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AT-TURBO 286
IBM CORPORATION
AT-TURBO 286
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Processor
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80286
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Processor Speed
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6/8/10MHz
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Chip Set
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Unidentified
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Video Chip Set
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None
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Maximum Onboard Memory
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1MB
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Maximum Video Memory
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None
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Cache
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None
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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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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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External battery
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J21
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Power LED & keylock
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J20
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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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Label
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Position
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»
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Factory configured - do not alter (wait state select)
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J23
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Unidentified
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Monitor type select color
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SW1
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Pins 2 & 3 closed
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Monitor type select monochrome
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SW1
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Pins 1 & 2 closed
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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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Type
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Bank 0
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Bank 1
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512KB
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512KB
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(9) 41256
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None
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640KB
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640KB
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(9) 41256
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(9) 4164
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1MB
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640KB internal/384KB expansion
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(9) 41256
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(9) 41256
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1MB
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512KB internal/512KB expansion
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(9) 41256
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(9) 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 1 & 2 closed
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Pins 2 & 3 closed
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1MB
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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1MB
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Pins 2 & 3 closed
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Pins 1 & 2 closed
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CPU SPEED SELECTION
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Speed
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J25
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6MHz
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Pins 2 & 3 closed
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8MHz
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Pins 1 & 2 closed
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10MHz
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Pins 1 & 2 closed
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