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80386 MOTHERBOARD (VER. 3.2)
UNIDENTIFIED
80386 MOTHERBOARD (VER. 3.2)
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Processor
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80386DX
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Processor Speed
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16/20/25/30MHz
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Chip Set
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C & T
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Video Chip Set
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None
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Maximum Onboard Memory
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16MB (8MB on external memory card)
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Maximum Video Memory
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None
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Cache
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Unidentified
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BIOS
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AMI/Award/Phoenix
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Dimensions
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327mm x 218mm
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I/O Options
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External memory card, cache connector
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NPU Options
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80287/80387DX
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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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JP3
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Turbo LED
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JP7
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Turbo switch
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JP4
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Cache memory connector
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JP11
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Power LED & keylock
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JP5
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Reset switch
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JP12
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Speaker
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JP6
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External memory card
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SL1
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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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8042 controller uses 23 pin control
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JP1
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Pins 1 & 2 closed
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Circuit speed select by pressing CTRL, ALT + or -
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JP1
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Pins 2 & 3 closed
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Monitor type select color/EGA/VGA
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JP2
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Pins 1 & 2 closed
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Monitor type select monochrome
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JP2
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Pins 2 & 3 closed
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Battery type select external
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JP3
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Closed
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On board battery enabled
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JP3
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Pins 1 & 2 closed
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On board battery disabled
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JP3
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Open
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CMOS memory clear
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JP3
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Pins 3 & 4 closed
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»
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Factory configured - do not alter
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JP8
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Closed
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CACHE CONFIGURATION
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Note: The size of the cache module is unidentified.
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NPU SELECTION
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Type
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JP9
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JP10
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None installed
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Pins 1 & 2 closed
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Open
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80287
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Pins 1 & 2 closed
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Open
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80387
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Pins 2 & 3 closed
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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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1MB
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1MB
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None
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None
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2MB
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None
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None
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1MB
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1MB
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8MB
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None
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None
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4MB
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4MB
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8MB
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4MB
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4MB
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None
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None
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16MB
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4MB
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4MB
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4MB
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4MB
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Note: The location of the banks are unidentified. The size of the chips are unidentified on the main board and memory card. Banks 1 & 2 are located on the main board. Banks 2 & 3 are located on the external memory card.
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DRAM JUMPER CONFIGURATION
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Setting
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J1
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J2
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No memory installed in main board
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Pins 1 & 2, 4 & 5 closed
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Pins 1 & 2, 4 & 5 closed
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Memory installed on main board
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Pins 2 & 3, 5 & 6 closed
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Pins 2 & 3, 5 & 6 closed
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Note: Either 2MB or 8MB will be installed on the memory card.
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