diff --git a/util/ceg/ce_back/as_back/back.h b/util/ceg/ce_back/as_back/back.h
index accbb4a47..973111f3b 100644
--- a/util/ceg/ce_back/as_back/back.h
+++ b/util/ceg/ce_back/as_back/back.h
@@ -1,14 +1,19 @@
 #include <em.h>
 #include <system.h>
 
+#define codefile	_codefile
+#define cur_seg		_cur_seg
+#define saved		_saved
+#define labeltje	_labeltje
+#define name		_name
+#define output_back	_output_back
+
 extern File *codefile;
 
 extern char *extnd_name(), *extnd_dnam(), *extnd_dlb(), *extnd_ilb(),
 	    *extnd_hol(), *extnd_ext(), *extnd_pro(), *extnd_start(),
 	    *extnd_part(), *extnd_cont();
 
-extern int holno, procno;
-
 #define 	swtxt() 	switchseg( SEGTXT)
 
 #define 	SEGTXT		0
diff --git a/util/ceg/ce_back/as_back/bottom.c b/util/ceg/ce_back/as_back/bottom.c
index dfc303340..8b7b54671 100644
--- a/util/ceg/ce_back/as_back/bottom.c
+++ b/util/ceg/ce_back/as_back/bottom.c
@@ -4,7 +4,7 @@
 
 /* This file contains low-level routines for generating assembly code. */
 
-int procno = 0, holno = 0, cur_seg = -1, saved = FALSE;
+int cur_seg = -1, saved = FALSE;
 char name[256], labeltje[256];
 
 File *codefile;
@@ -41,18 +41,18 @@ dump_label()
 }
 
 
-char *extnd_pro( procno)
-int procno;
+char *extnd_pro( prcno)
+int prcno;
 {
-	sprint( name, "pro%d", procno);
+	sprint( name, "pro%d", prcno);
 	return( name);
 }
 
 
-char *extnd_start( procno)
-int procno;
+char *extnd_start( prcno)
+int prcno;
 {
-	sprint( name, "start%d", procno);
+	sprint( name, "start%d", prcno);
 	return( name);
 }
 
@@ -81,10 +81,10 @@ arith g;
 }
 
 
-char *extnd_ilb( l)
+char *extnd_ilb( l, prcno)
 arith l;
 {
-	sprint( name, ILB_FMT, procno, (arith) l);
+	sprint( name, ILB_FMT, prcno, (arith) l);
         return( name);
 }
 
diff --git a/util/ceg/ce_back/as_back/header.h b/util/ceg/ce_back/as_back/header.h
index 640f3f9d9..9f9103efa 100644
--- a/util/ceg/ce_back/as_back/header.h
+++ b/util/ceg/ce_back/as_back/header.h
@@ -3,5 +3,3 @@
 #include "back.h"
 
 extern int cur_seg;
-
-extern holno, procno;
diff --git a/util/ceg/ce_back/obj_back/.distr b/util/ceg/ce_back/obj_back/.distr
index d76935ae0..de62acc3b 100644
--- a/util/ceg/ce_back/obj_back/.distr
+++ b/util/ceg/ce_back/obj_back/.distr
@@ -18,7 +18,6 @@ init_back.c
 label.c
 memory.c
 misc.c
-mysprint.c
 output.c
 reloc1.c
 reloc2.c
diff --git a/util/ceg/ce_back/obj_back/back.h b/util/ceg/ce_back/obj_back/back.h
index 301c5e3f8..7df6c5bff 100644
--- a/util/ceg/ce_back/obj_back/back.h
+++ b/util/ceg/ce_back/obj_back/back.h
@@ -4,15 +4,14 @@
 extern char *extnd_name(), *extnd_dnam(), *extnd_dlb(), *extnd_ilb(),
 	    *extnd_hol(), *extnd_ext(), *extnd_pro(), *extnd_start(),
 	    *extnd_part(), *extnd_cont();
-extern holno, procno;
 
 #include "data.h"
 
