Data Processing Arrangement

1 . A data processing arrangement comprising:

a system-host processor that is provided with an operating system and an operating-system-message transceiver for receiving an operating-system-related message corresponding with a service request and for sending an operating-system-related message corresponding with a service response;

a system-guest processor that is provided with an operating-system simulator arranged to send an operating-system-related message to the system-host processor in response to a service request from a task that the system-guest processor carries out, and to provide a service response to the task in response to an operating-system-related message from the system-host processor.

2 . A data processing arrangement as claimed in claim 1 , wherein the data processing arrangement comprises a plurality of system-guest processors the operating system being arranged to provide interprocess synchronization between various tasks that the plurality of system-guest processors have been programmed to carry out.

3 . A data processing arrangement as claimed in claim 2 , wherein the operating system is arranged to provide interprocess synchronization on the basis of semaphores, the respective operating-system simulator being arranged to cause the operating system to carry out a wait function and a signal function in response to a wait-function service request and a signal-function service request, respectively.

4 . A data processing arrangement as claimed in claim 1 , wherein the operating-system simulator is arranged to make the system-guest processor switch to another task, in response to the operating-system-related message from the system-host processor.

5 . A data processing arrangement as claimed in claim 1 , wherein the system-host processor is in the form of an integrated circuit device and wherein the system-guest processor is in the form of another integrated circuit device.

6 . A method of operating a data processing arrangement that comprises a system-host processor and a system-guest processor, the method comprising:

an operating system simulation step in which the system-guest processor sends an operating-system-related message to the system-host processor in response to a service request from a task E that the system-guest processor carries out; and

an operating system message reception step in which the system-host processor causes the operating system to provide a service in response to the operating-system-related message from the system-guest processor.

7 . A method as claimed in claim 6 , wherein the service comprises a service response for the system-guest processor, the method comprising:

an operating system message transmission step in which the system-host processor sends an operating-system-related message to the system-guest processor, the operating-system-related message corresponding with the service response; and

a complementary operating system simulation step in which the system-guest processor acts in accordance with the service response in response to the operating-system-related message received from the system-host processor.

8 . A computer program product for a data processing arrangement that comprises a system-host processor and a system-guest processor, the computer program product comprising an operating-system simulator in the form of a set of instructions that, when loaded into the system-guest processor, causes the system-guest processor to carry out:

an operating system simulation step in which the system-guest processor sends an operating-system-related message to the system-host processor in response to a service request from a task that the system-guest processor carries out, the operating-system-related message causing an operating system on the system-host processor to provide a service for the task that are the system-guest processor carries out.

9 . A computer program product as claimed in claim 8 , wherein the operating-system simulator further causes the system-guest processor to carry out:

a complementary operating system simulation step in which the system-guest processor acts in accordance with a service response in response to an operating-system-related message received from the system-host processor.

10 . A computer program product for a data processing arrangement that comprises a system-host processor and a system-guest processor, the computer program product comprising an operating-system-message transceiver in the form of a set of instructions that, when loaded into the system-host processor, causes the system-host processor to carry out:

an operating system message reception step in which the system-host processor causes an operating system on the system-host processor to provide a service in response to an operating-system-related message from the system-guest processor.

11 . A computer program product as claimed in claim 10 , wherein the operating-system-message transceiver further causes the system-host processor to carry out:

an operating system message transmission step in which the system-host processor sends an operating-system-related message to the system-guest processor, the operating-system-related message corresponding with a service response.

12 . A communication apparatus comprising a data processing arrangement as claimed in claim 1 , and a human interface device that is functionally coupled to the data processing arrangement.