Hello and thank all of you who read and respond to this post. I only have logisim, due to my wealth meter if not free I can not use the tool. I am trying to build a game console simulated. I do not know if the text books here cover what I need to know, if they do please direct me where and to the correct tome of text. I know a lot, yet I know little in the subject I am doing, I do not want to go FPGA off the back, I may go that route later I want old school I understand logic gate and nand or nor not buff for nxor how they work with two inputs unless buff or not of a one input. I understand ttl of buff and nand gates only in CMOS. I can use clarify in that I know I need RAM and I/O ports in operations an alu that does the binary math actions a gpu, rom. I have an idea of what a register is and an accmlator and a decoder mux encoder but love more clarity. I like to understand how to not solve Boolean exsprsions but how and why I need them to make what I am doing and how to do math better. I know I need to build a OS thought assybly and since small room of 256 of ram. I feel as if I am in a whirlwind of bits of what I need to know and like guidance to basicly ttl my logic gates to build logic gates then my gates to build all my parts in IC's then to connect or distribution and condince the logic I guess in kmaps need help in learning it right and with wird wrap arounds. Then take that and build OS looking to make this simple so I can expand on this into 64 bit but focus on this to get my self well grounded, hehe grounded in this. If a four bit would be easier I welcome this becuase I can just dubble it and give half men and other lsb operations and have it 8 bit from a 4 bit split like ram or am I way off. What is the major difference between latch and flipflop if I put a feed back on a latch would it be easier to latch than flip-flops at least in parts but maybe not in control of pulse counting idk. I need help in clarity in this subject and to emulate it in logisim. I am very happy with any input in any part or parts of my goal that you are able to assist or advise with. Note simple but connective in responses please I have autism and I may ask questions to something that may be well rooted to its smallist or simplified version of a question on its answers. How I think like you give an algebra exsprsion simplified then I would want to turn it into a polynomial and work it from there kind of guy so thanks for your help and willingness aswell patience with me.