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YUKON SYSTEM BOARD
SEANIX TECHNOLOGY, INC.
YUKON SYSTEM BOARD
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Processor
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Pentium
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Processor Speed
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75/90/100/120/133MHz
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Chip Set
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SIS
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Maximum Onboard Memory
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128MB
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Cache
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256/512/1024KB
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BIOS
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Award
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Dimensions
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330mm x 218mm
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I/O Options
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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
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NPU Options
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None
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CONNECTIONS
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Function
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Label
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Function
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Label
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Serial port 2/IRDA
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CN1
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IDE interface LED
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HD1
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Serial port 1
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CN2
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Power LED & keylock
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J1
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VGA - TV - PS/2 out connector
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CN3
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CD-ROM audio connector
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J2
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Parallel port
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CN4
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Reset switch
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J3
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Floppy drive interface
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CN5
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Turbo LED
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JP20
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IDE interface 1
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CN6
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Turbo switch
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JP21
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IDE interface 2
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CN7
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Speaker
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JP22
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VGA feature connector
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CN8
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IR connector
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JP36
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VRM connector
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CN9
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32-bit PCI slots
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PC1 - PC4
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Audio/MIDI cable connector
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CN10
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Cache slot
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SL1
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Wavetable upgrade connector
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CN11
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USER CONFIGURABLE SETTINGS
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Setting
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Label
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Position
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»
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L1 cache always invalidated
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JP5
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Pins 1 & 2 closed
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L1 cache invalidated on write only
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JP5
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Pins 2 & 3 closed
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»
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Serial port 2 used for IRDA
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JP10
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Pins 1 & 2 closed
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Serial port 2 used for COM2
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JP10
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Pins 2 & 3 closed
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»
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Pipeline mode enabled
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JP14
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Pins 2 & 3 closed
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Pipeline mode disabled
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JP14
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Pins 1 & 2 closed
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»
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Cache type select asynchronous
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JP15
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Pins 1 & 2 closed
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Cache type select synchronous
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JP15
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Pins 2 & 3 closed
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»
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PCI bus clock speed select 33MHz
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JP18
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Open
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PCI bus clock speed select CPUCLK/2
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JP18
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Closed
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»
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VGA shared memory enabled
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JP24
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Closed
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VGA shared memory disabled
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JP24
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Open
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»
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Parallel port IRQ select IRQ7
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JP37
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Pins 1 & 2 closed
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Parallel port IRQ select IRQ5
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JP37
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Pins 2 & 3 closed
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Note: The location of jumpers JP24 & JP37 are unidentified.
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DRAM
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Size
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Bank 0
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Bank 1
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2MB
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(2) 256K x 36
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None
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4MB
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(2) 512K x 36
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None
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4MB
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(2) 256K x 36
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(2) 256K x 36
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6MB
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(2) 256K x 36
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(2) 512K x 36
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8MB
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(2) 1M x 36
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None
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8MB
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(2) 512K x 36
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(2) 512K x 36
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10MB
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(2) 256K x 36
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(2) 1M x 36
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12MB
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(2) 512K x 36
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(2) 1M x 36
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16MB
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(2) 2M x 36
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None
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16MB
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(2) 1M x 36
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(2) 1M x 36
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DRAM (CON’T)
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Size
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Bank 0
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Bank 1
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18MB
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(2) 256K x 36
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(2) 2M x 36
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20MB
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(2) 512K x 36
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(2) 2M x 36
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24MB
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(2) 1M x 36
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(2) 2M x 36
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32MB
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(2) 4M x 36
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None
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32MB
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(2) 2M x 36
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(2) 2M x 36
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34MB
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(2) 256K x 36
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(2) 4M x 36
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36MB
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(2) 512K x 36
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(2) 4M x 36
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40MB
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(2) 1M x 36
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(2) 4M x 36
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48MB
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(2) 2M x 36
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(2) 4M x 36
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64MB
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(2) 8M x 36
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None
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64MB
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(2) 4M x 36
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(2) 4M x 36
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66MB
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(2) 256K x 36
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(2) 8M x 36
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68MB
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(2) 512K x 36
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(2) 8M x 36
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72MB
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(2) 1M x 36
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(2) 8M x 36
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80MB
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(2) 2M x 36
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(2) 8M x 36
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96MB
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(2) 4M x 36
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(2) 8M x 36
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128MB
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(2) 8M x 36
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(2) 8M x 36
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Note: Board accepts EDO memory.
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CACHE SIZE
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Size
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SL1
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256KB
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Installed
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512KB
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Installed
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1MB
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Installed
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Note: Only one cache module can be installed at any one time.
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CPU SPEED
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Setting
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JP17
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JP19
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75MHz
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Closed
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Closed
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90MHz
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Open
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Closed
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100MHz
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Closed
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Open
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120MHz
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Open
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Closed
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133MHz
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Closed
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Open
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CPU MULTIPLIER
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Setting
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JP6
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JP7
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1.5x
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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2x
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Pins 2 & 3 closed
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Pins 1 & 2 closed
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2.5x
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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3x
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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Note: The location of the above jumpers are unidentified.
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MISCELLANEOUS TECHNICAL NOTE
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The location of pin 1 on all jumpers is unidentified.
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