Building screen and keyboard RAM

Posted by tyler1313 on
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Building-screen-and-keyboard-RAM-tp4032345.html

I'm trying to build the hack computer on a program called logisim. I'm curious about how to build some of the built in chips in this course as there is no explanation of how there are built here. If I was going to build say the screen and keyboard RAM, how big (how many registers) would they each be and would I build them exactly the same as the RAM16k chip? In this case, the only difference between the RAM 16K and the screen/keyboard RAM is that the value of the screen registers affects the pixels on screen and the value of the keyboard registers is affected by keyboard input?