ECPS:VM/370 is a hardware assist of the VM/370 software control program. ECPS:VM/370 provides improved performance for the software system through a combination of hardware assist technologies. The assist provides hardware support for virtual machine execution of certain System/370 real machine functions. The assist also introduces instructions intended for use by the VM/370 control program. ECPS:VM/370 is defined to simplify maintenance and service of the assisted system. This paper describes the general functions of the assist and presents an explanation of the control and service capabilities provided with the assist.
/lp/association-for-computing-machinery/extended-control-program-support-vm-370-a-hardware-assist-for-the-ibm-zcn8CJZ7al