Format and link fix 2006/grothe/README.md

2006/grothe/README.md

@@ -1,9 +1,7 @@
-# Most Obfuscaed Audio
+# Most Obfuscated Audio
 
-    Aaron Grothe
+Aaron Grothe  
-    2205 South 51st Street
+US  
-    Omaha, NE 68106
-    US
 
 ## To build:
 
@@ -43,86 +41,105 @@ feature to this entry.  :-)
 ## Selected Author's Comments:
 
 The program draws patterns on the screen that can be picked up by a
-shortwave radio.   It emulates the frequencies for an old fashion touch
+[shortwave radio](https://en.wikipedia.org/wiki/Shortwave_radio).  It emulates
-tone phone, so old songs can be played by hitting 0-9,#, and *.
+the frequencies for an old fashion touch tone phone, so old songs can be played
+by hitting `0-9`,`#`, and `*`.
 
 To be able to run the program you need to determine the following
-parameters
+parameters:
 
-        carrier_freq     - base frequency used to host music
+```
-        pixelclock       - refresh rate of the monitor
+    carrier_freq     - base frequency used to host music
-        horizontal_total - total scan along the horizontal axis
+    pixelclock       - refresh rate of the monitor
+    horizontal_total - total scan along the horizontal axis
+```
 
-If you have xvidtune installed you can get the pixelclock and
+If you have `xvidtune` installed you can get the `pixelclock` and
-horizontal total with the following command
+`horizontal_total` with the following command
 
-        xvidtune -show | head -n 1 |
+```sh
-                awk '{ print "pixelclock " $2 * 1000000 " horizontal_total = " $6 }'
+xvidtune -show | head -n 1 | awk '{ print "pixelclock " $2 * 1000000 " horizontal_total = " $6 }'
+```
 
-example from my laptops
+Example from my laptops:
 
-        ./grothe 65000000 10000000 1344 < twinkle.txt
+```sh
+./grothe 65000000 10000000 1344 < twinkle.txt
+```
 
 Even if the user gets a setting off, the sound will usually be able to be
-heard on AM at a multiple of the original frequency
+heard on [AM](https://en.wikipedia.org/wiki/AM_broadcasting) at a multiple of
+the original frequency.
 
 The core idea of using a machine to play music on AM radio goes all the
-way back to the Altair computers and Timex Sinclair ZX-81s.
+way back to the [Altair computers](https://en.wikipedia.org/wiki/Altair_8800)
+and [Timex Sinclair ZX-81](https://en.wikipedia.org/wiki/ZX81)s.
 
 ### Several example songs
 
-Olympic Fanfare - from antang@phakt.usc.edu - Tony
+Olympic Fanfare - from `antang@phakt.usc.edu` - Tony:
 
+```
         4-9-91231,2222-321123123-9-91231,2222-32112321
+```
 
-Twinkle Twinkle Little Star - from fsufunkyb@aol.com - Ben Schmidt
+Twinkle Twinkle Little Star - from `fsufunkyb@aol.com` - Ben Schmidt:
 
+```
         1199##9-6633221-9966332-9966332-1199#9-6633221-
+```
 
-Generic Arabian Tune - from rdippold@qualcomm.com -Ron "Asbestos" Dippold
+Generic Arabian Tune - from `rdippold@qualcomm.com` - Ron "Asbestos" Dippold:
 
+```
         453,54,4569564459,9#95458,8987453 54
+```
 
 Others can be found by doing a search for "touch tone phone songs".
 
 ### Obfuscations
 
 - Some numbers expressed in Octal, some in hex and some in decimal
-  "A foolish consistency is the hobgoblin of little minds" -
+	"A foolish consistency is the hobgoblin of little minds" - Ralph Waldo
-  Ralph Waldo Emerson
+	Emerson.
-- Funky scoping, looking at the nanosleep section and
+
-  XsetWindowAttributes declares local variables
+- Funky scoping, looking at the nanosleep section and `XsetWindowAttributes`
-- Algorithm is very weird, uses y dimension to draw carrier frequency
+declares local variables.
-  and x dimension to draw audio frequency, based on Erik Thiele's
+- Algorithm is very weird, uses `y` dimension to draw carrier frequency
-  Tempest for Eliza
+  and `x` dimension to draw audio frequency, based on [Erik
-- lack of #defines confuses many people :-)
+  Thiele](http://www.erikyyy.de)'s
-- figuring out your pixelclock and horizontal total and which carrier
+  [Tempest for Eliza](http://www.erikyyy.de/tempest/).
-  frequency to use can be an exercise in obfuscation for the user
+- lack of `#define`s confuses many people :-)
-- use of commas in various places, confuses most c code beautifiers
+- figuring out your `pixelclock` and `horizontal_total` and which `carrier_freq`
+  to use can be an exercise in obfuscation for the user.
+- use of commas in various places, confuses most C code beautifiers
   sometimes making the beautified code harder to read
-- use of static to ensure initilization is EVIL and done in several
+- use of `static` to ensure initialization is EVIL and done in several
   places
-- uses static declarations & voids function returns we don't care about
+- uses `static` declarations & `void` function returns we don't care about
-  making the code harder to read
+  making the code harder to read.
-- does sound using only X11 libs, no other libs required
+- does sound using only [X11 libs](https://en.wikipedia.org/wiki/Xlib), no other
-- demonstrates tempest emissions in a fun/easy way
+libs required.
-- follows good programming practices of actually setting exit codes and
+- demonstrates tempest emissions in a fun/easy way.
-  giving usage when run with incorrect parameters
+- follows good programming practices of actually setting exit codes and giving
+usage when run with incorrect parameters.
 
 ### References
 
-Tempest for Eliza - Basis for Algorithms
+[Tempest for Eliza - Basis for Algorithms](http://www.erikyyy.de/tempest/).
 
-> <http://www.erikyyy.de/tempest/>
+[Tempest
+AM](https://web.archive.org/web/20070612152538if_/http://silcnet.org/priikone/programs/tempest-AM-1.0.tar.gz)
+\- Another early program in this field. See
+[here](https://web.archive.org/web/20070612152538/http://silcnet.org/priikone/programs.php?lang=en)
+for a bit more information on the program (search for `Tempest-AM Radio Signal
+Transmitter`).
 
-Tempest AM - Another early program in this field
+The paper 
+[Soft Tempest: Hidden Data Transmission Using Electromagnetic
+Emanations](https://www.cl.cam.ac.uk/~mgk25/ih98-tempest.pdf) by Markus G.
+Kuhn's and Ross J. Anderson's.
 
-> <http://silcnet.org/priikone/programs.php?lang=en>
-
-Paper by Markus G. Kuhn's and Ross J. Anderson's,
-"Soft Tempest: Hidden Data Transmission Using Electromagnetic Emanations"
-
-> <http://www.cl.cam.ac.uk/~mgk25/ih98-tempest.pdf>
 
 ## Copyright and CC BY-SA 4.0 License: