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502 386DX
YOUTH KEEP ENTERPRISES, LTD.
502 386DX
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Processor
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80386DX
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Processor Speed
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33MHz
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Chip Set
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Unidentified
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Max. Onboard DRAM
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8MB
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Cache
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64/256KB
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BIOS
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Unidentified
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Dimensions
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355mm x 304mm
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I/O Options
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32-bit external memory card slot
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NPU Options
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80387/3167
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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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J1
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Turbo LED
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J5
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Speaker
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J2
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External battery
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J6
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Turbo switch
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J3
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32-bit external memory card
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S1
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Reset switch
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J4
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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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Monitor type select color
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JP10
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pins 1 & 2 closed
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Monitor type select monochrome
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JP10
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pins 2 & 3 closed
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NPU disabled
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JP13
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pins 2 & 3 closed
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NPU enabled
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JP13
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pins 1 & 2 closed
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NPU mode select asynchronous with CPU
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JP14
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pins 1 & 2 closed
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NPU mode select synchronous with CPU
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JP14
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pins 2 & 3 closed
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CPU speed select fast
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JP15
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pins 1 & 2 closed
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CPU speed select slow
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JP15
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pins 2 & 3 closed
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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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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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5MB
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(4) 256K x 9
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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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DRAM JUMPER CONFIGURATION
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Size
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JP1
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JP2
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JP3
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JP4
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JP5
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JP6
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JP7
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JP8
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1MB
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Closed
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Closed
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Closed
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Closed
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2 & 3
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Open
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Open
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Open
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2MB
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Closed
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Closed
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Closed
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Closed
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2 & 3
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2 & 3
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Open
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Open
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4MB
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Closed
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Closed
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Open
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Open
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1 & 2
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Open
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Open
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Open
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5MB
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Closed
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Open
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Closed
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Closed
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2 & 3
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1 & 2
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Open
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Open
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8MB
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Closed
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Open
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Open
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Closed
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1 & 2
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1 & 2
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Open
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Open
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Note:Pins designated should be in the closed position.
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CACHE CONFIGURATION
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Size
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Bank 0
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TAG
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64KB
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(8) 64K x 1
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(2) 64K x 1
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256KB
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(8) 256K x 1
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(2) 256K x 1
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