The following is against the standard dvi2tty distribution, but don't forget
to apply 'dvi2tty-latin1.patch' too.
Purpose of this patch is to output some latin1 characters (mainly german
umlauts and sz-ligature) when the '-s' command line option is used.
NOTE: '-s' differs completely from the original behaviour!
      instead of using some DOS codepage characters, Latin-1 characters are
      used where possible.

To apply these patches, use:

	patch < dvi2tty-german_umlauts.patch

Thomas Sefzick
t.sefzick@fz-juelich.de

--- dvistuff.c.orig	Wed Nov 29 18:05:40 2000
+++ dvistuff.c	Wed Nov 29 18:08:52 2000
@@ -806,18 +806,30 @@
                                   ch = 'l'; break;  /* ligature        */
         case 16  :  ch = 'i'; break;
         case 17  :  ch = 'j'; break;
-        case 25  :  outchar('s'); ch = 's'; break;  /* German double s */
-        case 26  :  outchar('a'); ch = 'e'; break;  /* Dane/Norw ae    */
+        case 25  :  if (scascii)                    /* German sz ligature */
+                        ch = 0xdf;
+                    else
+                        {outchar('s'); ch = 's';}
+                    break;
+        case 26  :  if (scascii)                    /* Dane/Norw ae    */
+                        ch = 0xe6;
+                    else
+                        {outchar('a'); ch = 'e';}
+                    break;
         case 27  :  outchar('o'); ch = 'e'; break;  /* Dane/Norw oe    */
-        case 28  :  if (scascii)
-                        ch = '|';                   /* Dane/Norw /o    */
+        case 28  :  if (scascii)                    /* Dane/Norw /o    */
+                        ch = 0xf8;
                     else
                         ch = 'o';
                     break;
-        case 29  :  outchar('A'); ch = 'E'; break;  /* Dane/Norw AE    */
+        case 29  :  if (scascii)                    /* Dane/Norw AE    */
+                        ch = 0xc6;
+                    else
+                        {outchar('A'); ch = 'E';}
+                    break;
         case 30  :  outchar('O'); ch = 'E'; break;  /* Dane/Norw OE    */
         case 31  :  if (scascii)
-                        ch = '\\';                  /* Dane/Norw /O    */
+                        ch = 0xd8;                  /* Dane/Norw /O    */
                     else
                         ch = 'O';
                     break;
@@ -872,18 +884,18 @@
     /* This code does not really belong here ...
     /*
     /*-------------------------------------------------------------*/
-    /* The following is very specialized code, it handles national */
-    /* Swe/Fin characters. They are respectively: a and o with two */
-    /* dots ("a & "o) and a with a circle (Oa). In Swe/Fin "ASCII" */
-    /* these characters replace }{|][ and \.  TeX outputs these by */
+    /* The following is very specialized code, it handles some eu- */
+    /* ropean characters.  These are: a, o, u with two dots ("a &  */
+    /* "o & "u), and a with a circle (Oa).  TeX outputs these by   */
     /* first issuing the dots or circle and then backspace and set */
-    /* the a or o.  When dvitty finds an a or o it searches in the */
-    /* near vicinity for the character codes that represent circle */
-    /* or dots and if one is found the corresponding national char */
-    /* replaces the special character codes.                       */
+    /* the a, o, or u.  When dvitty finds an a, o, or u it sear-   */
+    /* ches in the near vicinity for the character codes that re-  */
+    /* present circle or dots and if one is found the correspon-   */
+    /* ding Latin-1 character replaces the special character code. */
     /*-------------------------------------------------------------*/
     if (scascii) {
-        if ((ch == 'a') || (ch == 'A') || (ch == 'o') || (ch == 'O')) {
+        if ((ch == 'a') || (ch == 'A') || (ch == 'o') || (ch == 'O') ||
+		      (ch == 'u') || (ch == 'U')) {
             for (i = IMAX(leftmargin, j-2);
                  i <= IMIN(rightmargin, j+2);
                  i++)
@@ -896,18 +908,22 @@
                 switch (currentline->text[j - leftmargin]) {
                     case 127 : case 34:
                                if (ch == 'a')
-                                   ch = '{';
+                                   ch = 0xe4;
                                else if (ch == 'A')      /* dots ... */
-                                   ch = '[';
+                                   ch = 0xc4;
                                else if (ch == 'o')
-                                   ch = '|';
+                                   ch = 0xf6;
                                else if (ch == 'O')
-                                   ch = '\\';
+                                   ch = 0xd6;
+                               else if (ch == 'u')
+                                   ch = 0xfc;
+                               else if (ch == 'U')
+                                   ch = 0xdc;
                                break;
                     case 23  : if (ch == 'a')
-                                   ch = '}';
+                                   ch = 0xe5;
                                else if (ch == 'A')      /* circle */
-                                   ch = ']';
+                                   ch = 0xc5;
                                break;
                 }
             }