The adapter allows one computer system to be treated as an input/output device by another. It is used "to link the processing units in a loosely coupled multiprocessing system.
Virtual channel-to-channel adapters (VCTCA) are often used to communicate between two virtual machines in the z/VM operating system. The Virtual Machine Communication Facility (VMCF), and later Inter User Communication Vehicle (IUCV) are now often used in place of VCTCAs because they provide a simpler interface and improved performance.
- IBM Corporation (1968). IBM System/360 Model 65 Functional Characteristics (PDF). p. 10.
- IBM Corporation. "System/370 Model 158". IBM Archives. Retrieved January 7, 2014.
- Jensen, R.M. (1979). "A formal approach for communication between logically isolated virtual machines". IBM Systems Journal. 18 (1): 71–92. Retrieved Aug 21, 2019.