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AT-TURBO 286 1800
PC CALC, INC.
AT-TURBO 286 1800
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Processor
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80286
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Processor Speed
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15MHz
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Chip Set
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None
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Max. Onboard DRAM
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1MB
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Cache
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None
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BIOS
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Phoenix
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Dimensions
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355mm x 304mm
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I/O Options
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None
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NPU Options
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80287
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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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Speaker
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J19
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Turbo switch
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J25
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Power LED & keylock
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J20
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Turbo LED
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J27
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Reset switch
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J24
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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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DRAM select 1 wait state
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E1
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Open
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DRAM select 0 wait states
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E1
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Closed
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| »
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NPU speed select high
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J29
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pins 1 & 2 closed
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NPU speed select low
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J29
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pins 2 & 3 closed
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| »
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Monitor type select color
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SW1
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Closed
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Monitor type select monochrome
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SW1
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Open
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| »
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BIOS type select 27128
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U57
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pins 1 & 8, 2 & 7 closed
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BIOS type select 27256
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U57
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pins 3 & 6, 4 & 5 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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512KB
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(18) 41256
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NONE
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640KB
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(18) 41256
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(18) 4164
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1MB
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(18) 41256
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(18) 41256
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DRAM JUMPER CONFIGURATION
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Size
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J17
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J18
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512KB
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pins 2 & 3 closed
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pins 2 & 3 closed
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640KB
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pins 2 & 3 closed
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pins 1 & 2 closed
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1MB (640KB base/384KB extended)
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pins 1 & 2 closed
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pins 1 & 2 closed
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1MB (512KB base/512KB extended)
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pins 1 & 2 closed
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pins 2 & 3 closed
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EXTERNAL BATTERY CONFIGURATION
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Size
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J22
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J31
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Lithium
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Closed
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Open
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Rechargeable
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Closed
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Closed
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