 /* These routines are called very often, thus we turned them into macros. */
 
-#define text1(b)	{if (--_text_cnt < 0) mem_text(); *text++ = b;}
-#define con1(b)		{if (--_data_cnt < 0) mem_data(); *data++ = b;}
-#define rom1(b)		{if (--_data_cnt < 0) mem_data(); *data++ = b;}
+#define text1(b)	{if (--text_cnt < 0) mem_text(); *text++ = b;}
+#define con1(b)		{if (--data_cnt < 0) mem_data(); *data++ = b;}
+#define rom1(b)		{if (--data_cnt < 0) mem_data(); *data++ = b;}
 #define bss( n)		( nbss += n)
 
 
@@ -26,7 +25,7 @@ extern holno, procno;
 
 #define swtxt()		switchseg( SEGTXT)
 
-#define switchseg(seg)	if ((seg) != cur_seg) swtchsg(seg); else
+#define switchseg(seg)	if ((seg) != cur_seg) _swtchsg(seg); else
 
 #define 	PC_REL  	1
 #define 	ABSOLUTE 	!PC_REL
diff --git a/util/ceg/ce_back/obj_back/common.c b/util/ceg/ce_back/obj_back/common.c
index d990f85da..59d3bea68 100644
--- a/util/ceg/ce_back/obj_back/common.c
+++ b/util/ceg/ce_back/obj_back/common.c
@@ -5,10 +5,10 @@
 common(n)
 arith n;
 {
-	extern int Label, label_waiting;
-	register struct outname *nm = &symbol_table[Label];
+	extern int _Label, _Label_waiting;
+	register struct outname *nm = &symbol_table[_Label];
 
-	if (label_waiting) {
+	if (_Label_waiting) {
 		/*	If possible, generate a common. Local commons must
 			be delt with later.
 		*/
@@ -16,7 +16,7 @@ arith n;
 		if (n > nm->on_valu) {
 			nm->on_valu = n;
 		}
-		label_waiting = 0;
+		_Label_waiting = 0;
 		return;
 	}
 	switchseg(SEGBSS);
diff --git a/util/ceg/ce_back/obj_back/con2.c b/util/ceg/ce_back/obj_back/con2.c
index 0fd6e6a04..d037ef637 100644
--- a/util/ceg/ce_back/obj_back/con2.c
+++ b/util/ceg/ce_back/obj_back/con2.c
@@ -4,7 +4,7 @@
 con2( w)
 TWO_BYTES w;
 {
-	if ((_data_cnt -= 2) < 0) mem_data();
+	if ((data_cnt -= 2) < 0) mem_data();
 #ifdef BYTES_REVERSED
 	*data++ = w>>8;
 	*data++ = w;
diff --git a/util/ceg/ce_back/obj_back/con4.c b/util/ceg/ce_back/obj_back/con4.c
index 2027e5e93..a720e4754 100644
--- a/util/ceg/ce_back/obj_back/con4.c
+++ b/util/ceg/ce_back/obj_back/con4.c
@@ -10,7 +10,7 @@
 con4( l)
 FOUR_BYTES l;
 {
-	if ((_data_cnt -= 4) < 0) mem_data();
+	if ((data_cnt -= 4) < 0) mem_data();
 #ifdef WORDS_REVERSED
 	con2( (int)(l>>16));
 	con2( (int) l);
@@ -19,5 +19,3 @@ FOUR_BYTES l;
 	con2( (int) (l>>16));
 #endif
 }
-
-
diff --git a/util/ceg/ce_back/obj_back/data.h b/util/ceg/ce_back/obj_back/data.h
index ee17d90a6..cd9e49e9f 100644
--- a/util/ceg/ce_back/obj_back/data.h
+++ b/util/ceg/ce_back/obj_back/data.h
@@ -1,5 +1,42 @@
 /* The global datastructures (see "data.c"). */
 
