What is Portage?
Portage is the heart of Gentoo, and performs many key functions. For one, Portage is the software distribution system for Gentoo. To get the latest software for Gentoo, you type one command: emerge --sync. This command tells Portage to update your local "Portage tree" over the Internet. Your local Portage tree contains a complete collection of scripts that can be used by Portage to create and install the latest Gentoo packages. Currently, we have more than 10000 packages in our Portage tree, with updates and new ones being added all the time.
Portage is also a package building and installation system. When you want to install a package, you type emerge packagename, at which point Portage automatically builds a custom version of the package to your exact specifications, optimizing it for your hardware and ensuring that the optional features in the package that you want are enabled -- and those you don't want aren't.
Portage also keeps your system up-to-date. Typing emerge -uD world -- one command -- will ensure that all the packages that you want on your system are updated automatically.
What is NETUS?
- CPU Atmel ATSAM9G20 based on ARM926EJ-S™ ARM® Thumb® Processor with a clock speed of 400MHz
- 64MBytes SDRAM with 32bit access
- 8MBytes Dataflash
- Size 40x40mm
- Weight: 10g
- Four 60 pin connectors (0.8mm pitch) with the following signals available on top and bottom sides
- 1 USB 2.0 Full Speed (12 Mbits per second) Device Port
- 2 USB 2.0 Full Speed (12 Mbits per second) Host and Double Port
- 1 Ethernet MAC 10/100 Base T
- Image Sensor Interface (ITU-R BT. 601/656 12 bit)
- One Two-slot MultiMedia Card Interface (MCI). SDCard/SDIO and MultiMediaCard™ Compliant
- Four Universal Synchronous/Asynchronous Receiver Transmitters (USART) RS485 support
- Two 2-wire UARTs
- Two Master/Slave Serial Peripheral Interfaces (SPI)
- One Synchronous Serial Controller (SSC). I²S Analog Interface Support
- Two Wire Interface (TWI read more...)
- Four-channel 10-bit ADC
- 80 general purpose I/O lines multiplexed with up to two peripheral I/Os
- Individually Programmable Open-drain, Pull-up Resistor and Synchronous Output
- All I/O Lines are Schmitt Trigger when programmed as inputs
- Input Change Interrupt Capability on Each I/O Line
- Serial 2 wire console port
- JTAG Console and Boundary Scan on All Digital Pins (IEEE® 1149.1)
- Two Three-channel 16-bit Timer/Counters with PWM Generation
- Watchdog timer
- Real-time clock (optional external battery backup)
- Very Slow Clock Operating Mode
- Supported by the Netus Evaluation Board, Netus Carrier Boards and extensive third-party application development tools.
- Supports Linux and extensive environments available for the AT91SAM processors.