Abstract: A state controller for an electronic reprographic system for controlling system operations when processing requests in which the system has a plurality of hardware and software system components providing discrete services for processing requests and maintaining operation of the system, and job programming means including a display screen for inputting requests, including: a state holder for monitoring the current operating state of the system components; plural discrete job processing virtual machines with each of the virtual machines having at least one service associated with it for implementing the virtual machine; each of the services having at least one of the system components for carrying out the service; and a scheduler for managing resources of and setting priorities for the virtual machines to process the requests in an efficient manner, the scheduler being adapted to cause memory from a first one of the virtual machines to be distributed to a second one of the virtual machines when the second one

Abstract: An auxiliary ROM memory system which is hierarchied for providing for the contingency of additional read-only memory control program storage requirements in excess or in lieu of the predetermined ROM memory provided on-board a microprocessor based central processing unit module, and a read-only memory altering capability utilizing programmable read-only memory to expedite the implementation/installation of changes to the ROM bit patterns. The alterable PROM storage comprises bulk PROM memory including a first PROM set that is mutually exclusive as to existing on-board ROM memory for addressably branching to code extensions and/or in-line code insertions, and/or a second PROM set that is mutually inclusive as to existent on-board and contingent ROM memory for decodably addressing large-scale code overlays thereto.

Abstract: A processing system having central control including an automated condition responsive system for automatically sequencing and integrating the operation of selected external features utilizable in conjunction with an electrostatographic reproducing process. The processing operation is monitored by means of a central timing control initiated in accordance with a preprogrammed sequence for each of the peripheral operations to be performed in conjunction with the central processing sequence. Sequence control is provided for controlling the sequencing of the peripheral operation in accordance with the timing cycles controlling the central reproducing process. More specifically, control means are set up for automatic document handling, sorting, billing, and jam and recovery control. By utilization of central command logic and separate processing logic, integration of all these operations in accordance with externally controlled program operation is achieved.