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SBC8257
AXIOM TECHNOLOGY, INC.
SBC8257
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Processor
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CX M1/AM K5/Pentium
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Processor Speed
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75/90/100/120/133/150/166/200MHz
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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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128MB (EDO supported)
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Maximum Video Memory
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1MB
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Cache
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256/512KB
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BIOS
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Award
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Dimensions
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185mm x 122mm
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I/O Options
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Floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port/keyboard, serial ports (2), VGA port, flat panel connector, PC104 connectors (2)
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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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Serial port 1
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CN1
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Auxiliarty keyboard connector
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EXKB
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VGA port
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CN2
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Green PC connector
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GRN
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Serial port 2
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CN3
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IDE interface LED
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HDL
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Parallel port
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CN4
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Reset switch
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JP8
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Floppy drive interface
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CN5
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Power LED & keylock
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KBL
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IDE interface 1
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CN6
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Speaker
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SPK
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IDE interface 2
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CN7
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Turbo LED
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TBL
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Flat panel connector
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CN8
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PC104 connector
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104AB
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PS/2 mouse port/keyboard
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CN9
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PC104 connector
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104CD
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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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1MB
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(1) 256K x 36
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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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2MB
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(1) 512K x 36
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None
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3MB
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(1) 256K x 36
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(1) 512K x 36
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4MB
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(1) 512K x 36
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(1) 512K x 36
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4MB
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(1) 1M x 36
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None
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5MB
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(1) 256K x 36
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(1) 1M x 36
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6MB
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(1) 512K x 36
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(1) 1M 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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8MB
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(1) 2M x 36
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None
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10MB
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(1) 512K x 36
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(1) 2M x 36
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12MB
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(1) 1M x 36
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(1) 2M x 36
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16MB
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(1) 2M x 36
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(1) 2M x 36
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20MB
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(1) 1M x 36
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(1) 4M x 36
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24MB
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(1) 2M x 36
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(1) 4M 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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32MB
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(1) 8M x 36
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None
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36MB
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(1) 1M x 36
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(1) 8M x 36
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40MB
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(1) 2M x 36
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(1) 8M x 36
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48MB
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(1) 4M x 36
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(1) 8M x 36
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64MB
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(1) 8M x 36
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(1) 8M x 36
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96MB
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(1) 8M x 36
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(1) 16M x 36
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128MB
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(1) 16M x 36
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(1) 16M x 36
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Note: Board accepts EDO memory.
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CACHE CONFIGURATION
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Note: The location of the cache is unidentified.
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VIDEO MEMORY CONFIGURATION
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Note: 1MB video memory is factory installed and not configurable.
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CPU SPEED SELECTION (CYRIX)
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CPU speed
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Clock speed
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Multiplier
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JP2
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JP3
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JP4
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JP6
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120MHz
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50MHz
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2x
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Open
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Open
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Closed
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3 & 5, 4 & 6
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150MHz
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60MHz
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2x
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Open
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Open
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Closed
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1 & 3, 4 & 6
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166MHz
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66MHz
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2x
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Open
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Open
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Closed
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2 & 4, 3 & 5
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Note: Pins designated should be in the closed position.
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CPU SPEED SELECTION (AMD)
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Note: AMD CPU configuration is unidentified.
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CPU SPEED SELECTION (INTEL)
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CPU speed
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Clock speed
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Multiplier
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JP2
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JP3
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JP4
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JP6
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75MHz
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50MHz
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1.5x
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Open
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Open
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Open
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3 & 5, 4 & 6
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90MHz
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60MHz
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1.5x
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Open
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Open
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Open
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1 & 3, 4 & 6
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100MHz
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66MHz
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1.5x
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Open
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Open
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Open
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2 & 4, 3 & 5
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120MHz
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60MHz
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2x
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Closed
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Open
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Open
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1 & 3, 4 & 6
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133MHz
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66MHz
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2x
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Closed
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Open
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Open
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2 & 4, 3 & 5
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150MHz
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50MHz
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2.5x
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Open
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Closed
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Open
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3 & 5, 4 & 6
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166MHz
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66MHz
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2.5x
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Closed
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Closed
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Open
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2 & 4, 3 & 5
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200MHz
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66MHz
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3x
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Open
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Closed
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Open
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2 & 4, 3 & 5
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Note: Pins designated should be in the closed position.
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CPU VOLTAGE SELECTION
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Voltage
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JP5
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2.5v
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Pins 5 & 6 closed
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2.7v
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Pins 7 & 8 closed
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3.3v
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Pins 1 & 2 closed
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3.52v
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Pins 3 & 4 closed
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SERIAL PORT 2 SELECTION
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Setting
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JP7
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RS-232
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1 & 2
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RS-422
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1 & 3, 5 & 6, 7 & 8, 9 & 10, 11 & 12, 17 & 18, 19 & 20, 21 & 22, 23 & 24
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RS-485
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1 & 3, 4 & 6, 7 & 8, 9 & 10, 11 & 12, 13 & 14, 15 & 16, 17 & 18, 19 & 20, 21 & 22, 23 & 24
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Note: Pins designated should be in the closed position.
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KYEBOARD/MOUSE SELECTION
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Setting
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JP9
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JP10
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CN8 used as keyboard
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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CN8 used as PS/2 mouse
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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