP3

JP12

JP13

JPS1

JPS2

75MHz

50MHz

1.5x

1 & 2

2 & 3

2 & 3

Closed

Closed

90MHz

60MHz

1.5x

2 & 3

2 & 3

2 & 3

Closed

Open

100MHz

66MHz

1.5x

2 & 3

2 & 3

2 & 3

Open

Closed

120MHz

60MHz

2x

2 & 3

2 & 3

1 & 2

Closed

Open

133MHz

66MHz

2x

2 & 3

2 & 3

1 & 2

Open

Closed

150MHz

60MHz

2.5x

2 & 3

1 & 2

1 & 2

Closed

Open

166MHz

66MHz

2.5x

2 & 3

1 & 2

1 & 2

Open

Closed

180MHz

60MHz

3x

2 & 3

1 & 2

2 & 3

Closed

Open

200MHz

66MHz

3x

2 & 3

1 & 2

2 & 3

Open

Closed

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Setting

JP8A

JP8B

JP8C

JP8D

CX M1

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

AM K5

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

P54C/CTB

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

P55C

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed