Execute Channel Program
Execute Channel Program
(operating system)(EXCP) An
IBM system for low-level file
access, where the programmer is completely responsible for
providing a list of device-specific "channel comands" to be
executed by I/O channels, control units and/or devices.
The
operating system will simply check the "
CCW" chains
for security purposes (access invalid memory or outside of
file extents) and then schedule them for execution.
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