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80386 MOTHERBOARD
UNIDENTIFIED
80386 MOTHERBOARD
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Processor
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80386DX
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Processor Speed
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25MHz
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Chip Set
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C & T
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Max. Onboard DRAM
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8MB
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Cache
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None
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BIOS
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AMI/Award/Phoenix
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Dimensions
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330mm x 218mm
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I/O Options
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32-bit external memory card slots (2)
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NPU Options
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80287/80387
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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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J11
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32-bit external memory card
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S1
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Turbo switch
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J12
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32-bit external memory card
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S2
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Power LED & keylock
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J13
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Reset switch
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SW1
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External battery
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JP10
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Turbo LED
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SW2
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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 color
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JP8
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pins 1 & 2 closed
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Monitor type select monochrome
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JP8
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pins 2 & 3 closed
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| »
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CMOS memory normal operation
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JP9
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Open
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CMOS memory clear
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JP9
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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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Bank 2
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Bank 3
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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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NONE
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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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NONE
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NONE
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10MB
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(4) 1M x 9
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(4) 1M x 9
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(36) 41256
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(36) 41256
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16MB
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(4) 1M x 9
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(4) 1M x 9
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(36) 411000
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(36) 411000
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Note:Banks 2 & 3 are used when a 32-bit external memory card is installed.
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NPU TYPE CONFIGURATION
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Type
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JP3
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JP6
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JP7
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80287
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Open
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Closed
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Open
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80387
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Closed
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Closed
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Closed
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Disabled
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Open
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Open
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Open
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NPU MODE CONFIGURATION
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Setting
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JP2
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JP4
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Synchronous with cpu
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pins 1 & 2 closed
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pins 2 & 3 closed
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Synchronous with oscillator osc1
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pins 2 & 3 closed
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pins 1 & 2 closed
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BIOS CONFIGURATION
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Setting
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JP1
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JP20
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AMI/Award
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pins 1 & 2 closed
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pins 1 & 2 closed
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Phoenix
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pins 2 & 3 closed
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pins 2 & 3 closed
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