Initial class construction

Git/usr/share/vim/vim81/macros/urm/README.txt

@@ -0,0 +1,47 @@
+This is another proof that Vim is perfectly compatible with Vi.
+The URM macro package was written by Rudolf Koenig ("Rudi")
+(rudolf@koeniglich.de) for hpux-vi in August 1991.
+
+Getting started:
+
+type
+in your shell:	 vim urm<RETURN>
+in vim:		 :so urm.vim<RETURN>
+in vim:		 *	(to load the registers and boot the URM-machine :-)
+in vim:		 g	(for 'go') and watch the fun. Per default, 3 and 4
+			are multiplied. Watch the Program counter, it is
+			visible as a komma moving around.
+
+This is a "standard URM" (Universal register machine)  interpreter. The URM
+concept is used in theoretical computer science to aid in theorem proving.
+Here it proves that vim is a general problem solver (if you bring enough
+patience).
+
+The interpreter begins with register 1 (not 0), without macros and more-lines
+capability.  A dot marks the end of a program. (Bug: there must be a space
+after the dot.)
+
+The registers are the first few lines, beginning with a '>' .
+The program is the first line after the registers.
+You should always initialize the registers required by the program.
+
+Output register:	line 2
+Input registers:	line 2 to ...
+
+Commands:
+a<n>		increment register <n>
+s<n>		decrement register <n>
+<x>;<y>		execute command <x> and then <y>
+(<x>)<n>	execute command <x> while register <n> is nonzero
+. 		("dot blank")  halt the machine.
+
+Examples:
+
+Add register 2 to register 3:
+	(a2;s3)3.
+Multiply register 2 with register 3:
+	(a4;a5;s2)2; ((a2;s4)4; s3; (a1;a4;s5)5; (a5;s1)1)3.
+
+There are more (complicated) examples in the file examples.
+Note, undo may take a while after a division.
+

Git/usr/share/vim/vim81/macros/urm/examples

@@ -0,0 +1,16 @@
+Note that enough temporary registers should be provided for each example.
+All should be initialised to 0.
+
+Initial register values for benchmarking: 0,8,3,0,...
+
+Performed on a Xenix 386/16:
+Operation [sec, kbyte tmp space]: program
+
+Asym. Diff.[ 7, 4]: (s2;s3)3. 
+Abs. Diff. [90,81]: (a1;a4;s2)2; (a2;s1)1; (a1;a5;s3)3; (a3;s1)1; (s2;s3)3; (s5;s4)4; (a2;s5)5. 
+Add  [  7,   4]: (a2;s3)3. 
+Mult [227, 161]: (a4;a5;s2)2; ((a2;s4)4; s3; (a1;a4;s5)5; (a5;s1)1)3. 
+Copy [ 48,  25]: (a1;a3;s2)2; (a2;s1)1. 
+sign [ 30,  17]: (a3;s2)2; (a2;(s3)3)3. 
+!sign[ 36,  28]: (a3;s2)2; (a2;(s3)3)3; a3; (s3;s2)2; (s3;a2)3.  
+Div  [630,1522]: (a9;s2)2; (a2;a10;s3)3; (a3;s2)2; (a2;(s3)3)3; a3; (s3;s2)2; (s3;a2)3; (a2)2;(a2;s9)9;(a3;s10)10; (a9;a10;s2)2; (a11;a12;s3)3; (a2;s12)12; (a3;s9)9; (s2;s3)3; (a3;s2)2; (a2;(s3)3)3; a3; (s3;s2)2; (s3;a2)3; (a1;s2)2; (a2;s10)10; (a3;s11)11; ((a12;a13;s3)3; (a3;s13)13; (s2;s3)3; (a3;s12)12; a14; (s1)1; (a9;a10;s2)2; (a11;a12;s3)3; (a2;s12)12; (a3;s9)9; (s2;s3)3; (a3;s2)2; (a2;(s3)3)3; a3; (s3;s2)2; (s3;a2)3; (a1;s2)2; (a2;s10)10; (a3;s11)11)1; (s2)2; (a2;s14)14. 

Git/usr/share/vim/vim81/macros/urm/urm

@@ -0,0 +1,22 @@
+>0
+>3
+>4
+>0
+>0
+>0
+(a4;a5;s2)2; ((a2;s4)4; s3; (a1;a4;s5)5; (a5;s1)1)3. 
+_________
+O	; =xp ( =x%hp ) @l a @db s @dt . =x0xkdd:ready _end_
+o	0 1 2 3 4 5 6 7 8 9 0
+_________
+INIT main(k), l, b, c, t, u, q, d 
+
+"kT
+"lT
+"bT
+"cT
+"tT
+"uT
+"qT
+"dT
+=lF'wa/O

Git/usr/share/vim/vim81/macros/urm/urm.vim

@@ -0,0 +1,5 @@
+map * 1G/INIT
+j"iT@i1G/INIT
+dG
+map g 1G/^[(as;.]
+i