diff --git a/configs/teensy/README.txt b/configs/teensy/README.txt
index 73257fd8de..88904669c9 100644
--- a/configs/teensy/README.txt
+++ b/configs/teensy/README.txt
@@ -513,19 +513,42 @@ Teensy++ Configuration Options
 Configurations
 ^^^^^^^^^^^^^^
 
-Each Teensy++ configuration is maintained in a sub-directory and can
-be selected as follow:
+Common Configuration Notes
+--------------------------
 
-    cd tools
-    ./configure.sh teensy/<subdir>
-    cd -
-    . ./setenv.sh
+  1. Each Teensy++ configuration is maintained in a sub-directory and
+     can be selected as follow:
 
-NOTE: You must also copy avr-libc header files, perhaps like:
+       cd tools
+       ./configure.sh teensy/<subdir>
+       cd -
+       . ./setenv.sh
 
-     cp -a /cygdrive/c/WinAVR/include/avr include/.
+     Where <subdir> is one of the configuration sub-directories described in
+     the following paragraph.
 
-Where <subdir> is one of the following:
+     NOTE: You must also copy avr-libc header files, perhaps like:
+
+       cp -a /cygdrive/c/WinAVR/include/avr include/.
+
+  2. These configurations use the mconf-based configuration tool.  To
+     change a configurations using that tool, you should:
+
+     a. Build and install the kconfig-mconf tool.  See nuttx/README.txt
+        and misc/tools/
+
+     b. Execute 'make menuconfig' in nuttx/ in order to start the
+        reconfiguration process.
+
+  3. By default, all configurations assume the NuttX Buildroot toolchain
+     under Cygwin with Windows.  This is easily reconfigured:
+
+        CONFIG_HOST_WINDOWS=y
+        CONFIG_WINDOWS_CYGWIN=y
+        CONFIG_AVR_BUILDROOT=y
+
+Configuration Sub-Directories
+-----------------------------
 
   hello:
     The simple apps/examples/hello "Hello, World!" example.
@@ -540,25 +563,14 @@ Where <subdir> is one of the following:
     This configuration directory exercises the USB mass storage
     class driver at apps/system/usbmsc.  See apps/examples/README.txt
     for more information.
-   NOTES:
 
-  1. This configuration uses the mconf-based configuration tool.  To
-     change this configuration using that tool, you should:
+    NOTE:  THIS CONFIGURATION HAS NOT YET BEEN DEBUGGED AND DOES NOT
+    WORK!!!  ISSUES:  (1) THE SPI DRIVER IS UNTESTED, (2) THE USB DRIVER
+    IS UNTESTED, AND (3) THE RAM USAGE MIGHT BE EXCESSIVE.
 
-     a. Build and install the kconfig-mconf tool.  See nuttx/README.txt
-        and misc/tools/
-
-     b. Execute 'make menuconfig' in nuttx/ in order to start the
-        reconfiguration process.
-
-  2. NOTE:  THIS CONFIGURATION HAS NOT YET BEEN DEBUGGED AND DOES NOT
-     WORK!!!  ISSUES:  (1) THE SPI DRIVER IS UNTESTED, (2) THE USB DRIVER
-     IS UNTESTED, AND (3) THE RAM USAGE MIGHT BE EXCESSIVE.
-
-
-     Update 7/11:  (1) The SPI/SD driver has been verified, however, (2) I
-     believe that the current teensy/usbmsc configuration uses too
-     much SRAM for the system to behave sanely.  A lower memory footprint
-     version of the mass storage driver will be required before this can
-     be debugged.
+    Update 7/11:  (1) The SPI/SD driver has been verified, however, (2) I
+    believe that the current teensy/usbmsc configuration uses too
+    much SRAM for the system to behave sanely.  A lower memory footprint
+    version of the mass storage driver will be required before this can
+    be debugged.
 
diff --git a/configs/teensy/hello/appconfig b/configs/teensy/hello/appconfig
deleted file mode 100644
index c3440d8275..0000000000
--- a/configs/teensy/hello/appconfig
+++ /dev/null
@@ -1,39 +0,0 @@
-############################################################################
-# configs/teensy/hello/appconfig
-#
-#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
-#   Author: Gregory Nutt <gnutt@nuttx.org>
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in
-#    the documentation and/or other materials provided with the
-#    distribution.
-# 3. Neither the name NuttX nor the names of its contributors may be
-#    used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
-# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
-# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
-#
-############################################################################
-
-# Path to example in apps/examples containing the user_start entry point
-
-CONFIGURED_APPS += examples/hello
-
diff --git a/configs/teensy/hello/defconfig b/configs/teensy/hello/defconfig
index c02abc004a..5711fd4005 100644
--- a/configs/teensy/hello/defconfig
+++ b/configs/teensy/hello/defconfig
@@ -1,196 +1,201 @@
-############################################################################
-# configs/teensy/hello/defconfig
 #
-#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
-#   Author: Gregory Nutt <gnutt@nuttx.org>
+# Automatically generated file; DO NOT EDIT.
+# Nuttx/ Configuration
 #
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in
-#    the documentation and/or other materials provided with the
-#    distribution.
-# 3. Neither the name NuttX nor the names of its contributors may be
-#    used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
-# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
-# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
-#
-############################################################################
-#
-# Architecture Selection
-#
-CONFIG_ARCH="avr"
-CONFIG_ARCH_AVR=y
-CONFIG_ARCH_AT90USB=y
-CONFIG_ARCH_CHIP="at90usb"
-CONFIG_ARCH_CHIP_AT90USB1286=y
-CONFIG_ARCH_BOARD="teensy"
-CONFIG_ARCH_BOARD_TEENSY=y
-CONFIG_DEFAULT_SMALL=y
-CONFIG_BOARD_LOOPSPERMSEC=864
-CONFIG_RAM_SIZE=8192
-CONFIG_RAM_START=0x800100
-CONFIG_ARCH_NOINTC=y
-CONFIG_ARCH_IRQPRIO=n
-CONFIG_ARCH_INTERRUPTSTACK=0
-CONFIG_ARCH_STACKDUMP=y
-CONFIG_ARCH_LEDS=y
-CONFIG_ARCH_BUTTONS=n
-CONFIG_ARCH_CALIBRATION=n
-CONFIG_ARCH_DMA=n
+CONFIG_NUTTX_NEWCONFIG=y
 
