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425UXL/433UXL/425UCL/433UCL
CHAINTECH COMPUTER COMPANY, LTD.
425UXL/433UXL/425UCL/433UCL
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Processor
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80486SX/80487SX/80486DX/ODP486SX/80486DX2
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Processor Speed
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25/33/40/50(internal)/66(internal)MHz
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Chip Set
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USAI
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Max. Onboard DRAM
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32MB
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Cache
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64/128/256KB
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BIOS
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AMI
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Dimensions
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254mm x 220mm
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I/O Options
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32-bit VESA local bus slots (2)
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NPU Options
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None
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CONNECTIONS
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Purpose
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Location
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Purpose
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Location
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Power LED & keylock
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J2
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External battery
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J7
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Turbo switch
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J4
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Speaker
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J100
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Turbo LED
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J5
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32-bit VESA local bus slots
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SL1 & SL2
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Reset switch
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J6
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USER CONFIGURABLE SETTINGS
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Function
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Jumper
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Position
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»
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Turbo enabled
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J4
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Closed
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Turbo disabled
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J4
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Open
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»
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Factory configured - do not alter
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JMP3
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Open
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»
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Factory configured - do not alter
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JMP4
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Open
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»
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Factory configured - do not alter
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JMP5
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Open
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»
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Factory configured - do not alter
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JMP7
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Open
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»
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Factory configured - do not alter
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JMP10
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Open
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DRAM CONFIGURATION
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Size
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Bank 0
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Bank 1
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1MB
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(4) 256K x 9
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NONE
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1MB
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NONE
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(4) 256K x 9
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2MB
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(4) 256K x 9
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(4) 256K x 9
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4MB
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(4) 1M x 9
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NONE
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4MB
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NONE
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(4) 1M x 9
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8MB
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(4) 1M x 9
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(4) 1M x 9
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16MB
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(4) 4M x 9
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NONE
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16MB
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NONE
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(4) 4M x 9
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20MB
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(4) 1M x 9
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(4) 4M x 9
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20MB
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(4) 4M x 9
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(4) 1M x 9
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32MB
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(4) 4M x 9
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(4) 4M x 9
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CACHE CONFIGURATION
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Size
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Bank 0
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Bank 1
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TAG
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64KB
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(4) 8K x 8
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(4) 8K x 8
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(1) 8K x 8
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128KB
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(4) 32K x 8
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NONE
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(1) 8K x 8
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256KB
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(4) 32K x 8
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(4) 32K x 8
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(1) 32K x 8
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CACHE JUMPER CONFIGURATION
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Size
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JMP1
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JMP8
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64KB
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pins 1 & 2, 4 & 5, 7 & 8 closed
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pins 1 & 2, 4 & 5 closed
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128KB
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pins 2 & 3, 4 & 5, 8 & 9 closed
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pins 2 & 3, 4 & 5 closed
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256KB
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pins 2 & 3, 5 & 6, 8 & 9 closed
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pins 2 & 3, 5 & 6 closed
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CPU TYPE CONFIGURATION
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Type
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JMP2
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80486SX
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pins 1 & 2 closed
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ODP486SX
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pins 2 & 3 closed
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80487SX
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pins 2 & 3 closed
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80486DX
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pins 2 & 3 closed
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80486DX2
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pins 2 & 3 closed
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VESA SPEED CONFIGURATION
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Speed
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JMP6
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33MHz
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pins 1 & 4, 3 & 6 closed
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40MHz
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pins 1 & 4, 2 & 5 closed
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50MHz
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pins 1 & 4 closed
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