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SYSTEM MICRO 386
MINI MICRO SUPPLY COMPANY
SYSTEM MICRO 386
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Processor
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80386DX
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Processor Speed
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16/20MHz
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Chip Set
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C & T
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Max. Onboard DRAM
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2MB
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Cache
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None
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BIOS
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Phoenix
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Dimensions
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355mm x 304mm
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I/O Options
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32-bit external memory card, parallel ports (2), serial ports (2), video 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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VGA connector
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J1
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Parallel port (LPT2)
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J9
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Power LED & keylock
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J2
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Serial port (COM1)
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J10
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Speaker
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J3
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Serial port (COM2)
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J11
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Parallel port (LPT1)
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J6
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Light pen connector
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J12
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Reset switch
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J7
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32-bit external memory card
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S1
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External battery
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J8
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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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Onboard EGA enabled
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SW2/switch 1
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On
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Onboard EGA disabled
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SW2/switch 1
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Off
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Monitor type select color
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SW2/switch 4
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On
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Monitor type select monochrome
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SW2/switch 4
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Off
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NPU select 80287 or none
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SW2/switch 5
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On
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NPU select 80387
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SW2/switch 5
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Off
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Factory configured - do not alter
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SW1/switch 6
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Off
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Gate SRED On video connector
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W1
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pins 1 & 2 closed
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Gate ground On video connector pin
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W1
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pins 2 & 3 closed
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BIOS type select 27128
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W2
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pins 1 & 2 closed
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BIOS type select 27256
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W2
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pins 2 & 3 closed
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DRAM CONFIGURATION
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Onboard DRAM
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Bank 0
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Bank 1
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Exernal memory
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SW2/2
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SW2/3
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1MB
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(36) 41256
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NONE
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NONE
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On
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On
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2MB
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(36) 41256
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(4) 256K x 9
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NONE
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On
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On
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2MB
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(36) 41256
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(4) 256K x 9
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2MB
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Off
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On
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2MB
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(36) 41256
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(4) 256K x 9
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8MB
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On
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Off
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1MB
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(36) 41256
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NONE
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16MB
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Off
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Off
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Note: When external memory is installed, system memory is disabled.
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SERIAL PORT CONFIGURATION
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COM1 (J10)
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COM2 (J11)
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Interrupt
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SW1/1
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SW1/2
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SW1/5
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SW1/6
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SW1/7
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SW1/8
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enabled
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enabled
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N/A
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On
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On
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On
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On
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On
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On
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enabled
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disabled
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IRQ4
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On
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Off
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Off
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Off
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Off
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On
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enabled
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disabled
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IRQ3
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On
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Off
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Off
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Off
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On
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Off
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disabled
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enabled
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IRQ4
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Off
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On
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On
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Off
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Off
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Off
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disabled
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enabled
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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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Off
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Off
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disabled
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disabled
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N/A
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Off
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Off
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Off
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Off
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Off
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Off
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PARALLEL PORT CONFIGURATION
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LPT2
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LPT3
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SW1/Switch 3
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SW1/Switch 4
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Enabled
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Enabled
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On
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On
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Enabled
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Disabled
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Off
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On
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Disabled
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Enabled
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On
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Off
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Disabled
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Disabled
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Off
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Off
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Note:If there is no monochrome adapter then LPT2 will be recognized as LPT1 and LPT3 as LPT2.
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DISPLAY TYPE CONFIGURATION
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Display Type
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Primary Adapter
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Mode
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SW3/1
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SW3/2
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SW3/3
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SW3/4
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Color/monochrome adapter
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EGA
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80 x 25
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Off
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Off
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Off
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On
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Color/monochrome adapter
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EGA
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40 x 25
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On
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Off
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Off
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On
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EGA/monochrome adapter
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EGA
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CGA
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On
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On
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On
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Off
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EGA/monochrome adapter
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EGA
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EGA
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Off
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On
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On
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Off
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Multi-sync/mono adapter
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EGA
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EGA
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On
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On
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Off
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Off
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Color/monochrome adapter
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Monochrome
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80 x 25
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Off
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Off
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On
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On
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Color/monochrome adapter
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Monochrome
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40 x 25
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On
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Off
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Off
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On
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Color/monochrome adapter
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Monochrome
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CGA
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On
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On
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On
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Off
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EGA/monochrome adapter
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Monochrome
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EGA
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Off
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On
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On
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Off
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Multi-sync/mono adapter
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Monochrome
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EGA
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On
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On
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Off
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Off
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EGA/Color adapter
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EGA
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80 x 25
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Off
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Off
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On
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On
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EGA/Color adapter
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EGA
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40 x 25
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Off
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On
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Off
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On
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EGA/Color adapter
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Color
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80 x 25
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Off
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Off
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Off
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On
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EGA/Color adapter
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Color
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40 x 25
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On
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On
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On
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Off
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