 #
-# Identify toolchain and linker options
+# Build Setup
 #
-CONFIG_AVR_WINAVR=n
-CONFIG_AVR_LINUXGCC=n
+# CONFIG_EXPERIMENTAL is not set
+CONFIG_DEFAULT_SMALL=y
+# CONFIG_HOST_LINUX is not set
+# CONFIG_HOST_OSX is not set
+CONFIG_HOST_WINDOWS=y
+# CONFIG_HOST_OTHER is not set
+# CONFIG_WINDOWS_NATIVE is not set
+CONFIG_WINDOWS_CYGWIN=y
+# CONFIG_WINDOWS_MSYS is not set
+# CONFIG_WINDOWS_OTHER is not set
+
+#
+# Build Configuration
+#
+# CONFIG_APPS_DIR="../apps"
+# CONFIG_BUILD_2PASS is not set
+
+#
+# Binary Output Formats
+#
+# CONFIG_RRLOAD_BINARY is not set
+CONFIG_INTELHEX_BINARY=y
+# CONFIG_MOTOROLA_SREC is not set
+# CONFIG_RAW_BINARY is not set
+
+#
+# Customize Header Files
+#
+# CONFIG_ARCH_STDBOOL_H is not set
+# CONFIG_ARCH_MATH_H is not set
+# CONFIG_ARCH_FLOAT_H is not set
+# CONFIG_ARCH_STDARG_H is not set
+
+#
+# Debug Options
+#
+# CONFIG_DEBUG is not set
+CONFIG_ARCH_HAVE_STACKCHECK=y
+# CONFIG_ARCH_HAVE_HEAPCHECK is not set
+# CONFIG_DEBUG_SYMBOLS is not set
+CONFIG_ARCH_HAVE_CUSTOMOPT=y
+# CONFIG_DEBUG_NOOPT is not set
+# CONFIG_DEBUG_CUSTOMOPT is not set
+CONFIG_DEBUG_FULLOPT=y
+
+#
+# System Type
+#
+# CONFIG_ARCH_8051 is not set
+# CONFIG_ARCH_ARM is not set
+CONFIG_ARCH_AVR=y
+# CONFIG_ARCH_HC is not set
+# CONFIG_ARCH_MIPS is not set
+# CONFIG_ARCH_RGMP is not set
+# CONFIG_ARCH_SH is not set
+# CONFIG_ARCH_SIM is not set
+# CONFIG_ARCH_X86 is not set
+# CONFIG_ARCH_Z16 is not set
+# CONFIG_ARCH_Z80 is not set
+CONFIG_ARCH="avr"
+CONFIG_ARCH_FAMILY="avr"
+CONFIG_ARCH_CHIP="at90usb"
+# CONFIG_ARCH_CHIP_ATMEGA128 is not set
+# CONFIG_ARCH_CHIP_AT90USB646 is not set
+# CONFIG_ARCH_CHIP_AT90USB647 is not set
+CONFIG_ARCH_CHIP_AT90USB1286=y
+# CONFIG_ARCH_CHIP_AT90USB1287 is not set
+# CONFIG_ARCH_CHIP_AT32UC3B0256 is not set
+CONFIG_ARCH_FAMILY_AVR=y
+CONFIG_ARCH_AT90USB=y
+
+#
+# AVR Configuration Options
+#
+# CONFIG_AVR_WINAVR is not set
 CONFIG_AVR_BUILDROOT=y
 
