CompuServe Messages

Thanks for the reply. The PD resident places copies of the programs in ram. When they are executed, only the data allocation areas are added to the space taken in ram by the program. Thus, the program doesn't "load" twice — ram copy plus loaded copy. The DEC program actually builds an index file of the track and sector at which a program is located on disk. When the program is called, the index is searched, rather than the disk. Thus speeding access to the program. In effect, it indexes the disk. Much like an indexed file.