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AC 486 MODEL PQFP
UNIDENTIFIED
AC 486 MODEL PQFP
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Processor
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80486SX/80487SX/80486DX/80486DX2
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Processor Speed
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16/20/25/33/50(internal)/66(internal)MHz
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Chip Set
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ACC
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Max. Onboard DRAM
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32MB
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Cache
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None
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BIOS
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AMI
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Dimensions
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254mm x 236mm
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I/O Options
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None
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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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External battery
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J1
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Reset switch
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J4
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Turbo LED
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J2
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Speaker
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J5
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Turbo switch
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J3
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Power LED & keylock
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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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Monitor type select monochrome
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JP2
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pins 1 & 2 closed
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Monitor type select color
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JP2
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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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16MB
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(4) 4M x 9
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NONE
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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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32MB
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(4) 4M x 9
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(4) 4M x 9
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CPU TYPE CONFIGURATION
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Type
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JP3
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JP4
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JP5
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80486SX
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Open
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pins 2 & 3 closed
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pins 2 & 3 closed
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80487SX
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Closed
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pins 1 & 2, 3 & 4 closed
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pins 3 & 4 closed
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80486DX
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Closed
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pins 1 & 2, 3 & 4 closed
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pins 1 & 2 closed
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80486DX2
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Closed
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pins 1 & 2, 3 & 4 closed
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pins 1 & 2 closed
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CPU SPEED CONFIGURATION
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Speed
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JP6
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JP7
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JP8
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16MHz
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Closed
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Closed
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Closed
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20MHz
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Open
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Closed
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Closed
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25MHz
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Closed
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Open
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Closed
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33MHz
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Closed
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Closed
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Open
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50iMHz
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Closed
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Open
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Closed
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66iMHz
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Closed
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Closed
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Open
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