I was able to run 2 simultaneous and separate sessions from 2 windows laptops to a single mac mini, using Vines server. We had to have two users logged onto the Mac. Download the free trial version below to get started. Double-click the downloaded file to install the software. Raspberry Pi - Wikipedia. The Raspberry Pi is a series of small single- board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools and in developing countries.[4][5][6] The original model became far more popular than anticipated,[7] selling outside of its target market for uses such as robotics. Peripherals (including keyboards, mice and cases) are not included with the Raspberry Pi. Some accessories however have been included in several official and unofficial bundles.[7]According to the Raspberry Pi Foundation, over 5 million Raspberry Pis have been sold before February 2. British computer.[8] By November 2. March 2. 01. 7 1. They are made in a Sony factory in Pencoed, Wales[1. Overview[edit]. The Raspberry Pi Zero, a US$5 model first introduced in 2. Several generations of Raspberry Pis have been released. The first generation (Raspberry Pi 1 Model B) was released in February 2. It was followed by the simpler and cheaper Model A. In 2. 01. 4, the Foundation released a board with an improved design in Raspberry Pi 1 Model B+. These boards are approximately credit- card sized and represent the standard mainline form- factor. Improved A+ and B+ models were released a year later. A "Compute Module" was released in April 2. The Raspberry Pi 2 which added more RAM was released in February 2. A Raspberry Pi Zero with smaller size and reduced input/output (I/O) and general- purpose input/output (GPIO) capabilities was released in November 2. US$5. Raspberry Pi 3 Model B released in February 2. Wi. Fi, Bluetooth and USB boot capabilities.[1. As of January 2. 01. Raspberry Pi 3 Model B is the newest mainline Raspberry Pi. Raspberry Pi boards are priced between US$5–3. On 2. 8 February 2. Raspberry Pi Zero W was launched, which is identical to the Raspberry Pi Zero, but has the Wi- Fi and Bluetooth functionality of the Raspberry Pi 3 for US$1. All models feature a Broadcomsystem on a chip (So. C), which includes an ARM compatible central processing unit (CPU) and an on- chip graphics processing unit (GPU, a Video. Core IV). CPU speed ranges from 7. MHz to 1. 2 GHz for the Pi 3 and on board memory range from 2. MB to 1 GB RAM. Secure Digital (SD) cards are used to store the operating system and program memory in either the SDHC or Micro. SDHC sizes. Most boards have between one and four USB slots, HDMI and composite video output, and a 3. Lower level output is provided by a number of GPIO pins which support common protocols like I²C. The B- models have an 8. P8. CEthernet port and the Pi 3 and Pi Zero W have on board Wi- Fi 8. Bluetooth. The organisation behind the Raspberry Pi now consists of two arms. Originally developed under the auspices of the Raspberry Pi Foundation, the success of the Pi Model B prompted the Foundation to set up Raspberry Pi Trading, with Dr Eben Upton as CEO, to develop the third model, the B+. No matter how careful you are, if you’re not diligent it’s easy for your inbox to spiral out of control. And when it gets too full, you end up missing the emails. Raspberry Pi Trading is responsible for developing the technology while the Foundation is an educational charity that exists to get that message out to schools. Raspberry Pi Trading reinvests about a third of its profit in R& D, and the rest goes to the foundation. The Foundation provides Raspbian, a Debian- based Linux distribution for download, as well as third- party Ubuntu, Windows 1. IOT Core, RISC OS, and specialised media center distributions.[1. ![]() It promotes Python and Scratch as the main programming language, with support for many other languages.[1. The default firmware is closed source, while an unofficial open source is available.[1. Hardware[edit]The Raspberry Pi hardware has evolved through several versions that feature variations in memory capacity and peripheral- device support. This block diagram depicts Models A, B, A+, and B+. Model A, A+, and the Pi Zero lack the Ethernet and USB hub components. The Ethernet adapter is internally connected to an additional USB port. In Model A, A+, and the Pi Zero, the USB port is connected directly to the system on a chip (So. C). On the Pi 1 Model B+ and later models the USB/Ethernet chip contains a five- point USB hub, of which four ports are available, while the Pi 1 Model B only provides two. On the Pi Zero, the USB port is also connected directly to the So. C, but it uses a micro USB (OTG) port. Processor[edit]. The Raspberry Pi 2 uses a 3. MHz quad- core ARM Cortex- A7 processor. The Broadcom BCM2. So. C used in the first generation Raspberry Pi is somewhat equivalent to the chip used in first modern generation smartphones (its CPU is an older ARMv. MHz. ARM1. 