Coupling virtual machines and system construction
M Berthaud, M. Jacolin, Ph. Potin, H. Savary · 1973
The behavior of a system running in one virtual machine (OBJECT) is made accessible to an external observer through another virtual machine (SPY) coupled to the previous one. Given the independence of virtual machines, it is possible to run in SPY a fully operational system to which suitable components are added in order to achieve integration and debugging of new systems in OBJECT.