Abstract: A method of enabling multiple different operating systems to run concurrently on the same RISC computer, comprising selecting a first operating system to have a relatively high priority (the realtime operating system, such as C5); selecting at least one secondary operating system to have a relatively lower priority (the general purpose operating system, such as Linux); providing a common program (a hardware resource dispatcher similar to a nanokernel) arranged to switch between said operating systems under predetermined conditions; and providing modifications to said first and second operating systems to allow them to be controlled by said common program.

Abstract: A method of enabling multiple different operating systems to run concurrently on the same computer, comprising selecting a first operating system to have a relatively high priority (the realtime operating system. such as C5); selecting at least one secondary operating system to have a relatively lower priority (the general purpose operating system, such as Linux); providing a common program (a hardware resource dispatcher similar to a nanokernel) arranged to switch between said operating systems under predetermined conditions; and providing modifications to said first and second operating systems to allow them to be controlled by said common program.

Abstract: A method of enabling multiple different operating systems to run concurrently on the same computer, which is an Intel or similar Complex Instruction Set Computer architecture, comprising selecting a first operating system to have a relatively high priority (the realtime operating system, such as C5); selecting at least one secondary operating system to have a relatively lower priority (the general purpose operating system, such as Linux); providing a common program (a hardware resource dispatcher similar to a nanokernel) arranged to switch between said operating systems under predetermined conditions; and providing modifications to said first and second operating systems to allow them to be controlled by said common program.

Abstract: Multiple different operating systems are enabled to run concurrently on the same computer. A first operating system is selected to have a relatively high priority (the realtime operating system, such as C5). At least one secondary operating system is selected to have a relatively lower priority (the general purpose operating system, such as Linux). A common program (a hardware resource dispatcher similar to a nanokernel) is arranged to switch between these operating systems under predetermined conditions and modifications are provided to the first and second operating systems to allow them to be controlled by the common program.

Abstract: A method of enabling multiple different operating systems to run concurrently on the same computer, which is an Intel or similar Complex Instruction Set Computer architecture, comprising selecting a first operating system to have a relatively high priority (the realtime operating system, such as C5); selecting at least one secondary operating system to have a relatively lower priority (the general purpose operating system, such as Linux); providing a common program (a hardware resource dispatcher similar to a nanokernel) arranged to switch between said operating systems under predetermined conditions; and providing modifications to said first and second operating systems to allow them to be controlled by said common program.

Abstract: A method of enabling multiple different operating systems to run concurrently on the same RISC computer, comprising selecting a first operating system to have a relatively high priority (the realtime operating system, such as C5); selecting at least one secondary operating system to have a relatively lower priority (the general purpose operating system, such as Linux); providing a common program (a hardware resource dispatcher similar to a nanokernel) arranged to switch between said operating systems under predetermined conditions; and providing modifications to said first and second operating systems to allow them to be controlled by said common program.

Abstract: A method of enabling multiple different operating systems to run concurrently on the same computer, comprising selecting a first operating system to have a relatively high priority (the realtime operating system. such as C5); selecting at least one secondary operating system to have a relatively lower priority (the general purpose operating system, such as Linux); providing a common program (a hardware resource dispatcher similar to a nanokernel) arranged to switch between said operating systems under predetermined conditions; and providing modifications to said first and second operating systems to allow them to be controlled by said common program.

Abstract: Each driver has a global driver section comprising drive program code and global driver data, both defining driver operations associated with a corresponding class of devices. Each device has an associated driver instantiation comprising local driver data, having an internal pointer to the global driver section of the instantiated driver, and possibly at least one external pointer to another driver instantiation. A device registry forms a list of device registry entries, each corresponding to a respective one of the drive instantiations. Driveer client code may perform operations on a given device by fetching in the device registry a pointer to the driver instantiation associated with the given device, and then use operations provided by the associated driver instantiation, directly or using further operations reached in other driver instantiations by using iteratively the external printer.

Abstract: A method of enabling multiple different operating systems to run concurrently on the same computer, comprising selecting a first operating system to have a relatively high priority (the realtime operating system, such as C5); selecting at least one secondary operating system to have a relatively lower priority (the general purpose operating system, such as Linux); providing a common program (a hardware resource dispatcher similar to a nanokernel) arranged to switch between said operating systems under predetermined conditions; and providing modifications to said first and second operating systems to allow them to be controlled by said common program.

Abstract: Each driver has a global driver section comprising drive program code and global driver data, both defining driver operations associated with a corresponding class of devices. Each device has an associated driver instantiation comprising local driver data, having an internal pointer to the global driver section of the instantiated driver, and possibly at least one external pointer to another driver instantiation. A device registry forms a list of device registry entries, each corresponding to a respective one of the drive instantiations. Driveer client code may perform operations on a given device by fetching in the device registry a pointer to the driver instantiation associated with the given device, and then use operations provided by the associated driver instantiation, directly or using further operations reached in other driver instantiations by using iteratively the external printer.