:PROPERTIES: :ID: b188d6f2-13a9-4fbf-9ad6-8884f22e8ba6 :mtime: 20231013033807 :ctime: 20231013033713 :END: #+title: read only memory #+filetags: :public:project: * Definition *Read-only memory*, abbreviated as *ROM*, is a data storage device which is written only once at the time of the manufacture of the device. Essentially, ROM is a look-up table * Use for implementing combinational logic If you use ROM as a look-up table, you can implement simple boolean functions. This method is reasonably efficient if lots of [[id:3033ebb1-4429-4d30-b526-24b4d2988d38][Miniterm]]s need to be generated. This method can also be inefficient if there are too many variales. If the miniterms are sparse, your memory will be full of 0s.