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PS/1 TYPE 2133A, 2155A, 2168A (TYPE 1)
IBM CORPORATION
PS/1 TYPE 2133A, 2155A, 2168A (TYPE 1)
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Device Type
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Mainboard
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Processor
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80486SX/80487SX/80486DX/80486DX2/P24T
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Processor Speed
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25/33/50(internal)/66(internal)MHz
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Chip Set
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Unidentified
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Video Chip Set
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Unidentified
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Maximum Onboard Memory
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64MB
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Maximum Video Memory
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Unidentified
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Cache
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128/256KB
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BIOS
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Unidentified
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Dimensions
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330mm x 218mm
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I/O Options
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Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot
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NPU Options
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None
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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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PS/2 mouse port
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J2
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VGA feature connector
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J14
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Serial port 1
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J3
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IDE interface LED
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J26
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Serial port 2
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J4
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Speaker
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J27
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Parallel port
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J5
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Power supply connector
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J29
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VGA port
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J6
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Power supply connector
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J30
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Floppy drive interface
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J7
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Riser slot
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SL1
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IDE interface
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J9
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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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On board video disabled
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J15
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Pins 1 & 2 closed
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On board video enabled
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J15
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Pins 2 & 3 closed
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»
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Factory configured - do not alter (password bypass)
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SP103
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Unidentified
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»
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Factory configured - do not alter
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U53
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Unidentified
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SIMM 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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(1) 256K x 36
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None
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None
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None
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2MB
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(1) 256K x 36
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(1) 256K x 36
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None
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None
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3MB
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(1) 256K x 36
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(1) 256K x 36
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(1) 256K x 36
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None
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4MB
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(1) 1M x 36
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None
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None
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None
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4MB
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(1) 256K x 36
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(1) 256K x 36
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(1) 256K x 36
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(1) 256K x 36
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5MB
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(1) 1M x 36
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(1) 256K x 36
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None
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None
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6MB
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(1) 1M x 36
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(1) 256K x 36
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(1) 256K x 36
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None
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7MB
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(1) 1M x 36
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(1) 256K x 36
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(1) 256K x 36
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(1) 256K x 36
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8MB
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(1) 1M x 36
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(1) 1M x 36
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None
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None
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12MB
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(1) 1M x 36
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(1) 1M x 36
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(1) 1M x 36
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None
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16MB
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(1) 4M x 36
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None
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None
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None
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16MB
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(1) 1M x 36
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(1) 1M x 36
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(1) 1M x 36
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(1) 1M x 36
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17MB
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(1) 4M x 36
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(1) 256K x 36
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None
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None
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19MB
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(1) 4M x 36
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(1) 256K x 36
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(1) 256K x 36
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(1) 256K x 36
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20MB
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(1) 4M x 36
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(1) 1M x 36
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None
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None
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24MB
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(1) 4M x 36
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(1) 1M x 36
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(1) 1M x 36
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None
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24MB
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(1) 4M x 36
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(1) 2M x 36
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None
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None
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28MB
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(1) 4M x 36
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(1) 1M x 36
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(1) 1M x 36
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(1) 1M x 36
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32MB
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(1) 4M x 36
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(1) 4M x 36
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None
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None
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33MB
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(1) 256K x 36
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(1) 4M x 36
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(1) 4M x 36
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None
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48MB
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(1) 4M x 36
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(1) 4M x 36
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(1) 4M x 36
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None
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52MB
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(1) 4M x 36
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(1) 4M x 36
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(1) 4M x 36
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(1) 1M x 36
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64MB
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(1) 4M x 36
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(1) 4M x 36
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(1) 4M x 36
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(1) 4M x 36
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CACHE CONFIGURATION
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Size
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Bank 0
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Bank 1
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TAG
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128KB
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(4) 32K x 8
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None
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(1) 32K x 8
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256KB
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(4) 32K x 8
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(4) 32K x 8
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(1) 32K x 8
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CACHE JUMPER CONFIGURATION
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Size
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J16
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J17
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128KB
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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256KB
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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VIDEO MEMORY CONFIGURATION
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Note: The size and location of the video memory is unidentified.
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CPU TYPE SELECTION (SX SYSTEM BOARDS)
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Type
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J23
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J24
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J25
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80486SX
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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486SX/80487SX
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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486SX/ODP486
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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486SX/Pentium ODP
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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CPU TYPE SELECTION (DX, DX2 SYSTEM BOARDS)
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Type
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J23
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J24
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J25
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80486DX
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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80486DX2
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pentium ODP
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 2 & 3 closed
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