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MODEL D4 PLUS
LEADING EDGE PRODUCTS, INC.
MODEL D4 PLUS
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Processor
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80486SX/80487SX/80486DX/80486DX2
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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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Max. Onboard DRAM
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32MB
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Cache
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64/128/256KB (on CPU card)
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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 CPU card, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (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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PS/2 mouse port
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CN1
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Floppy drive interface
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CN6
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Serial port 1
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CN3
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IDE interface
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CN7
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Serial port 2
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CN4
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CPU card slot
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SL1
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Parallel port
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CN5
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USER CONFIGURABLE SETTINGS
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Function
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Jumper
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Position
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»
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Monitor type select color
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JP1
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Closed
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Monitor type select monochrome
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JP1
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Open
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»
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Parallel port enabled (printer)
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JP2
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Open
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Parallel port disabled
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JP2
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Closed
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»
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CMOS memory normal operation
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JP3
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pins 1 & 2 closed
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CMOS memory clear
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JP3
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pins 2 & 3 closed
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»
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Standard local bus card installed
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JP5
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pins 1 & 2 closed
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Standard local bus card not installed
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JP5
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pins 2 & 3 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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2MB
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(4) 256K x 9
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(4) 256K x 9
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4MB
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(4) 1M x 9
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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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16MB
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(4) 1M x 9
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(4) 1M x 9
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16MB
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(4) 4M x 9
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NONE
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32MB
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(4) 4M x 9
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(4) 4M x 9
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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 (U12)
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TAG (U13)
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64KB
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(4) 8K x 8
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(4) 8K x 8
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NONE
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(1) 8K x 8
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128KB
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(4) 32K x 8
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NONE
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NONE
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(1) 8K 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) 8K x 8
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(1) 8K x 8
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CACHE JUMPER/SWITCH CONFIGURATION
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Size
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JP1
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SW1/1
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SW1/2
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SW1/3
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SW1/4
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64KB
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pins 2 & 3 closed
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Off
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Off
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Off
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Off
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128KB
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pins 1 & 2 closed
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On
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Off
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Off
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On
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256KB
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pins 2 & 3 closed
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On
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On
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Off
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On
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CPU TYPE CONFIGURATION
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Type
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JP3
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80486SX
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pins 5 & 6 closed
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80487SX
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pins 2 & 3, 4 & 5, 6 & 7 closed
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80486DX
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pins 1 & 2, 4 & 5, 6 & 7 closed
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80486DX2
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pins 1 & 2, 4 & 5, 6 & 7 closed
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