Patent ID: 6012104
Filing Date: 2000-01-04
Classification: G06F

Abstract:
A method of extending an initial channel program in a computer system, said method comprising the steps of:generating said initial channel program wherein said initial channel program comprises successive channel command words, said successive channel command words comprising at least:a final channel command word and,a penultimate channel command word to terminate said initial channel program;generating a successive channel program;modifying said final channel command word in said initial channel program such that said final channel command word causes channel control to transfer to said successive channel program, and;modifying said penultimate channel command word in said initial channel program to permit said final channel command word in said initial channel program to be executed;wherein said penultimate channel command word in said initial channel program is initially a no-operation command with the command chaining flag in the ""off"" state and is modified to permit said last channel command word in said initial channel program to be executed by causing the command chaining flag in said penultimate channel command word to be placed in the ""on"" state.