diff -ub -r -N cc65-2.13.3.orig/asminc/ser-kernel.inc cc65-2.13.3/asminc/ser-kernel.inc
--- cc65-2.13.3.orig/asminc/ser-kernel.inc	2009-12-15 21:38:00.000000000 +0100
+++ cc65-2.13.3/asminc/ser-kernel.inc	2012-12-29 20:05:05.637384137 +0100
@@ -156,6 +156,7 @@
         .global _ser_put
         .global _ser_status
         .global _ser_ioctl
+	.global	_ser_load_driver
 
         .global _ser_clear_ptr
 
diff -ub -r -N cc65-2.13.3.orig/asminc/stdio.inc cc65-2.13.3/asminc/stdio.inc
--- cc65-2.13.3.orig/asminc/stdio.inc	2005-04-19 15:15:52.000000000 +0200
+++ cc65-2.13.3/asminc/stdio.inc	2012-12-29 20:05:05.638384137 +0100
@@ -43,7 +43,7 @@
 EOF 	      	= -1
 .if .defined(__APPLE2__) .or .defined(__APPLE2ENH__)
 FILENAME_MAX	= 64+1
-.elseif .defined(__ATARI__)
+.elseif .defined(__ATARI__) .or .defined(__EC65K__)
 FILENAME_MAX	= 12+1
 .elseif .defined(__LUNIX__)
 FILENAME_MAX    = 80+1
diff -ub -r -N cc65-2.13.3.orig/doc/Makefile cc65-2.13.3/doc/Makefile
--- cc65-2.13.3.orig/doc/Makefile	2010-07-30 21:35:43.000000000 +0200
+++ cc65-2.13.3/doc/Makefile	2012-12-29 20:05:05.638384137 +0100
@@ -50,7 +50,8 @@
 	pet.sgml	\
 	plus4.sgml	\
         supervision.sgml\
-	vic20.sgml
+	vic20.sgml	\
+	ec65k.sgml
 
 TXT  =	$(SGML:.sgml=.txt)
 HTML =	$(SGML:.sgml=.html)
diff -ub -r -N cc65-2.13.3.orig/doc/funcref.sgml cc65-2.13.3/doc/funcref.sgml
--- cc65-2.13.3.orig/doc/funcref.sgml	2012-02-06 22:25:15.000000000 +0100
+++ cc65-2.13.3/doc/funcref.sgml	2012-12-29 20:05:05.641384137 +0100
@@ -212,6 +212,11 @@
 (incomplete)
 
 
+<sect1><tt/ec65k.h/<label id="ec65k.h"><p>
+
+(incomplete)
+
+
 <sect1><tt/em.h/<label id="em.h"><p>
 
 <itemize>
diff -ub -r -N cc65-2.13.3.orig/doc/index.sgml cc65-2.13.3/doc/index.sgml
--- cc65-2.13.3.orig/doc/index.sgml	2010-03-07 13:24:29.000000000 +0100
+++ cc65-2.13.3/doc/index.sgml	2012-12-29 20:05:05.641384137 +0100
@@ -118,6 +118,9 @@
   <tag><htmlurl url="atmos.html" name="atmos.html"></tag>
   Topics specific to the Oric Atmos.
 
+  <tag><htmlurl url="ec65k.html" name="ec65k.html"></tag>
+  Topics specific to the EC-65K.
+
   <tag><htmlurl url="c128.html" name="c128.html"></tag>
   Topics specific to the Commodore 128.
 
diff -ub -r -N cc65-2.13.3.orig/doc/ld65.sgml cc65-2.13.3/doc/ld65.sgml
--- cc65-2.13.3.orig/doc/ld65.sgml	2010-11-18 23:04:40.000000000 +0100
+++ cc65-2.13.3/doc/ld65.sgml	2012-12-29 20:05:05.642384137 +0100
@@ -166,6 +166,7 @@
   <item>cbm510 (CBM-II series with 40 column video)
   <item>cbm610 (all CBM series-II computers with 80 column video)
   <item>pet (all CBM PET systems except the 2001)
+  <item>ec65k (EC-65K with DOS/65)
   <item>geos
   <item>lunix
   <item>nes
diff -ub -r -N cc65-2.13.3.orig/doc/library.sgml cc65-2.13.3/doc/library.sgml
--- cc65-2.13.3.orig/doc/library.sgml	2008-03-26 09:39:36.000000000 +0100
+++ cc65-2.13.3/doc/library.sgml	2012-12-29 20:05:05.642384137 +0100
@@ -165,6 +165,7 @@
   <item>apple2enh
   <item>atari
   <item>atmos
+  <item>EC-65K (with DOS/65)
   <item>c16 (works also for the c116 with up to 32K memory)
   <item>c64
   <item>c128
diff -ub -r -N cc65-2.13.3.orig/include/conio.h cc65-2.13.3/include/conio.h
--- cc65-2.13.3.orig/include/conio.h	2007-08-21 15:16:53.000000000 +0200
+++ cc65-2.13.3/include/conio.h	2012-12-29 20:05:05.643384137 +0100
@@ -77,6 +77,8 @@
 #  include <lynx.h>
 #elif defined(__NES__)
 #  include <nes.h>
+#elif defined(__EC65K__)
+#  include <ec65k.h>
 #endif
 