 #
-# Individual subsystems can be enabled:
+# AT90USB Configuration Options
 #
 
-CONFIG_AVR_INT0=n
-CONFIG_AVR_INT1=n
-CONFIG_AVR_INT2=n
-CONFIG_AVR_INT3=n
-CONFIG_AVR_INT4=n
-CONFIG_AVR_INT5=n
-CONFIG_AVR_INT6=n
-CONFIG_AVR_INT7=n
-CONFIG_AVR_USBHOST=n
-CONFIG_AVR_USBDEV=n
-CONFIG_AVR_WDT=n
-CONFIG_AVR_TIMER0=n
-CONFIG_AVR_TIMER1=n
-CONFIG_AVR_TIMER2=n
-CONFIG_AVR_TIMER3=n
-CONFIG_AVR_SPI=n
+#
+# AT90USB Peripheral Selections
+#
+# CONFIG_AVR_SPI is not set
 CONFIG_AVR_USART1=y
-CONFIG_AVR_ANACOMP=n
-CONFIG_AVR_ADC=n
-CONFIG_AVR_TWI=n
+# CONFIG_AVR_USBDEV is not set
+# CONFIG_AVR_WDT is not set
+# CONFIG_AVR_GPIOIRQ is not set
+# CONFIG_AVR_USART0 is not set
 
 #
-# AT90USB specific serial device driver settings
+# Architecture Options
 #
-CONFIG_USART1_SERIAL_CONSOLE=y
-CONFIG_USART1_TXBUFSIZE=256
-CONFIG_USART1_RXBUFSIZE=256
-CONFIG_USART1_BAUD=38400
-CONFIG_USART1_BITS=8
-CONFIG_USART1_PARITY=0
-CONFIG_USART1_2STOP=0
+CONFIG_ARCH_NOINTC=y
+# CONFIG_ARCH_VECNOTIRQ is not set
+# CONFIG_ARCH_DMA is not set
+# CONFIG_ARCH_HAVE_IRQPRIO is not set
+# CONFIG_CUSTOM_STACK is not set
+# CONFIG_ADDRENV is not set
+# CONFIG_ARCH_HAVE_VFORK is not set
+# CONFIG_ARCH_HAVE_MMU is not set
+# CONFIG_ARCH_NAND_HWECC is not set
+CONFIG_ARCH_STACKDUMP=y
+# CONFIG_ENDIAN_BIG is not set
+# CONFIG_ARCH_IDLE_CUSTOM is not set
+# CONFIG_ARCH_HAVE_RAMFUNCS is not set
+# CONFIG_ARCH_HAVE_RAMVECTORS is not set
 
 #
-# General build options
+# Board Settings
 #
-CONFIG_RRLOAD_BINARY=n
-CONFIG_INTELHEX_BINARY=y
-CONFIG_MOTOROLA_SREC=n
-CONFIG_RAW_BINARY=n
+CONFIG_BOARD_LOOPSPERMSEC=864
+# CONFIG_ARCH_CALIBRATION is not set
 
