Progress on creating all the hardware

I am making all the schematics and taking pics of all the hardware. I am also videoing all the progress.
Next thing I will be doing is simulating all the schematics before I build the more complex parts.

Just trying to get my blog out there

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So I want to draw as many people to my blog as I can. Why you may ask? I want to be able to get comments that will help me better understand the people who would want to buy a DIY computer and help educate people the easy and fun way

The memory map

Activity 34

Creating the memory map was a little confusing because the output switching but after a little trial and error and studying the memory map in the book and arranging the chips in the order of the book I got them all to work. Now I need to figure out how to make my own keyboard and video on my own and implement them. I do have a book on creating my own video game console so I am going to combined that with what I have and it should lead me in the right direction.   

Update on the 4bit ripple comparator

After looking at more info on the comparator I decided to create a 1bit comparator in Logisim. (http://ozark.hendrix.edu/~burch/logisim/)
It came out great because then I found the equation for the comparator and used it to make the 1bit into a 4bit ripple comparator. Here is how it is.

The inputs are always true or on tell it is attached to another one. I am not 100% that this is the best way to do it. Let me know if there is a batter way