Hypervisor Call in a Computer Extended Address Instruction
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
A technique is described whereby a computer instruction, called "Hypervisor Call" (HVC), is designed into the instruction set so as to provide a method of calling for support services when multiple control programs are run concurrently. In computer systems which support the ability to have concurrent execution of multiple dissimilar control programs, there is a requirement to provide a method so as to support the ability to call for common system services, such as address space management, file management, communication services, etc. The Hypervisor Call instruction is essentially a higher level of supervisory instruction and is designed into the instruction set of the computer.