 
diff -ub -r -N cc65-2.13.3.orig/include/dirent.h cc65-2.13.3/include/dirent.h
--- cc65-2.13.3.orig/include/dirent.h	2012-02-05 19:41:59.000000000 +0100
+++ cc65-2.13.3/include/dirent.h	2012-12-29 20:05:05.643384137 +0100
@@ -79,6 +79,12 @@
     char d_name[13];  /* 8.3 + trailing 0 */
 };
 
+#elif defined(__EC65K__)
+
+struct dirent {
+    char	d_name[13];
+};
+
 #else  /* __APPLE2__ or __APPLE2ENH__ */
 
 struct dirent {
diff -ub -r -N cc65-2.13.3.orig/include/stdio.h cc65-2.13.3/include/stdio.h
--- cc65-2.13.3.orig/include/stdio.h	2009-09-27 14:03:07.000000000 +0200
+++ cc65-2.13.3/include/stdio.h	2012-12-29 20:05:05.644384137 +0100
@@ -71,7 +71,7 @@
 /* Standard defines that are platform dependent */
 #if defined(__APPLE2__) || defined(__APPLE2ENH__)
 #  define FILENAME_MAX	(64+1)
-#elif defined(__ATARI__)
+#elif defined(__ATARI__) || defined(__EC65K__)
 #  define FILENAME_MAX	(12+1)
 #elif defined(__LUNIX__)
 #  define FILENAME_MAX  (80+1)
diff -ub -r -N cc65-2.13.3.orig/include/time.h cc65-2.13.3/include/time.h
--- cc65-2.13.3.orig/include/time.h	2012-02-06 21:20:18.000000000 +0100
+++ cc65-2.13.3/include/time.h	2012-12-29 20:05:05.645384137 +0100
@@ -99,6 +99,9 @@
 #elif  defined(__GEOS__)
 #  define CLK_TCK		1	/* POSIX */
 #  define CLOCKS_PER_SEC	1	/* ANSI */
+#elif  defined(__EC65K__)
+#  define CLK_TCK		64	/* POSIX */
+#  define CLOCKS_PER_SEC	64	/* ANSI */
 #elif defined(__LYNX__)
 /* The clock-rate depends on the video scan-rate;
 ** so, read it at run-time. */
diff -ub -r -N cc65-2.13.3.orig/libsrc/Makefile cc65-2.13.3/libsrc/Makefile
--- cc65-2.13.3.orig/libsrc/Makefile	2009-09-22 23:43:57.000000000 +0200
+++ cc65-2.13.3/libsrc/Makefile	2012-12-29 20:05:05.645384137 +0100
@@ -24,6 +24,7 @@
        	       	cbm610 		\
        	       	geos   		\
 		lynx		\
+		ec65k		\
                 nes     	\
        	       	pet    		\
        	       	plus4   	\
@@ -39,6 +40,18 @@
 	done
 
 #-----------------------------------------------------------------------------
+# EC-65K
+
+ec65klib:
+	for i in ec65k common runtime conio dbg em serial zlib; do \
+	    $(MAKE) SYS=ec65k -C $$i || exit 1; \
+	    $(AR) a ec65k.lib $$i/*.o;\
+	done
+	mv ec65k/crt0.o ec65k.o
+	cp ec65k/*.emd .
+	cp ec65k/*.ser .
+
+#-----------------------------------------------------------------------------
 # Apple ][
 
 apple2lib:
diff -ub -r -N cc65-2.13.3.orig/src/ca65/main.c cc65-2.13.3/src/ca65/main.c
--- cc65-2.13.3.orig/src/ca65/main.c	2009-09-28 22:12:43.000000000 +0200
+++ cc65-2.13.3/src/ca65/main.c	2012-12-29 20:05:05.762384139 +0100
@@ -268,6 +268,10 @@
             NewSymbol ("__LYNX__", 1);
             break;
 
+	case TGT_EC65K:
+	    NewSymbol ("__EC65K__", 1);
+	    break;
+
      	default:
             AbEnd ("Invalid target name: `%s'", Sys);
 
diff -ub -r -N cc65-2.13.3.orig/src/cc65/main.c cc65-2.13.3/src/cc65/main.c
--- cc65-2.13.3.orig/src/cc65/main.c	2009-09-28 22:12:43.000000000 +0200
+++ cc65-2.13.3/src/cc65/main.c	2012-12-29 20:05:05.763384139 +0100
@@ -230,6 +230,10 @@
             DefineNumericMacro ("__LYNX__", 1);
             break;
 
+	case TGT_EC65K:
+	    DefineNumericMacro ("__EC65K__", 1);
+	    break;
+
      	default:
        	    AbEnd ("Unknown target system type %d", Target);
     }
diff -ub -r -N cc65-2.13.3.orig/src/common/target.c cc65-2.13.3/src/common/target.c
--- cc65-2.13.3.orig/src/common/target.c	2009-09-13 13:46:04.000000000 +0200
+++ cc65-2.13.3/src/common/target.c	2012-12-29 20:05:05.763384139 +0100
@@ -71,7 +71,8 @@
     "atmos",
     "nes",
     "supervision",
-    "lynx"
+    "lynx",
+    "ec65k"
 };
 
 
@@ -98,6 +99,7 @@
     CPU_6502,           /* nes */
     CPU_65SC02,         /* supervision */
     CPU_65C02,          /* lynx */
+    CPU_65C02,		/* ec65k */
 };
 
 
diff -ub -r -N cc65-2.13.3.orig/src/common/target.h cc65-2.13.3/src/common/target.h
--- cc65-2.13.3.orig/src/common/target.h	2009-09-13 13:46:04.000000000 +0200
+++ cc65-2.13.3/src/common/target.h	2012-12-29 20:05:05.764384139 +0100
@@ -72,6 +72,7 @@
     TGT_NES,
     TGT_SUPERVISION,
     TGT_LYNX,
+    TGT_EC65K,
     TGT_COUNT			/* Number of target systems */
 } target_t;
 
diff -ub -r -N cc65-2.13.3.orig/src/common/tgttrans.c cc65-2.13.3/src/common/tgttrans.c
--- cc65-2.13.3.orig/src/common/tgttrans.c	2009-09-13 13:46:04.000000000 +0200
+++ cc65-2.13.3/src/common/tgttrans.c	2012-12-29 20:05:05.764384139 +0100
@@ -161,6 +161,7 @@
        	case TGT_NES:		memcpy (Tab, CTNone, sizeof (Tab));  	break;
         case TGT_SUPERVISION:   memcpy (Tab, CTNone, sizeof (Tab));     break;
         case TGT_LYNX:          memcpy (Tab, CTNone, sizeof (Tab));     break;
+	case TGT_EC65K:         memcpy (Tab, CTNone, sizeof (Tab));     break;
 	default:
 	    AbEnd ("Internal error: Target system unknown (%d)", Target);
     }
diff -ub -r -N cc65-2.13.3.orig/src/ld65/make/gcc.mak cc65-2.13.3/src/ld65/make/gcc.mak
--- cc65-2.13.3.orig/src/ld65/make/gcc.mak	2010-11-07 12:36:26.000000000 +0100
+++ cc65-2.13.3/src/ld65/make/gcc.mak	2012-12-29 20:05:05.814384140 +0100
@@ -81,7 +81,8 @@
 	pet.inc		\
 	plus4.inc	\
 	supervision.inc \
-	vic20.inc
+       vic20.inc       \
+       ec65k.inc
 
 LIBS = $(COMMON)/common.a
 
@@ -182,4 +183,6 @@
 vic20.inc:     	cfg/vic20.cfg
 	@$(CVT) $< $@ CfgVic20
 
+ec65k.inc:	cfg/ec65k.cfg
+	@$(CVT) $< $@ CfgEc65k
 
diff -ub -r -N cc65-2.13.3.orig/src/ld65/tgtcfg.c cc65-2.13.3/src/ld65/tgtcfg.c
--- cc65-2.13.3.orig/src/ld65/tgtcfg.c	2009-09-18 21:13:59.000000000 +0200
+++ cc65-2.13.3/src/ld65/tgtcfg.c	2012-12-29 20:05:05.815384140 +0100
@@ -69,6 +69,7 @@
 #include "plus4.inc"
 #include "supervision.inc"
 #include "vic20.inc"
+#include "ec65k.inc"
 
 
 
@@ -100,6 +101,7 @@
     {  	BINFMT_BINARY, 	CfgNES          },
     {  	BINFMT_BINARY, 	CfgSupervision  },
     {  	BINFMT_BINARY,	CfgLynx         },
+    {	BINFMT_BINARY,  CfgEc65k	},
 };