 #
-# General OS setup
+# Interrupt options
 #
-CONFIG_USER_ENTRYPOINT="hello_main"
-CONFIG_DEBUG=n
-CONFIG_DEBUG_VERBOSE=n
-CONFIG_DEBUG_SYMBOLS=n
-CONFIG_DEBUG_SCHED=n
-CONFIG_MM_REGIONS=1
-CONFIG_ARCH_LOWPUTC=y
+CONFIG_ARCH_HAVE_INTERRUPTSTACK=y
+CONFIG_ARCH_INTERRUPTSTACK=0
+# CONFIG_ARCH_HAVE_HIPRI_INTERRUPT is not set
+
+#
+# Boot options
+#
+# CONFIG_BOOT_RUNFROMEXTSRAM is not set
+CONFIG_BOOT_RUNFROMFLASH=y
+# CONFIG_BOOT_RUNFROMISRAM is not set
+# CONFIG_BOOT_RUNFROMSDRAM is not set
+# CONFIG_BOOT_COPYTORAM is not set
+
+#
+# Boot Memory Configuration
+#
+CONFIG_RAM_START=0x800100
+CONFIG_RAM_SIZE=8192
+# CONFIG_ARCH_HAVE_SDRAM is not set
+
+#
+# Board Selection
+#
+# CONFIG_ARCH_BOARD_MICROPENDOUS3 is not set
+CONFIG_ARCH_BOARD_TEENSY=y
+# CONFIG_ARCH_BOARD_CUSTOM is not set
+CONFIG_ARCH_BOARD="teensy"
+
+#
+# Common Board Options
+#
+CONFIG_ARCH_HAVE_LEDS=y
+CONFIG_ARCH_LEDS=y
+
+#
+# Board-Specific Options
+#
+
+#
+# RTOS Features
+#
+# CONFIG_BOARD_INITIALIZE is not set
+CONFIG_MSEC_PER_TICK=10
+# CONFIG_SYSTEM_TIME64 is not set
 CONFIG_RR_INTERVAL=0
-CONFIG_SCHED_INSTRUMENTATION=n
+# CONFIG_SCHED_CPULOAD is not set
+# CONFIG_SCHED_INSTRUMENTATION is not set
 CONFIG_TASK_NAME_SIZE=0
+# CONFIG_SCHED_HAVE_PARENT is not set
+# CONFIG_JULIAN_TIME is not set
 CONFIG_START_YEAR=2011
 CONFIG_START_MONTH=6
 CONFIG_START_DAY=16
-CONFIG_GREGORIAN_TIME=n
-CONFIG_JULIAN_TIME=n
 CONFIG_DEV_CONSOLE=y
-CONFIG_DEV_LOWCONSOLE=y
-CONFIG_MUTEX_TYPES=n
-CONFIG_PRIORITY_INHERITANCE=n
-CONFIG_SEM_PREALLOCHOLDERS=0
-CONFIG_SEM_NNESTPRIO=0
-CONFIG_FDCLONE_DISABLE=n
-CONFIG_FDCLONE_STDIO=n
+# CONFIG_MUTEX_TYPES is not set
+# CONFIG_PRIORITY_INHERITANCE is not set
+# CONFIG_FDCLONE_DISABLE is not set
+# CONFIG_FDCLONE_STDIO is not set
 CONFIG_SDCLONE_DISABLE=y
-CONFIG_SCHED_WORKQUEUE=n
-CONFIG_SCHED_WORKPRIORITY=192
-CONFIG_SCHED_WORKPERIOD=50000
-CONFIG_SCHED_WORKSTACKSIZE=1024
-CONFIG_SIG_SIGWORK=17
-
-#
-# Settings for nxflat
-#
-CONFIG_NXFLAT=n
-CONFIG_NXFLAT_DUMPBUFFER=n
-CONFIG_SYMTAB_ORDEREDBYNAME=y
-
-#
-# The following can be used to disable categories of
-# APIs supported by the OS.  If the compiler supports
-# weak functions, then it should not be necessary to
-# disable functions unless you want to restrict usage
-# of those APIs.
-#
-# There are certain dependency relationships in these
-# features.
-#
-# o mq_notify logic depends on signals to awaken tasks
-#   waiting for queues to become full or empty.
-# o pthread_condtimedwait() depends on signals to wake
-#   up waiting tasks.
-#
-CONFIG_DISABLE_CLOCK=n
+# CONFIG_SCHED_WAITPID is not set
+# CONFIG_SCHED_STARTHOOK is not set
+# CONFIG_SCHED_ATEXIT is not set
+# CONFIG_SCHED_ONEXIT is not set
+CONFIG_USER_ENTRYPOINT="hello_main"
+CONFIG_DISABLE_OS_API=y
+# CONFIG_DISABLE_CLOCK is not set
 CONFIG_DISABLE_POSIX_TIMERS=y
 CONFIG_DISABLE_PTHREAD=y
 CONFIG_DISABLE_SIGNALS=y
 CONFIG_DISABLE_MQUEUE=y
-CONFIG_DISABLE_MOUNTPOINT=y
 CONFIG_DISABLE_ENVIRON=y
-CONFIG_DISABLE_POLL=y
-
-#
-# Misc libc settings
-#
-CONFIG_NOPRINTF_FIELDWIDTH=n
-
-#
-# Allow for architecture optimized implementations
-#
-# The architecture can provide optimized versions of the
-# following to improve system performance
-#
-CONFIG_ARCH_MEMCPY=n
-CONFIG_ARCH_MEMCMP=n
-CONFIG_ARCH_MEMMOVE=n
-CONFIG_ARCH_MEMSET=n
-CONFIG_ARCH_STRCMP=n
-CONFIG_ARCH_STRCPY=n
-CONFIG_ARCH_STRNCPY=n
-CONFIG_ARCH_STRLEN=n
-CONFIG_ARCH_STRNLEN=n
-CONFIG_ARCH_BZERO=n
 
 #
 # Sizes of configurable things (0 disables)
@@ -201,216 +206,388 @@ CONFIG_NPTHREAD_KEYS=0
 CONFIG_NFILE_DESCRIPTORS=4
 CONFIG_NFILE_STREAMS=4
 CONFIG_NAME_MAX=32
-CONFIG_STDIO_BUFFER_SIZE=0
-CONFIG_NUNGET_CHARS=0
 CONFIG_PREALLOC_MQ_MSGS=0
 CONFIG_MQ_MAXMSGSIZE=0
 CONFIG_MAX_WDOGPARMS=2
 CONFIG_PREALLOC_WDOGS=4
 CONFIG_PREALLOC_TIMERS=0
 
-#
-# Filesystem configuration
-#
-CONFIG_FS_FAT=n
-CONFIG_FS_ROMFS=n
-
-#
-# Maintain legacy build behavior (revisit)
-#
-
-CONFIG_MMCSD=y
-CONFIG_MMCSD_SPI=y
-CONFIG_MTD=y
-
-#
-# SPI-based MMC/SD driver
-#
-CONFIG_MMCSD_NSLOTS=1
-CONFIG_MMCSD_READONLY=n
-CONFIG_MMCSD_SPICLOCK=12500000
-
-#
-# Block driver buffering
-#
-CONFIG_FS_READAHEAD=n
-CONFIG_FS_WRITEBUFFER=n
-
-#
-# SDIO-based MMC/SD driver
-#
-CONFIG_SDIO_DMA=n
-CONFIG_MMCSD_MMCSUPPORT=n
-CONFIG_MMCSD_HAVECARDDETECT=n
-
-#
-# TCP/IP and UDP support via uIP
-#
-CONFIG_NET=n
-CONFIG_NET_IPv6=n
-CONFIG_NSOCKET_DESCRIPTORS=0
-CONFIG_NET_SOCKOPTS=y
-CONFIG_NET_BUFSIZE=420
-CONFIG_NET_TCP=n
-CONFIG_NET_TCP_CONNS=40
-CONFIG_NET_MAX_LISTENPORTS=40
-CONFIG_NET_UDP=n
-CONFIG_NET_UDP_CHECKSUMS=y
-#CONFIG_NET_UDP_CONNS=10
-CONFIG_NET_ICMP=n
-CONFIG_NET_ICMP_PING=n
-#CONFIG_NET_PINGADDRCONF=0
-CONFIG_NET_STATISTICS=y
-#CONFIG_NET_RECEIVE_WINDOW=
-#CONFIG_NET_ARPTAB_SIZE=8
-CONFIG_NET_BROADCAST=n
-
-#
-# UIP Network Utilities
-#
-CONFIG_NET_DHCP_LIGHT=n
-CONFIG_NET_RESOLV_ENTRIES=4
-
-#
-# USB Device Configuration
-#
-CONFIG_USBDEV=n
-CONFIG_USBDEV_ISOCHRONOUS=n
-CONFIG_USBDEV_DUALSPEED=n
-CONFIG_USBDEV_SELFPOWERED=y
-CONFIG_USBDEV_REMOTEWAKEUP=n
-CONFIG_USBDEV_MAXPOWER=100
-CONFIG_USBDEV_TRACE=n
-CONFIG_USBDEV_TRACE_NRECORDS=128
-
-#
-# USB Serial Device Configuration
-#
-CONFIG_PL2303=n
-CONFIG_PL2303_EPINTIN=1
-CONFIG_PL2303_EPBULKOUT=2
-CONFIG_PL2303_EPBULKIN=5
-CONFIG_PL2303_NWRREQS=4
-CONFIG_PL2303_NRDREQS=4
-CONFIG_PL2303_VENDORID=0x067b
-CONFIG_PL2303_PRODUCTID=0x2303
-CONFIG_PL2303_VENDORSTR="Nuttx"
-CONFIG_PL2303_PRODUCTSTR="USBdev Serial"
-CONFIG_PL2303_RXBUFSIZE=512
-CONFIG_PL2303_TXBUFSIZE=512
-
-#
-# USB Storage Device Configuration
-#
-CONFIG_USBMSC=n
-CONFIG_USBMSC_EP0MAXPACKET=64
-CONFIG_USBMSC_EPBULKOUT=2
-CONFIG_USBMSC_EPBULKIN=5
-CONFIG_USBMSC_NRDREQS=2
-CONFIG_USBMSC_NWRREQS=2
-CONFIG_USBMSC_BULKINREQLEN=256
-CONFIG_USBMSC_BULKOUTREQLEN=256
-CONFIG_USBMSC_VENDORID=0x584e
-CONFIG_USBMSC_VENDORSTR="NuttX"
-CONFIG_USBMSC_PRODUCTID=0x5342
-CONFIG_USBMSC_PRODUCTSTR="USBdev Storage"
-CONFIG_USBMSC_VERSIONNO=0x0399
-CONFIG_USBMSC_REMOVABLE=y
-
-#
-# Settings for examples/uip
-#
-CONFIG_EXAMPLES_UIP_IPADDR=0x0a000002
-CONFIG_EXAMPLES_UIP_DRIPADDR=0x0a000001
-CONFIG_EXAMPLES_UIP_NETMASK=0xffffff00
-CONFIG_EXAMPLES_UIP_DHCPC=n
-
-#
-# Settings for examples/nettest
-#
-CONFIG_EXAMPLES_NETTEST_SERVER=n
-CONFIG_EXAMPLES_NETTEST_PERFORMANCE=n
-CONFIG_EXAMPLES_NETTEST_NOMAC=y
-CONFIG_EXAMPLES_NETTEST_IPADDR=0x0a000002
-CONFIG_EXAMPLES_NETTEST_DRIPADDR=0x0a000001
-CONFIG_EXAMPLES_NETTEST_NETMASK=0xffffff00
-CONFIG_EXAMPLES_NETTEST_CLIENTIP=0x0a000001
-
-#
-# Settings for examples/ostest
-#
-CONFIG_EXAMPLES_OSTEST_LOOPS=1
-CONFIG_EXAMPLES_OSTEST_STACKSIZE=1024
-CONFIG_EXAMPLES_OSTEST_NBARRIER_THREADS=3
-
-#
-# Settings for apps/nshlib
-#
-CONFIG_NSH_FILEIOSIZE=512
-CONFIG_NSH_STRERROR=n
-CONFIG_NSH_LINELEN=64
-CONFIG_NSH_NESTDEPTH=3
-CONFIG_NSH_DISABLESCRIPT=n
-CONFIG_NSH_DISABLEBG=n
-CONFIG_NSH_ROMFSETC=n
-CONFIG_NSH_CONSOLE=y
-CONFIG_NSH_TELNET=n
-CONFIG_NSH_ARCHINIT=n
-CONFIG_NSH_IOBUFFER_SIZE=512
-CONFIG_NSH_DHCPC=n
-CONFIG_NSH_NOMAC=n
