The Boston Diaries

The ongoing saga of a programmer who doesn't live in Boston, nor does he even like Boston, but yet named his weblog/journal “The Boston Diaries.”

Go figure.

Wednesday, March 20, 2013

Simple

You just went to the Google home page.

Simple, isn't it?

What just actually happened?

Well, when you know a bit of about how browsers work, it's not quite that simple. You've just put into play HTTP, HTML, CSS, ECMAscript, and more. Those are actually such incredibly complex technologies that they'll make any engineer dizzy if they think about them too much, and such that no single company can deal with that entire complexity.

Let's simplify.

Via Hacker News, Jean-Baptiste Queru - Google+ - Dizzying but invisible depth

It's hard to simplify how modern computers work. Sure, I could say something along the lines of “a computer consists of three components, memory, which stores a program and data, the CPU, which executes the program out of memory and input/output devices, like a keyboard, the monitor.” But while I'm not outright lying, I am grossly simplifying and skipping a lot of details (for instance, memory could be considered an input/output device, but it's treated differently than other input/output devices, except when it isn't).

For instance:

Let's say you've just bought a MacBook Air, and your goal is to become master of the machine, to understand how it works on every level.

The total of all of this is 79 pages shy of eleven thousand. I neglected to include man pages for hundreds of system utilities and the Xcode documentation. And I didn't even touch upon the graphics knowhow needed to do anything interesting with OpenGL, or how to write good C and Objective-C or anything about object-oriented design, and …

A Complete Understanding is No Longer Possible

And those 11,000 pages exclude documentation on the hardware. For comparison, the Color Computer (my first computer). The TRS-80 Color Computer Technical Reference Manual, which covers the hardware, is 69 pages; the technical reference for the MC6809 (the CPU) is 35 pages; the reference for the MC6821 (an I/O adaptor) is 11 pages; the reference for the MC6847 (the video graphics chip) is 26 pages, and the EDTASM+ manual (the assembler) is 68 pages.

So, in 209 pages, you will know enough to program the Color Computer (assuming you know how to program in assembly to begin with—else tack on another 294 pages for TRS-80 Color Computer Assembly Language Programming for a little over 500 pages).

Even “Project: Wolowizard” is rather insane, requiring knowledge of SS7, IP, HTTP, Solaris, Linux, C, C++, Javascript, Java, Lua, Ruby, Python, SQL, HTML, CSS, XML and that's just the “off-the-shelf” stuff we're using (and all the documentation for that probably exceeds 11,000 pages quite easily; there are probably over 2,000 pages just for SS7 and IP alone)—I'm not mentioning the file formats and protocols we've developed for “Project: Wolowizard” (just the test plan for one component is over 150 pages, and there's at least seven components just on the backend).

It's simple.

Obligatory Picture

[It's the most wonderful time of the year!]

Obligatory Links

Obligatory Miscellaneous

You have my permission to link freely to any entry here. Go ahead, I won't bite. I promise.

The dates are the permanent links to that day's entries (or entry, if there is only one entry). The titles are the permanent links to that entry only. The format for the links are simple: Start with the base link for this site: http://boston.conman.org/, then add the date you are interested in, say 2000/08/01, so that would make the final URL:

http://boston.conman.org/2000/08/01

You can also specify the entire month by leaving off the day portion. You can even select an arbitrary portion of time.

You may also note subtle shading of the links and that's intentional: the “closer” the link is (relative to the page) the “brighter” it appears. It's an experiment in using color shading to denote the distance a link is from here. If you don't notice it, don't worry; it's not all that important.

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