Tempest  (S1462)  Jumper Settings

J19: Speaker Connector

Pin #

Connection

1

Data

2

NC

3

GRND

J7: Second Level Cache

Pin #

Connection

1-2

512K Cache

2-3

256K Cache

J6: Always shorted on pins 1-2

J8: Sync or Async Cache (BOLD=Default)

Pin #

Connection

1-2

Sync SRAM

2-3

Standard SRAM

J16: Turbo Switch

Pin #

Connection

Open

High Speed

Closed

Low Speed

J17: Turbo LED Connector

Pin #

Connection

1

LED Cathode -

2

LED Anode +

J21/22: 5V Power Connector

Pin #

Connection

1

Power Good Signal

2

VCC +5V

3

+12V

4

-12V

5

GND

6

GND

7

GND

8

GND

9

-5V

10

VCC +5V

11

VCC +5V

12

VCC +5v

J24/25: 3V Power Connector

Pin #

Connection

1

GND

2

GND

3

GND

4

3.3V

5

3.3V

6

3.3V

7

3.3V

8

3.3V

9

3.3V

10

GND

11

GND

12

GND

Disable J29 for 3.3V power supply

J2,9,10,43: CPU Speed Setting

J2

J9

J10

J43

CPU Speed

BUS Speed

OFF

OFF

OFF

OFF

75MHz

50MHz - PCI=25MHz

OFF

ON

OFF

OFF

90MHz

60MHz - PCI=30MHz

ON

ON

OFF

OFF

100MHz

66MHz - PCI=33MHz

OFF

ON

ON

OFF

120MHz

60MHz - PCI=30MHz

ON

ON

ON

OFF

133MHz

66MHz - PCI=33MHz

OFF

ON

ON

ON

150MHz

60MHz - PCI=30MHz

ON

ON

ON

ON

166MHz

66MHz - PCI=33MHz

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