-CONFIG_NSH_IPADDR=0x0a000002
-CONFIG_NSH_DRIPADDR=0x0a000001
-CONFIG_NSH_NETMASK=0xffffff00
-CONFIG_NSH_ROMFSMOUNTPT="/etc"
-CONFIG_NSH_INITSCRIPT="init.d/rcS"
-CONFIG_NSH_ROMFSDEVNO=0
-CONFIG_NSH_ROMFSSECTSIZE=64
-CONFIG_NSH_FATDEVNO=1
-CONFIG_NSH_FATSECTSIZE=512
-CONFIG_NSH_FATNSECTORS=1024
-CONFIG_NSH_FATMOUNTPT="/tmp"
-
-#
-# Architecture-specific NSH options
-#
-CONFIG_NSH_MMCSDSPIPORTNO=1
-CONFIG_NSH_MMCSDSLOTNO=0
-CONFIG_NSH_MMCSDMINOR=0
-
-#
-# Settings for examples/usbserial
-#
-CONFIG_EXAMPLES_USBSERIAL_INONLY=n
-CONFIG_EXAMPLES_USBSERIAL_OUTONLY=n
-CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL=n
-CONFIG_EXAMPLES_USBSERIAL_ONLYBIG=n
-
-CONFIG_EXAMPLES_USBSERIAL_TRACEINIT=n
-CONFIG_EXAMPLES_USBSERIAL_TRACECLASS=n
-CONFIG_EXAMPLES_USBSERIAL_TRACETRANSFERS=n
-CONFIG_EXAMPLES_USBSERIAL_TRACECONTROLLER=n
-CONFIG_EXAMPLES_USBSERIAL_TRACEINTERRUPTS=n
-
-#
-# Settings for system/usbmsc
-#
-CONFIG_SYSTEM_USBMSC_NLUNS=1
-CONFIG_SYSTEM_USBMSC_DEVMINOR1=0
-CONFIG_SYSTEM_USBMSC_DEVPATH1="/dev/mmcsd0"
-CONFIG_SYSTEM_USBMSC_TRACEINIT=n
-CONFIG_SYSTEM_USBMSC_TRACECLASS=n
-CONFIG_SYSTEM_USBMSC_TRACETRANSFERS=n
-CONFIG_SYSTEM_USBMSC_TRACECONTROLLER=n
-CONFIG_SYSTEM_USBMSC_TRACEINTERRUPTS=n
-
 #
 # Stack and heap information
 #
-CONFIG_BOOT_RUNFROMFLASH=n
-CONFIG_BOOT_COPYTORAM=n
-CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=512
 CONFIG_USERMAIN_STACKSIZE=512
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
+
+#
+# Device Drivers
+#
+CONFIG_DISABLE_POLL=y
+CONFIG_DEV_NULL=y
+# CONFIG_DEV_ZERO is not set
+# CONFIG_LOOP is not set
+# CONFIG_RAMDISK is not set
+# CONFIG_CAN is not set
+# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
+# CONFIG_PWM is not set
+# CONFIG_ARCH_HAVE_I2CRESET is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+# CONFIG_I2S is not set
+# CONFIG_RTC is not set
+# CONFIG_WATCHDOG is not set
+# CONFIG_ANALOG is not set
+# CONFIG_AUDIO_DEVICES is not set
+# CONFIG_VIDEO_DEVICES is not set
+# CONFIG_BCH is not set
+# CONFIG_INPUT is not set
+# CONFIG_LCD is not set
+# CONFIG_MMCSD is not set
+# CONFIG_MTD is not set
+# CONFIG_PIPES is not set
+# CONFIG_PM is not set
+# CONFIG_POWER is not set
+# CONFIG_SENSORS is not set
+# CONFIG_SERCOMM_CONSOLE is not set
+CONFIG_SERIAL=y
+CONFIG_DEV_LOWCONSOLE=y
+# CONFIG_16550_UART is not set
+CONFIG_ARCH_HAVE_USART1=y
+
+#
+# USART Configuration
+#
+CONFIG_USART1_ISUART=y
+CONFIG_MCU_SERIAL=y
+CONFIG_USART1_SERIAL_CONSOLE=y
+# CONFIG_NO_SERIAL_CONSOLE is not set
+
+#
+# USART1 Configuration
+#
+CONFIG_USART1_RXBUFSIZE=256
+CONFIG_USART1_TXBUFSIZE=256
+CONFIG_USART1_BAUD=38400
+CONFIG_USART1_BITS=8
+CONFIG_USART1_PARITY=0
+CONFIG_USART1_2STOP=0
+# CONFIG_USART1_IFLOWCONTROL is not set
+# CONFIG_USART1_OFLOWCONTROL is not set
+# CONFIG_SERIAL_IFLOWCONTROL is not set
+# CONFIG_SERIAL_OFLOWCONTROL is not set
+# CONFIG_USBDEV is not set
+# CONFIG_USBHOST is not set
+# CONFIG_WIRELESS is not set
+
+#
+# System Logging Device Options
+#
+
+#
+# System Logging
+#
+# CONFIG_RAMLOG is not set
+
+#
+# Networking Support
+#
+# CONFIG_ARCH_HAVE_NET is not set
+# CONFIG_ARCH_HAVE_PHY is not set
+# CONFIG_NET is not set