+#define cur_value	_cur_value
+#define get4		_get4
+#define cur_seg		_cur_seg
+#define	text		_text
+#define data		_data
+#define string		_string
+#define nname		_nname
+#define nbss		_nbss
+#define size_text	_size_text
+#define size_data	_size_data
+#define size_reloc	_size_reloc
+#define size_symbol	_size_symbol
+#define size_string	_size_string
+#define text_cnt	_text_cnt
+#define data_cnt	_data_cnt
+#define text_area	_text_area
+#define data_area	_data_area
+#define string_area	_string_area
+#define	reloc_info	_reloc_info
+#define relo		_relo
+#define symbol_table	_symbol_table
+#define mem_text	_mem_text
+#define mem_data	_mem_data
+#define mem_relo	_mem_relo
+#define mem_string	_mem_string
+#define mem_symbol_hash	_mem_symbol_hash
+#define put1		_put1
+#define put2		_put2
+#define put4		_put4
+#define get1		_get1
+#define get2		_get2
+#define get4		_get4
+#define do_local_relocation	_do_local_relocation
+#define string_lengte		_string_length
+#define index_symbol_table	_index_symbol_table
+#define output_back	_output_back
+
 extern long 	cur_value();
 extern long	get4();
 
@@ -8,11 +45,11 @@ extern int 	cur_seg;
 extern char 	*text, *data, *string;
 extern int	nname;
 extern long	nbss, size_text, size_data, size_reloc, size_symbol,
-		size_string, _text_cnt, _data_cnt;
+		size_string, text_cnt, data_cnt;
 
 extern char             *text_area, *data_area, *string_area;
 extern struct outrelo	*reloc_info, *relo;
 extern struct outname	*symbol_table;
 
-#define put1(buf, off, w)	((buf)[off] = (w))
-#define get1(buf, off)		((buf)[off])
+#define _put1(buf, off, w)	((buf)[off] = (w))
+#define _get1(buf, off)		((buf)[off])
diff --git a/util/ceg/ce_back/obj_back/end_back.c b/util/ceg/ce_back/obj_back/end_back.c
index 8aafca346..3c5519246 100644
--- a/util/ceg/ce_back/obj_back/end_back.c
+++ b/util/ceg/ce_back/obj_back/end_back.c
@@ -3,14 +3,7 @@
 #include "back.h"
 #include "header.h"
 
-
-end_back()
-{
-	finish_tables();                 
-	do_local_relocation();
-}
-
-
+static
 finish_tables()
 
 /* Prepare tables for do_local_relocation() and output().
@@ -23,7 +16,6 @@ finish_tables()
 	define_segments();  
 }
 
-
 static char *seg_name[] = {
 		".text",
 		".rom",
@@ -31,7 +23,7 @@ static char *seg_name[] = {
 		".bss"
 	};
 
-
+static
 define_segments()
 {
 	int i, s;
@@ -42,3 +34,8 @@ define_segments()
 	}
 }
 
+end_back()
+{
+	finish_tables();                 
+	do_local_relocation();
+}
diff --git a/util/ceg/ce_back/obj_back/extnd.c b/util/ceg/ce_back/obj_back/extnd.c
index f8eeaf0c4..7995d62b1 100644
--- a/util/ceg/ce_back/obj_back/extnd.c
+++ b/util/ceg/ce_back/obj_back/extnd.c
@@ -4,6 +4,32 @@
 #include "header.h"
 #include "data.h"
 #include "mach.h"
+#include <varargs.h>
+
+/* Mysprint() stores the string directly in the string_arae. This saves
+ * a copy action. It is assumed that the strings stored in the string-table
+ * are never longer than MAXSTRLEN bytes.
+ */
+
+#define MAXSTRLEN	1024
+
+/*VARARGS*/
+static int mysprint(va_alist)
+	va_dcl
+{
+	char *fmt;
+	va_list args;
+	int retval;
+
+	va_start(args);
+	fmt = va_arg(args, char *);
+	while (string + MAXSTRLEN - string_area > size_string)
+		mem_string();
+	retval = _format(string, fmt, args);
+	string[retval] = '\0';
+	va_end(args);
+	return retval;
+}
 
 /* The extnd_*()s make a name unique. The resulting string is directly stored
  * in the symbol_table (by mysprint()). Later additional fields in the 
@@ -12,22 +38,21 @@
  */
 
 extern int 	string_lengte, index_symbol_table;
-int 		procno = 0, holno = 0;
 
