Program Changes and Data Capacity: A Symbiotic Relationship

Memory space in a computer — regardless of how much you have plugged in — is allocated for certain jobs. Two major sections of memory that concern ZX PRO/FILE are the program area of memory and the variables area. When PRO/FILE runs, all files are stored in the variables area. With 16K attached, the files (also called data) go into an array of characters: D$(11000). Since the total amount of memory is limited to 16K by the size of the RAM pack, most of your memory is used to store the 11000 characters of D$. The remainder is used to hold the actual program and a few other things like the system variables and display file.