YUKON SYSTEM BOARD Motherboard Settings and Configuration

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.