I'm studying CS, and we have a course called "computer systems architecture" which is merger of two former "logic systems theory" and "mips asm" courses (I hope my translations are correct). We have LST lab where we are supposed to put various 74xx chips into circuits, then analyze how they work. Teacher suggested that we simulate those circuits in home, with a "CAD" software (better marks) - well, the only app I've heard about is Circuit Maker which is... outdated. 15yo. It was written apparently for Win 95 - on modern OS (Win8 64bit) it's no-go. Is there any modern alternative to CM that has not too steep learning curve?
PS.I don't need professional package - it's going to be 6 circuits in total.