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TURBO 640
UNIDENTIFIED
TURBO 640
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Processor
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8088
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Processor Speed
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8MHz
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Chip Set
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None
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Max. onboard DRAM
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640KB
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Cache
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None
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BIOS
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Unknown
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Dimensions
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330mm x 218mm
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I/O Options
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None
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NPU Options
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8087
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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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Turbo switch
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JP5
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Power/Turbo LED
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JP9
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Keylock
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JP8
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Speaker
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P4
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Note:The exact locations of JP5 and JP8 are unknown.
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USER CONFIGURABLE SETTINGS
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Function
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Jumper/Switch
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Position
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| »
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Factory configured - do not alter
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JP1
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Unknown
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| »
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Factory configured - do not alter
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SW1/switch 1
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Off
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| »
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NPU enabled
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SW1/switch 2
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Off
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NPU disabled
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SW1/switch 2
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On
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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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Bank 2
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Bank 3
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JP3
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JP4
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256KB
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(8) 4164
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(8) 4164
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(8) 4164
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(8) 4164
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A & B closed
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B closed
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256KB
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(8) 41256
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NONE
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NONE
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NONE
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C & D closed
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A closed
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512KB
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(8) 41256
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(8) 41256
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NONE
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NONE
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C & D closed
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A closed
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640KB
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(8) 41256
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(8) 41256
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(8) 4164KB
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(8) 4164KB
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C & D closed
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A closed
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TURBO CONFIGURATION
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Mode
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JP6
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JP7
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Software switch
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Open
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Closed
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Hardware switch
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Closed
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Open
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DISPLAY CONFIGURATION
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Display Adapter
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SW1/5
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SW1/6
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SW1/7
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SW1/8
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None
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On
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On
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N/A
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N/A
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Color/Graphics (40x20)
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Off
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On
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On
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On
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Color/Graphics (80x25)
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On
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Off
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On
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On
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Monochrome or Both
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Off
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Off
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On
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On
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FLOPPY DRIVE CONFIGURATION
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Drives Installed
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SW1/7
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SW1/8
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1
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On
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On
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2
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Off
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On
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3
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On
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Off
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4
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Off
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Off
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