Tomcat I  (S1562S)  Jumper Settings

J13,

J13

J19

J20

CPU Speed

BUS Speed

1-2, 3-4

OFF

OFF

75 MHz

50MHz - PCI=25MHz

3-4

OFF

OFF

90MHz

60MHz - PCI=30MHz

1-2

OFF

OFF

100MHz

66.67MHz - PCI=33MHz

3-4

ON

OFF

120MHz

60MHz - PCI=30MHz

1-2

ON

OFF

133MHz

66.67MHz - PCI=33MHz

3-4

ON

ON

150MHz

60MHz - PCI=30MHz

1-2

ON

ON

166MHz

66.67MHz - PCI=33MHz

1-2

OFF

ON

200MHz

66MHz - PCI=33MHz

1-2, 3-4

ON

OFF

Cyrix P120+

50MHz - PCI=25MHz

3-4

ON

OFF

Cyrix P150+

60MHz - PCI=30MHz

1-2

ON

OFF

Cyrix P166+

66.67MHz - PCI=33MHz
19-20: CPU Speed

J37-39: Voltage Regulator Settings for P54C

BOLD = DEFAULT

3.3V

3.48V

3.6V

J37

ON

OFF

OFF

J38

OFF

OFF

ON

J39

OFF

ON

OFF

Default values are for the Intel Pentium P54C.

U14, U27, J0-41:  Settings for P55C

U14 (3.5V)

J37

OFF (3.6V)

J38

ON (3.5V)

J39

OFF (3.3V)

 

U27 (2.8V)

J52

OFF

J53

ON

J54

ON

J42

OFF (3.0V)

J43

OFF (2.6V)

J44

ON (2.05V)

 

J40

OFF

J41

OFF

Make sure that U14 is set for 3.5V and U27 is set for 2.8V for the Intel MMX Processor.

Be aware that these settings should only be used with PCB Rev 4 or greater. 

Earlier versions of the PCB will not support MMX.

J1-2, 8-9, 10-12: Memory Voltage Settings (Bold=DEFAULT)

VOLTS

J1

J2

J11

J12

J8

J9

J10

5V

ON

ON

ON

ON

OFF

OFF

OFF

3.3

OFF

OFF

OFF

OFF

ON

ON

ON

We don't know what voltage your memory is.  Contact your memory vendor for proper voltage selection. Damage to your system and memory will result if voltage is set improperly!

J27: Reset Connector

Pin

Assignment

1

Power Good

2

Ground

J41: Speaker Connector

Pin

Assignment

1

Speaker Out

2

NC

3

Ground

4

+5 Volts

J23: Speaker Connector

Pin

Assignment

1

Speaker Out

2

NC

3

Ground

4

+5 Volts

J10, 11:  I/O Port Settings

BOLD = Default

J10

J11

Serial Port Enable

1-2

1-2

LR Port Enable

2-3

2-3

PS2 Connector Pinouts

This illustration corrects two reversed pins in the manual.  The two pins which have changed are 3 and 4 for GND and VCC.

You should purchase this connector from your dealer.  Making your own cable is not advisable and may damage your system and/or peripherals.

J25: Turbo LED Connector

Pin

Assignment

1

Cathode -

2

Anode +

Con 7, 9: Infrared interface

Pin

Assignment

1

Signal In

2

Ground

3

Signal Out

4

VCC

J24: HDD LED Connector

Pin

Assignment

1

Cathode - IDE1

2

Anode + - IDE1

3

Cathode - IDE1

4

Cathode - IDE2

J42: Turbo Switch

Pin 1-2

Assignment

Open

Turbo On

Closed

Turbo Off

J43: Cmos Reset

Pin 1-2

Assignment

Open

Default

Closed

Clear

J22: Keylock and Power LED connector

Pin

Assignment

1

LED Output

2

No Connection

3

Ground

4

Keylock

5

Ground

Connect your Power LED from your case across pins 1 and 3.  Keylock should be connected across pins 4 and 5.

© Copyright 2001, Tyan Computer Corporation. All Rights Reserved.