Tag: OS

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Symbian cuts off the impotents of iPhone and Android

 symbian_os

More than 22 million Symbian phones shipped in the fourth quarter of 2007, making a total of 77 million in the year, and bringing in $349 million in royalties for the year

The Symbian operating system grew 50 percent over 2007, and is well placed to grow in future, according to the Symbian chief executive Nigel Clifford – who shrugged off Google Android, Apple iPhone and Microsoft Windows phones at Mobile World Congress.

But Symbian is making its operating system cheaper, in order to reach beyond the smartphone sector to lower-cost phones, which are expected to grow much faster than any other kind of device in the next few years.

source:pcworld 

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COSMOS – A New Open Source OS Available

cosmos

Cosmos (C# Open Source Managed Operating System) is an operating system project implemented completely in CIL compliant languages. The team is committed to using C#, however any .NET language is usable.

Cosmos runs in QEMU, VMWare, and VirtualPC. QEMU is best for debugging as it has extra debugging support which we use to integrate with GDB.

Cosmos includes a compiler (IL2CPU, which is part of Cosmos) that reads the input file (usually the shell) and Cosmos libraries and compiles the resulting IL to x86 code. IL2CPU has a layer for cross platform and we plan to support other processors and platforms, including x64. IL2CPU also supports certain extension methods which allow C# code to interact directly with the CPU, registers, and ports in the kernel. IL2CPU contains some inline assembler, but there are no ASM files that need to be linked in.

Currently IL2CPU first outputs raw asm files (with IL comments) and then processes them through nasm (a free assembler). Later they are  planning to emit directly to binary.

If you just want to play with Cosmos:

Other resources:

If you are interested in kernel development:

  • Get source from CodePlex
  • Read the full requirements. They are pretty basic though, and everything you need except for Windows (For development) is free.
  • Read Getting Started

 source:cosmos