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YUKON SYSTEM BOARD

SEANIX TECHNOLOGY, INC.

YUKON SYSTEM BOARD

Processor

Pentium

Processor Speed

75/90/100/120/133MHz

Chip Set

SIS

Maximum Onboard Memory

128MB

Cache

256/512/1024KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

32-bit PCI slots (4), floppy drive interface, IDE interfaces (2), parallel port, serial port, serial port/IRDA, VGA feature connector, VRM connector, cache slot, IR connector, VGA - TV - PS/2 out connector, audio - MIDI connector, CD-ROM audio cable connector, wavetable connector

NPU Options

None

CONNECTIONS

Function

Label

Function

Label

Serial port 2/IRDA

CN1

IDE interface LED

HD1

Serial port 1

CN2

Power LED & keylock

J1

VGA - TV - PS/2 out connector

CN3

CD-ROM audio connector

J2

Parallel port

CN4

Reset switch

J3

Floppy drive interface

CN5

Turbo LED

JP20

IDE interface 1

CN6

Turbo switch

JP21

IDE interface 2

CN7

Speaker

JP22

VGA feature connector

CN8

IR connector

JP36

VRM connector

CN9

32-bit PCI slots

PC1 - PC4

Audio/MIDI cable connector

CN10

Cache slot

SL1

Wavetable upgrade connector

CN11

   

USER CONFIGURABLE SETTINGS

Setting

Label

Position

»

L1 cache always invalidated

JP5

Pins 1 & 2 closed

 

L1 cache invalidated on write only

JP5

Pins 2 & 3 closed

»

Serial port 2 used for IRDA

JP10

Pins 1 & 2 closed

 

Serial port 2 used for COM2

JP10

Pins 2 & 3 closed

»

Pipeline mode enabled

JP14

Pins 2 & 3 closed

 

Pipeline mode disabled

JP14

Pins 1 & 2 closed

»

Cache type select asynchronous

JP15

Pins 1 & 2 closed

 

Cache type select synchronous

JP15

Pins 2 & 3 closed

»

PCI bus clock speed select 33MHz

JP18

Open

 

PCI bus clock speed select CPUCLK/2

JP18

Closed

»

VGA shared memory enabled

JP24

Closed

 

VGA shared memory disabled

JP24

Open

»

Parallel port IRQ select IRQ7

JP37

Pins 1 & 2 closed

 

Parallel port IRQ select IRQ5

JP37

Pins 2 & 3 closed

Note: The location of jumpers JP24 & JP37 are unidentified.

DRAM

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) 256K x 36

(2) 512K x 36

8MB

(2) 1M x 36

None

8MB

(2) 512K x 36

(2) 512K x 36

10MB

(2) 256K x 36

(2) 1M 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

DRAM (CON’T)

Size

Bank 0

Bank 1

18MB

(2) 256K x 36

(2) 2M x 36

20MB

(2) 512K x 36

(2) 2M 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

34MB

(2) 256K x 36

(2) 4M x 36

36MB

(2) 512K x 36

(2) 4M x 36

40MB

(2) 1M x 36

(2) 4M 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) 256K x 36

(2) 8M x 36

68MB

(2) 512K x 36

(2) 8M x 36

72MB

(2) 1M x 36

(2) 8M x 36

80MB

(2) 2M x 36

(2) 8M x 36

96MB

(2) 4M x 36

(2) 8M x 36

128MB

(2) 8M x 36

(2) 8M x 36

Note: Board accepts EDO memory.

CACHE SIZE

Size

SL1

256KB

Installed

512KB

Installed

1MB

Installed

Note: Only one cache module can be installed at any one time.

CPU SPEED

Setting

JP17

JP19

75MHz

Closed

Closed

90MHz

Open

Closed

100MHz

Closed

Open

120MHz

Open

Closed

133MHz

Closed

Open

CPU MULTIPLIER

Setting

JP6

JP7

1.5x

Pins 1 & 2 closed

Pins 1 & 2 closed

2x

Pins 2 & 3 closed

Pins 1 & 2 closed

2.5x

Pins 1 & 2 closed

Pins 2 & 3 closed

3x

Pins 2 & 3 closed

Pins 2 & 3 closed

Note: The location of the above jumpers are unidentified.

MISCELLANEOUS TECHNICAL NOTE

The location of pin 1 on all jumpers is unidentified.