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SUPERMICRO 286
NORTHGATE COMPUTER SYSTEMS, INC.
SUPERMICRO 286
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Processor
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80286
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Processor Speed
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12/16/20MHz
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Chip Set
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VLSI
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Max. Onboard DRAM
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4MB
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SRAM Cache
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None
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BIOS
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Award
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Dimensions
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355mm x 304mm
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I/O Options
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16-bit onboard bus memory slot, parallel port, serial port (2)
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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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Reset switch
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J1
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Parallel port
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J201
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Speaker
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J2
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Serial port 2 (COM2)
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J202
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External battery
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J3
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Serial port 1 (COM1)
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J203
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Turbo LED
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J5
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16-bit onboard bus memory slot
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S1
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Power LED & keylock
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J6
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USER CONFIGURABLE SETTINGS
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Function
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Jumper/Switch
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Position
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RAM select 0 wait states
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W3
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On
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RAM select 1 wait state
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W3
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Off
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ROM select 0 wait states
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W4
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On
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ROM select 1 wait state
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W4
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Off
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Monitor type select color
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W10
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pins 2 & 3 closed
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Monitor type select monochrome
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W10
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pins 1 & 2 closed
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CPU speed select high
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W11
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Open
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CPU speed select low
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W11
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pins 2 & 3 closed
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CPU speed select keyboard control
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W11
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pins 1 & 2 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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W6
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W7
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512KB
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(18) 41256
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NONE
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Off
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On
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1MB
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(18) 41256
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(18) 41256
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Off
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Off
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2MB
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(18) 411000
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NONE
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On
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On
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4MB
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(18) 411000
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(18) 411000
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On
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Off
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MEMORY SPEED CONFIGURATION
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Speed
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W5
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60ns
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pins 1 & 2 closed
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80ns
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pins 1 & 2, 3 & 4 closed
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100ns
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pins 2 & 3 closed
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Note:Speed is factory configured and should not be altered.
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NPU SPEED CONFIGURATION
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Speed
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OSC
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W1
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W2
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7.15MHz
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7.15MHz
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pins 1 & 2 closed
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pins 3 & 4 closed
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7.15MHz
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21.45MHz
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pins 2 & 3 closed
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pins 3 & 4 closed
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10.00MHz
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10.00MHz
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pins 1 & 2 closed
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Pins 5 & 6 closed
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10.00MHz
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30.00MHz
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pins 2 & 3 closed
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Pins 5 & 6 closed
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14.32MHz
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14.32MHz
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pins 1 & 2 closed
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pins 1 & 2 closed
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14.32MHz
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42.96MHz
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pins 2 & 3 closed
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pins 1 & 2 closed
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SERIAL PORT CONFIGURATION
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Port 1 (J203)
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Port 2 (J202)
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SW201/1
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SW201/2
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SW202/1
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SW202/2
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COM1/IRQ4
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COM2/IRQ3
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Off
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Off
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On
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On
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COM1/IRQ4
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Disabled
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Off
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On
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On
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Off
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Disabled
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COM2/IRQ3
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Off
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On
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Off
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On
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Disabled
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Disabled
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On
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On
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N/A
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N/A
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PARALLEL PORT CONFIGURATION
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LPT
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IRQ
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SW201/3
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SW201/4
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SW202/3
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SW202/4
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LPT1
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IRQ5
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Off
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Off
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On
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Off
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LPT1
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IRQ7
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Off
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Off
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Off
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On
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LPT2
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IRQ5
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Off
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On
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On
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Off
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LPT2
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IRQ7
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Off
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On
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Off
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On
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Disabled
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N/A
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On
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N/A
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N/A
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N/A
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