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80486VISA
FREE COMPUTER TECHNOLOGY, INC.
80486VISA
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Processor
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80486SX/80487SX/80486DX/80486DX2
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Processor Speed
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20/25/33/50(internal)/50/66(internal)MHz
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Chip Set
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SIS
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Max. Onboard DRAM
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32MB
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SRAM 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 218mm
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I/O Options
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32-bit VESA local bus (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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External battery
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JP1
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Speaker
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JP17
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Reset switch
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JP14
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Power LED & keylock
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JP18
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Turbo switch
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JP15
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32-bit VESA local bus slots (2)
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S1 & S2
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Turbo LED
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JP16
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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 monochrome
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JP2
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Closed
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Monitor type select color
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JP2
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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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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) 1M x 9
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NONE
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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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17MB
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(4) 4M x 9
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(4) 256K 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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32MB
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(4) 4M x 9
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(4) 4M x 9
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SRAM CONFIGURATION
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Size
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Cache
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Location
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TAG
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64KB
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(8) 8K x 8
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Banks 0 & 1
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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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Bank 0
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(1) 8K x 8
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256KB
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(8) 32K x 8
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Banks 0 & 1
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(1) 32K x 8
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SRAM JUMPER CONFIGURATION
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Size
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JP12
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JP13
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64KB
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Open
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Open
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128KB
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Closed
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pins 1 & 2 closed
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256KB
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Closed
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pins 2 & 3 closed
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CPU JUMPER CONFIGURATION
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CPU
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JP9
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JP10
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80486DX2
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pins 1 & 2 and 3 & 4 closed
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pins 1 & 2 closed
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80486DX
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pins 1 & 2 and 3 & 4 closed
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pins 1 & 2 closed
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ODP486SX
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pins 1 & 2 and 3 & 4 closed
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pins 2 & 3 closed
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80487SX
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pins 1 & 2 and 3 & 4 closed
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pins 2 & 3 closed
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80486SX
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pins 2 & 3 closed
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Open
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CPU SPEED JUMPER CONFIGURATION
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Speed
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JP6
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JP7
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JP11
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20MHz
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Closed
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Closed
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pins 1 & 2 closed
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25/50i MHz
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Open
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Closed
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pins 1 & 2 closed
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33/66i MHz
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Closed
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Open
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pins 1 & 2 closed
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40MHz
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Closed
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Closed
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pins 2 & 3 closed
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50MHz
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Open
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Closed
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pins 2 & 3 closed
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