17. 6JZF- S processor, Video. Core IV graphics processing unit (GPU),[2. RAM. It has a level 1 (L1) cache of 1. KB and a level 2 (L2) cache of 1. KB. The level 2 cache is used primarily by the GPU. The So. C is stacked underneath the RAM chip, so only its edge is visible. The earlier models of Raspberry Pi 2 use a Broadcom BCM2. So. C with a 9. 00 MHz 3. ARM Cortex- A7 processor, with 2. KB shared L2 cache.[2. The Raspberry Pi 2 V1. Broadcom BCM2. 83. RealVNC is a company that provides remote access software. The software consists of a server and client application for the Virtual Network Computing (VNC) protocol.So. C with a 1. 2 GHz 6. ARM Cortex- A5. 3 processor[2. So. C which is used on the Raspberry Pi 3. The Raspberry Pi 3 uses a Broadcom BCM2. So. C with a 1. 2 GHz 6. ARM Cortex- A5. 3 processor, with 5. KB shared L2 cache.[2. Performance[edit]The Raspberry Pi 3, with a quad- core Cortex- A5. Raspberry Pi 1.[2. This was suggested to be highly dependent upon task threading and instruction set use. Benchmarks showed the Raspberry Pi 3 to be approximately 8. Raspberry Pi 2 in parallelized tasks.[2. Raspberry Pi 2 includes a quad- core Cortex- A7 CPU running at 9. MHz and 1 GB RAM. It is described as 4–6 times more powerful than its predecessor. The GPU is identical to the original.[2. In parallelized benchmarks, the Raspberry Pi 2 could be up to 1. Raspberry Pi 1 Model B+.[2. While operating at 7. MHz by default, the first generation Raspberry Pi provided a real- world performance roughly equivalent to 0. GFLOPS.[2. 8][2. 9] On the CPU level the performance is similar to a 3. MHz Pentium II of 1. The GPU provides 1 Gpixel/s or 1. Gtexel/s of graphics processing or 2. GFLOPS of general purpose computing performance. The graphical capabilities of the Raspberry Pi are roughly equivalent to the performance of the Xbox of 2. The LINPACK single node compute benchmark results in a mean single precision performance of 0. GFLOPS and a mean double precision performance of 0. GFLOPS for one Raspberry Pi Model- B board.[3. A cluster of 6. 4 Raspberry Pi Model B computers, labeled "Iridis- pi", achieved a LINPACK HPL suite result of 1. GFLOPS (n=1. 02. 40) at 2. US$4. 00. 0.[3. 0]Overclocking[edit]The CPU chips of the first and second generation Raspberry Pi board did not require cooling, such as a heat sink, unless the chip was overclocked, but the Raspberry Pi 2 So. C may heat more than usual under overclocking.[citation needed]Most Raspberry Pi chips could be overclocked to 8. MHz, and some to 1. MHz. There are reports the Raspberry Pi 2 can be similarly overclocked, in extreme cases, even to 1. MHz (discarding all safety features and over- voltage limitations). In the Raspbian. Linux distro the overclocking options on boot can be done by a software command running "sudo raspi- config" without voiding the warranty.[3. In those cases the Pi automatically shuts the overclocking down if the chip reaches 8. C (1. 85 °F), but it is possible to override automatic over- voltage and overclocking settings (voiding the warranty); an appropriately sized heatsink is needed to protect the chip from serious overheating. Newer versions of the firmware contain the option to choose between five overclock ("turbo") presets that when used, attempt to maximize the performance of the So. C without impairing the lifetime of the board. This is done by monitoring the core temperature of the chip, the CPU load, and dynamically adjusting clock speeds and the core voltage. When the demand is low on the CPU or it is running too hot the performance is throttled, but if the CPU has much to do and the chip's temperature is acceptable, performance is temporarily increased with clock speeds of up to 1 GHz depending on the individual board and on which of the turbo settings is used. The seven overclock presets are: none; 7. MHz ARM, 2. 50 MHz core, 4. MHz SDRAM, 0 overvoltingmodest; 8. MHz ARM, 2. 50 MHz core, 4. MHz SDRAM, 0 overvolting,medium; 9. MHz ARM, 2. 50 MHz core, 4. MHz SDRAM, 2 overvolting,high; 9. MHz ARM, 2. 50 MHz core, 4. MHz SDRAM, 6 overvolting,turbo; 1. MHz ARM, 5. 00 MHz core, 6. MHz SDRAM, 6 overvolting,Pi 2; 1.
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