Introduction
This article will demonstrate how to implement .NET code that relies on Windows APIs or internal calls in Cosmos. In addition it will cover how to interface directly to the hardware using Cosmos and assembly or X#.
What is Cosmos?Cosmos is an operating system development kit (more info) which uses Visual Studio as its development environment. Despite C# in the name, any .NET based language can be used including VB.NET, Fortran, Delphi Prism, IronPython, F# and more. Cosmos itself and the kernel routines are primarily written in C#, and thus the Cosmos name. Besides that, NOSMOS (.NET Open Source Managed Operating System) sounds stupid. Cosmos is not an operating system in the traditional sense, but instead it is an "Operating System Kit", or as I like to say "Operating System Legos". Cosmos lets you create operating systems just as Visual Studio and C# normally let you create applications. Most users can write and boot their own operating system in just a few minutes, all using Visual Studio. Cosmos supports integrated project types in Visual Studio, and an integrated debugger, breakpoints, watches, and more. You can debug your operating system the same way that you debug a normal C# or VB.NET application.
The Need For Plugs Plugs are needed in three scenarios in Cosmos. Internal Calls
PInvoke
Direct Assembly Internal Calls and PInvoke Some methods in .NET classes are implemented without using .NET code. They are implemented using native code. There are two reasons for this: The method relies on the Windows API (PInvoke)
The method relies on highly optimized C++ or assembly (internal calls) which exist in the .NET runtime. PInvokes are used to draw to the screen, access existing Windows encryption API's, access networking, and other similar functions. Internal Calls (icalls) are used for classes which require direct access to the .NET runtime. Examples are classes which need to access memory management, or in some cases for raw speed. The Math.Pow method uses internal call. Plugs can be written in C# (or any .NET language), or assembly. Direct Assembly To talk to hardware, Cosmos must be able to interact with the PCI bus, CPU IO Bus, memory, and more. Memory can usually be accessed using unsafe pointers, however in other cases assembly code must be handwritten. Plugs can be used to interface C# to assembly code directly, making the assembly calls callable as if normal C# code is being called. Read more: Codeproject
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This article will demonstrate how to implement .NET code that relies on Windows APIs or internal calls in Cosmos. In addition it will cover how to interface directly to the hardware using Cosmos and assembly or X#.
What is Cosmos?Cosmos is an operating system development kit (more info) which uses Visual Studio as its development environment. Despite C# in the name, any .NET based language can be used including VB.NET, Fortran, Delphi Prism, IronPython, F# and more. Cosmos itself and the kernel routines are primarily written in C#, and thus the Cosmos name. Besides that, NOSMOS (.NET Open Source Managed Operating System) sounds stupid. Cosmos is not an operating system in the traditional sense, but instead it is an "Operating System Kit", or as I like to say "Operating System Legos". Cosmos lets you create operating systems just as Visual Studio and C# normally let you create applications. Most users can write and boot their own operating system in just a few minutes, all using Visual Studio. Cosmos supports integrated project types in Visual Studio, and an integrated debugger, breakpoints, watches, and more. You can debug your operating system the same way that you debug a normal C# or VB.NET application.
The Need For Plugs Plugs are needed in three scenarios in Cosmos. Internal Calls
PInvoke
Direct Assembly Internal Calls and PInvoke Some methods in .NET classes are implemented without using .NET code. They are implemented using native code. There are two reasons for this: The method relies on the Windows API (PInvoke)
The method relies on highly optimized C++ or assembly (internal calls) which exist in the .NET runtime. PInvokes are used to draw to the screen, access existing Windows encryption API's, access networking, and other similar functions. Internal Calls (icalls) are used for classes which require direct access to the .NET runtime. Examples are classes which need to access memory management, or in some cases for raw speed. The Math.Pow method uses internal call. Plugs can be written in C# (or any .NET language), or assembly. Direct Assembly To talk to hardware, Cosmos must be able to interact with the PCI bus, CPU IO Bus, memory, and more. Memory can usually be accessed using unsafe pointers, however in other cases assembly code must be handwritten. Plugs can be used to interface C# to assembly code directly, making the assembly calls callable as if normal C# code is being called. Read more: Codeproject
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