English Abstract
This paper describes the conversion of symbolic machine instructions provided by the user through a keyboard into machine code, which computer hardware is able to interpret. Key punches are first coded in ASCII-format and stored in computer memory. Then this information is processed by an as-sembler program using several tables and converted into binary object program for execution. This functionality is simulated and displayed on a screen to facilitate the comprehension to an undergraduate student. This program will be available during spring 2000 in URL http://www.ee.oulu.fi/~pl1/tkt1/ .