+
+#
+# File Systems
+#
+
+#
+# File system configuration
+#
+CONFIG_DISABLE_MOUNTPOINT=y
+CONFIG_DISABLE_PSEUDOFS_OPERATIONS=y
+# CONFIG_FS_READABLE is not set
+# CONFIG_FS_WRITABLE is not set
+# CONFIG_FS_RAMMAP is not set
+# CONFIG_FS_PROCFS is not set
+
+#
+# System Logging
+#
+# CONFIG_SYSLOG_ENABLE is not set
+# CONFIG_SYSLOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_NX is not set
+
+#
+# Memory Management
+#
+# CONFIG_MM_MULTIHEAP is not set
+# CONFIG_MM_SMALL is not set
+CONFIG_MM_REGIONS=1
+# CONFIG_ARCH_HAVE_HEAP2 is not set
+# CONFIG_GRAN is not set
+
+#
+# Audio Support
+#
+# CONFIG_AUDIO is not set
+
+#
+# Binary Formats
+#
+# CONFIG_BINFMT_DISABLE is not set
+# CONFIG_NXFLAT is not set
+# CONFIG_ELF is not set
+# CONFIG_BUILTIN is not set
+# CONFIG_PIC is not set
+# CONFIG_SYMTAB_ORDEREDBYNAME is not set
+
+#
+# Library Routines
+#
+
+#
+# Standard C Library Options
+#
+CONFIG_STDIO_BUFFER_SIZE=0
+CONFIG_STDIO_LINEBUFFER=y
+CONFIG_NUNGET_CHARS=0
+# CONFIG_LIBM is not set
+# CONFIG_NOPRINTF_FIELDWIDTH is not set
+# CONFIG_LIBC_FLOATINGPOINT is not set
+CONFIG_LIB_RAND_ORDER=1
+# CONFIG_EOL_IS_CR is not set
+# CONFIG_EOL_IS_LF is not set
+# CONFIG_EOL_IS_BOTH_CRLF is not set
+CONFIG_EOL_IS_EITHER_CRLF=y
+# CONFIG_LIBC_EXECFUNCS is not set
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
+CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=2048
+# CONFIG_LIBC_STRERROR is not set
+# CONFIG_LIBC_PERROR_STDOUT is not set
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_LIB_SENDFILE_BUFSIZE=512
+# CONFIG_ARCH_ROMGETC is not set
+# CONFIG_ARCH_OPTIMIZED_FUNCTIONS is not set
+
+#
+# Non-standard Library Support
+#
+# CONFIG_LIB_KBDCODEC is not set
+# CONFIG_LIB_SLCDCODEC is not set
+
+#
+# Basic CXX Support
+#
+# CONFIG_C99_BOOL8 is not set
+# CONFIG_HAVE_CXX is not set
+
+#
+# Application Configuration
+#
+
+#
+# Built-In Applications
+#
+
+#
+# Examples
+#
+# CONFIG_EXAMPLES_BUTTONS is not set
+# CONFIG_EXAMPLES_CAN is not set
+# CONFIG_EXAMPLES_CONFIGDATA is not set
+# CONFIG_EXAMPLES_DHCPD is not set
+# CONFIG_EXAMPLES_ELF is not set
+# CONFIG_EXAMPLES_FTPC is not set
+# CONFIG_EXAMPLES_FTPD is not set
+CONFIG_EXAMPLES_HELLO=y
+# CONFIG_EXAMPLES_HELLOXX is not set
+# CONFIG_EXAMPLES_JSON is not set
+# CONFIG_EXAMPLES_HIDKBD is not set
+# CONFIG_EXAMPLES_KEYPADTEST is not set
+# CONFIG_EXAMPLES_IGMP is not set
+# CONFIG_EXAMPLES_LCDRW is not set
+# CONFIG_EXAMPLES_MM is not set
+# CONFIG_EXAMPLES_MODBUS is not set
+# CONFIG_EXAMPLES_MOUNT is not set
+# CONFIG_EXAMPLES_NRF24L01TERM is not set
+# CONFIG_EXAMPLES_NSH is not set
+# CONFIG_EXAMPLES_NULL is not set
+# CONFIG_EXAMPLES_NX is not set
+# CONFIG_EXAMPLES_NXCONSOLE is not set
+# CONFIG_EXAMPLES_NXFFS is not set
+# CONFIG_EXAMPLES_NXFLAT is not set
+# CONFIG_EXAMPLES_NXHELLO is not set
+# CONFIG_EXAMPLES_NXIMAGE is not set
+# CONFIG_EXAMPLES_NXLINES is not set
+# CONFIG_EXAMPLES_NXTEXT is not set
+# CONFIG_EXAMPLES_OSTEST is not set
+# CONFIG_EXAMPLES_PASHELLO is not set
+# CONFIG_EXAMPLES_PIPE is not set
+# CONFIG_EXAMPLES_POLL is not set
+# CONFIG_EXAMPLES_POSIXSPAWN is not set
