摘要:
In a real-time printing system, in which large blocks of digital data corresponding to page images must be located in a memory via a translation table and accessed from the memory within a very narrow time frame, the memory-management internal program of an operating system is overridden by external instructions which lock the translation table in memory.
摘要:
A system for retrieving data representative of individual page images to be printed from a disk drive utilizes a priority system in which individual software entities within the printing apparatus compete for functional access to the hard-drive memory. Different elements, such as the decomposer, and other software entities within the control system are assigned priorities, and commands from the various elements and software entities are executed by the control system in order of the priority of their sources.