ExectOS kernel is not a microkernel
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Rafal Kupiec 2024-07-23 22:50:53 +02:00
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## XT Architecture
ExectOS is a preemptive, reentrant multitasking operating system that implements the XT architecture which derives from
NT™ architecture. It is modular, and consists of two main layers: microkernel and user modes. Its' kernel mode has
full access to the hardware and system resources and runs code in a protected memory area. It consists of executive
services, which is itself made up on many modules that do specific tasks, a kernel and drivers. Unlike the NT™, system
does not feature a separate Hardware Abstraction Layer (HAL) between the physical hardware and the rest of the OS. Instead,
XT architecture integrates a hardware specific code with the kernel. The user mode is made up of subsystems and it has been
NT™ architecture. It is modular, and consists of two main layers: kernel and user modes. Its' kernel mode has full
access to the hardware and system resources and runs code in a protected memory area. It consists of executive services,
which is itself made up on many modules that do specific tasks, a kernel and drivers. Unlike the NT™, system does
not feature a separate Hardware Abstraction Layer (HAL) between the physical hardware and the rest of the OS. Instead, XT
architecture integrates a hardware specific code with the kernel. The user mode is made up of subsystems and it has been
designed to run applications written for many different types of operating systems. This allows us to implement any
environment subsystem to support applications that are strictly written to the corresponding standard (eg. DOS, or POSIX).

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#### Is ExectOS another Unix based OS?
No. ExectOS implements the XT architecture which derives from NT™ architecture. It is modular, and consists of
two main layers: microkernel and user mode. Its' kernel mode has full access to the hardware and system resources and
runs code in a protected memory area. It consists of executive services, which is itself made up on many modules that
do specific tasks, a kernel and drivers. Unlike the NT™, system does not feature a separate Hardware Abstraction
Layer (HAL) between the physical hardware and the rest of the OS. Instead, XT architecture integrates a hardware specific
code with the kernel.
two main layers: kernel and user mode. Its' kernel mode has full access to the hardware and system resources and runs
code in a protected memory area. It consists of executive services, which is itself made up on many modules that do
specific tasks, a kernel and drivers. Unlike the NT™, system does not feature a separate Hardware Abstraction Layer
(HAL) between the physical hardware and the rest of the OS. Instead, XT architecture integrates a hardware specific code
with the kernel.
#### Does ExectOS allow to use Windows drivers?
This is one of our goals. Thanks to the NT™ drivers compatibility layer provided by ExectOS, you should be able to