+# CONFIG_EXAMPLES_QENCODER is not set
+# CONFIG_EXAMPLES_RGMP is not set
+# CONFIG_EXAMPLES_ROMFS is not set
+# CONFIG_EXAMPLES_SENDMAIL is not set
+# CONFIG_EXAMPLES_SERLOOP is not set
+# CONFIG_EXAMPLES_SLCD is not set
+# CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_TCPECHO is not set
+# CONFIG_EXAMPLES_TELNETD is not set
+# CONFIG_EXAMPLES_THTTPD is not set
+# CONFIG_EXAMPLES_TIFF is not set
+# CONFIG_EXAMPLES_TOUCHSCREEN is not set
+# CONFIG_EXAMPLES_UDP is not set
+# CONFIG_EXAMPLES_UIP is not set
+# CONFIG_EXAMPLES_USBSERIAL is not set
+# CONFIG_EXAMPLES_USBTERM is not set
+# CONFIG_EXAMPLES_WATCHDOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_TIFF is not set
+
+#
+# Interpreters
+#
+# CONFIG_INTERPRETERS_FICL is not set
+# CONFIG_INTERPRETERS_PCODE is not set
+
+#
+# Network Utilities
+#
+
+#
+# Networking Utilities
+#
+# CONFIG_NETUTILS_CODECS is not set
+# CONFIG_NETUTILS_DHCPD is not set
+# CONFIG_NETUTILS_FTPC is not set
+# CONFIG_NETUTILS_FTPD is not set
+# CONFIG_NETUTILS_JSON is not set
+# CONFIG_NETUTILS_SMTP is not set
+# CONFIG_NETUTILS_TFTPC is not set
+# CONFIG_NETUTILS_THTTPD is not set
+# CONFIG_NETUTILS_UIPLIB is not set
+# CONFIG_NETUTILS_WEBCLIENT is not set
+
+#
+# FreeModBus
+#
+# CONFIG_MODBUS is not set
+
+#
+# NSH Library
+#
+# CONFIG_NSH_LIBRARY is not set
+
+#
+# NxWidgets/NxWM
+#
+
+#
+# Platform-specific Support
+#
+# CONFIG_PLATFORM_CONFIGDATA is not set
+
+#
+# System Libraries and NSH Add-Ons
+#
+
+#
+# USB CDC/ACM Device Commands
+#
+
+#
+# USB Composite Device Commands
+#
+
+#
+# Custom Free Memory Command
+#
+# CONFIG_SYSTEM_FREE is not set
+
+#
+# I2C tool
+#
+
+#
+# INI File Parser
+#
+# CONFIG_SYSTEM_INIFILE is not set
+
+#
+# FLASH Program Installation
+#
+# CONFIG_SYSTEM_INSTALL is not set
+
+#
+# FLASH Erase-all Command
+#
+
+#
+# NxPlayer media player library / command Line
+#
+# CONFIG_SYSTEM_NXPLAYER is not set
+
+#
+# RAM test
+#
+# CONFIG_SYSTEM_RAMTEST is not set
+
+#
+# readline()
+#
+# CONFIG_SYSTEM_READLINE is not set
+
+#
+# Power Off
+#
+# CONFIG_SYSTEM_POWEROFF is not set
+
+#
+# RAMTRON
+#
+# CONFIG_SYSTEM_RAMTRON is not set
+
+#
+# SD Card
+#
+# CONFIG_SYSTEM_SDCARD is not set
+
+#
+# Sysinfo
+#
+# CONFIG_SYSTEM_SYSINFO is not set
+
+#
+# USB Monitor
+#
+
+#
+# EMACS-like Command Line Editor
+#
+# CONFIG_SYSTEM_CLE is not set
+
+#
+# VI Work-Alike Editor
+#
+# CONFIG_SYSTEM_VI is not set
+
+#
+# Stack Monitor
+#
+
+#
+# USB Mass Storage Device Commands
+#
+
+#
+# Zmodem Commands
+#
+# CONFIG_SYSTEM_ZMODEM is not set
diff --git a/configs/teensy/usbmsc/defconfig b/configs/teensy/usbmsc/defconfig
index 363be08fe6..87cd9b593f 100644
--- a/configs/teensy/usbmsc/defconfig
+++ b/configs/teensy/usbmsc/defconfig
@@ -9,10 +9,14 @@ CONFIG_NUTTX_NEWCONFIG=y
 #
 # CONFIG_EXPERIMENTAL is not set
 CONFIG_DEFAULT_SMALL=y
-CONFIG_HOST_LINUX=y
+# CONFIG_HOST_LINUX is not set
 # CONFIG_HOST_OSX is not set
-# CONFIG_HOST_WINDOWS is not set
+CONFIG_HOST_WINDOWS=y
 # CONFIG_HOST_OTHER is not set
+# CONFIG_WINDOWS_NATIVE is not set
+CONFIG_WINDOWS_CYGWIN=y
+# CONFIG_WINDOWS_MSYS is not set
+# CONFIG_WINDOWS_OTHER is not set
 
 #
 # Build Configuration