Abstract: A method of printing a multi-page job including producing separate non-bit mapped files for each page of the multi-page job, producing a page file for each page of the multi-page job, storing the page files in a memory and printing the page files in sequence. The page file may include color separations for the various colors to be printed on the page or other convenient forms of storage devoted to a single page. The page file may be in a bit mapped format or may be in the form of a continuous tone image in a format which can be easily converted into a bit-map format by the printer during the printing process. Preferably, the continuous tone image can be converted into a bit map for printing on the fly.

Abstract: Apparatus for testing a data storage system. The system includes an interface adapted for disposition between a host computer and a disk drives. The interface has a controller and an addressable memory interconnected through a bus. The system operates asynchronously in transferring data between the controller and the memory. The testing apparatus includes a generator for injecting an electrical disturbance into a predetermined point in the interface during a selected state when data is transferred between the memory and the controller. The disturbance is initiated in response to an actuation signal. A storage medium is provided for storing the state. A comparator is provided for monitoring current operating state of the interface and the selected state stored in the storage medium and for producing the activation signal when the current operating state of the system and the selected operating state have a predetermined relationship.