Virtue

Virtue's architecture was centered around the z/VM operating system, designed to manage multiple VTAM applications through a single 3270 session. The core components included a session manager, a 3270 data stream interceptor, and an application router. The session manager was responsible for handling user connections and managing the active sessions.

The 3270 data stream interceptor would capture the data streams from the 3270 terminal and analyze the data. The application router would then direct the data to the appropriate VTAM application. Communication between these components was likely handled through z/VM's internal mechanisms, such as shared memory or inter-process communication (IPC).

Configuration parameters were likely stored in z/VM control files, defining the applications accessible through Virtue and the associated session settings. The system would have integrated with z/VM's security features for authentication and access control. Due to its unsupported status, specific details on API endpoints and communication protocols are unavailable.

However, the system likely did not expose external APIs. The network requirements would have been dictated by the z/VM and VTAM configurations. For migration, consider alternatives like IBM Session Manager for z/VM, which offers similar functionality with ongoing support.

The migration process involves reconfiguring 3270 sessions to utilize the new session manager, which may require changes to user profiles and application configurations.