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80386B
AMERICAN MEGATRENDS, INC.
80386B
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Processor
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80386SX
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Processor Speed
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16/20/25MHz
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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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None
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BIOS
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AMI
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Dimensions
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330mm x 218mm
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I/O Options
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External memory cards (2)
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NPU Options
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80287 (exact location unidentified)/80387SX/3167
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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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Power LED & keylock
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J17
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Turbo LED
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J22
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Speaker
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J18
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External memory cards
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SL1 & SL2
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External battery
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J20
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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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Jumper information unavailable
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J19
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Unidentified
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80287 installed
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JP1
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Closed
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80287 not installed
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JP1
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Open
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Monitor type select color
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JP3
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Pins 1 & 2 closed
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Monitor type select monochrome
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JP3
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Pins 2 & 3 closed
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Jumper information unavailable
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JP5
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Unidentified
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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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1MB
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(4) 256K x 9
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None
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None
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None
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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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4MB
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(4) 256K x 9
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(4) 256K x 9
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(36) 41256
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(36) 41256
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4MB
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(4) 1M x 9
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None
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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 located on the external memory card.
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CPU SPEED SELECTION
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Speed
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J21
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16MHz
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Pins 1 & 2 closed
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20MHz
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Pins 2 & 3 closed
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25MHz
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Pins 2 & 3 closed
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NPU TYPE SELECTION
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Type
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JP11
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JP12
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80387 installed
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Closed
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Closed
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80387 not installed
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Open
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Open
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DRAM JUMPER CONFIGURATION
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Setting
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JP1
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JP2
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Card configured as Bank 0 & 1
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Pins 1 & 2, 4 & 5 closed
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Pins 1 & 2, 4 & 5 closed
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Card configured as Bank 2 & 3
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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: If all 4 banks are populated, memory card must be set as banks 2 & 3. Jumpers JP1 & JP2 are incorrectly labeled in the card. The correct label should read banks selection.
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