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LITTLE BOARD/386SX
AMPRO COMPUTERS, INC.
LITTLE BOARD/386SX
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Processor
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80386SX
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Processor Speed
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25MHz
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Chip Set
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Ampro
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Max. onboard DRAM
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16MB
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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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330mm x 218mm
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I/O Options
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Floppy drive interface, IDE interface, parallel port, SCSI connector, serial ports (2)
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NPU Options
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80387SX
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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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Power connector
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J1
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SCSI interface
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J7
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Serial port (COM2)
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J2
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Floppy drive interface
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J8
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Serial port (COM1)
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J3
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IDE interface
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J11
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Keyboard
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J5
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Power J1-1 to +12V BUS
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W7
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Parallel port
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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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SCSI controller enabled
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W1
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Closed
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SCSI controller disabled
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W1
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Open
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SCSI controller select IRQ3
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W2 & W3
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Closed
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SCSI controller select none
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W2 & W3
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Open
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Factory configured - do not alter
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W4
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Open
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Factory configured - do not alter
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W5
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Open
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SCSI termination power enabled
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W6
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Closed
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SCSI termination power none
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W6
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Open
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Floppy clock select 16MHz
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W10
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Closed
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Floppy clock select none
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W10
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Open
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Flash EPROM programming power +12V to Byte-wide
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W16
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Open
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Flash EPROm programming power disabled
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W16
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Closed
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Watchdog timer output selection
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W17
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Open
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Watchdog timer output none
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W17
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Closed
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Factory configured - do not alter
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W18
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Open
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Floppy PCVAL selection
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W19
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Open
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Floppy PCVAL none
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W19
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Closed
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Factory configured - do not alter
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W21
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N/A
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Factory configured - do not alter
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W22
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N/A
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Power fail NMI enabled
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W23
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Open
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Power fail NMI none
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W23
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Closed
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Parallel port interrrupt option select via setup
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W24
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Open
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Parallel port interrrupt option none
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W24
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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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512KB
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(2) 256K x 9
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NONE
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1MB
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(2) 256K x 9
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(2) 256K x 9
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2MB
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(2) 1M x 9
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(2) 256K x 9
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4MB
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(2) 1M x 9
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(2) 1M x 9
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8MB
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(2) 4M x 9
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NONE
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10MB
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(2) 1M x 9
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(2) 4M x 9
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16MB
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(2) 4M x 9
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(2) 4M x 9
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EPROM CONFIGURATION (S0)
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EPROM
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W8
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W9
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W25
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27C256
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Open
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pins 7 & 8, 10 & 11
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pins 1 & 2
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27C512
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Open
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pins 1 & 4, 7 & 8, 10 & 11
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pins 1 & 2
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27C010
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Open
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pins 1 & 4, 2 & 5, 6 & 9, 7 & 8
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pins 1 & 2
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27C020
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Open
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pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12
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pins 1 & 2
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27C040
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Open
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pins 1 & 4, 2 & 3, 6 & 9, 7 & 8, 11 & 12
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pins 1 & 2
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27C080
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Closed
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pins 1 & 4, 2 & 3, 7 & 8, 11 & 12
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pins 1 & 2
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62256
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Open
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pins 4 & 7, 5 & 8, 10 & 11
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pins 1 & 2 or 2 & 3
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628128
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Open
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pins 1 & 2, 4 & 7, 5 & 8, 10 & 11
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pins 1 & 2 or 2 & 3
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uPD434000
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Open
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pins 1 & 2, 3 & 6, 4 & 7, 5 & 8, 11 & 12
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pins 1 & 2 or 2 & 3
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28F256
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Open
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pins 2 & 5, 6 & 9, 7 & 8
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pins 1 & 2
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28F512
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Open
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pins 1 & 4, 2 & 5, 6 & 9, 7 & 8
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pins 1 & 2
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28F010
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Open
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pins 1 & 4, 2 & 5, 6 & 9, 7 & 8
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pins 1 & 2
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28F020
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Open
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pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12
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pins 1 & 2
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Note:Pins designated should be in the closed position.
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EPROM/FLASH EPROM CONFIGURATION (S1 & S2)
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EPROM
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W12
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W13
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W14
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W15
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128KB
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pins 2 & 3 closed
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pins 2 & 3 closed
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pins 2 & 3 closed
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pins 2 & 3 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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pins 2 & 3 closed
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pins 2 & 3 closed
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