[geeks] Crackpot project, need some guidance

[Nemo]

On 18 July 2011 08:21, Mark Benson <md.benson at gmail.com> wrote (in part):
> First I need to understand the various pieces of hardware inherent in a
> microprocessor. I have done some work in the Logisim logic simulator and
> goofed with some TTL logic and building my own gates, shift registers and
> memory arrays. I've yet to look at anything beyond memory, like building
> functions, I/O buffeting and handling etc. at logic level but that'll come
> with time and more research. I am finding building and testing TTL level logic
> really enthralling and satisfying. My best achievement so far is writing a
> 16-bit (4x4) addressable static RAM. Took half of Sunday to wire up on the
> screen but it works really well. If anyone wants to see it I'll post some
> screenshots.

The TECS s/w and its book reference posted earlier is a logic
simulator written in Java.  The book is a first course in h/w design
and discusses probably all you want;  the s/w simulates it.  Samples
up to and including a simple OS are provided.