 
-char *extnd_pro( procno)
-int procno;
+char *extnd_pro( prcno)
+int prcno;
 {
-	string_lengte = mysprint( "%cprc%d", GENLAB, procno);
+	string_lengte = mysprint( "%cprc%d", GENLAB, prcno);
         index_symbol_table = find_sym( string, STORE_STRING);
 	return( symbol_table[ index_symbol_table].on_foff + string_area);
 }
 
 
-char *extnd_start( procno)
-int procno;
+char *extnd_start( prcno)
+int prcno;
 {
-	string_lengte = mysprint( "%cstrt%d", GENLAB, procno);
+	string_lengte = mysprint( "%cstrt%d", GENLAB, prcno);
         index_symbol_table = find_sym( string, STORE_STRING);
 	return( symbol_table[ index_symbol_table].on_foff + string_area);
 }
@@ -60,10 +85,10 @@ arith g;
 }
 
 
-char *extnd_ilb( l)
+char *extnd_ilb( l, prcno)
 arith l;
 {
-	string_lengte = mysprint( ILB_FMT, procno, (arith) l);
+	string_lengte = mysprint( ILB_FMT, prcno, (arith) l);
         index_symbol_table = find_sym( string, STORE_STRING);
 	return( symbol_table[ index_symbol_table].on_foff + string_area);
 }
diff --git a/util/ceg/ce_back/obj_back/hash.h b/util/ceg/ce_back/obj_back/hash.h
index 52b6ff592..17c497450 100644
--- a/util/ceg/ce_back/obj_back/hash.h
+++ b/util/ceg/ce_back/obj_back/hash.h
@@ -3,4 +3,6 @@ struct Hashitem {
 	int hs_nami;
 };
 
+#define Hashitems _HashItems
+
 extern struct Hashitem *Hashitems;
diff --git a/util/ceg/ce_back/obj_back/label.c b/util/ceg/ce_back/obj_back/label.c
index cacf7afe6..379749871 100644
--- a/util/ceg/ce_back/obj_back/label.c
+++ b/util/ceg/ce_back/obj_back/label.c
@@ -2,7 +2,7 @@
 #include "header.h"
 #include "back.h"
 
-int  Label, label_waiting; 
+int  _Label, _Label_waiting; 
 
 save_label( lab)
 char *lab;
@@ -13,18 +13,18 @@ char *lab;
  * is not allowed.
  */
 {
-	Label = find_sym( lab, SYMBOL_DEFINITION);
-	label_waiting = 1;
+	_Label = find_sym( lab, SYMBOL_DEFINITION);
+	_Label_waiting = 1;
 }
 
 
 dump_label()
 {
-	if ( label_waiting) {
+	if ( _Label_waiting) {
 		align_word();
-	        symbol_table[ Label].on_valu = cur_value();
-	        symbol_table[ Label].on_type |= ( S_MIN + conv_seg( cur_seg));
-		label_waiting = 0;
+	        symbol_table[ _Label].on_valu = cur_value();
+	        symbol_table[ _Label].on_type |= ( S_MIN + conv_seg( cur_seg));
+		_Label_waiting = 0;
 	}
 }
 
diff --git a/util/ceg/ce_back/obj_back/output.c b/util/ceg/ce_back/obj_back/output.c
index 16d0ca6a8..28a6b87b6 100644
--- a/util/ceg/ce_back/obj_back/output.c
+++ b/util/ceg/ce_back/obj_back/output.c
@@ -5,6 +5,7 @@
 #include "back.h"
 
 static reduce_name_table();
+static convert_outname();
 
 static int nrelo;
 
@@ -159,10 +160,11 @@ reduce_name_table()
 wr_fatal()
 {
 	fprint( STDERR, "write failed\n");
-	abort();
+	sys_stop(S_ABORT);
 }
 
 
+static
 convert_outname( header)
 struct outhead *header;
 {
diff --git a/util/ceg/ce_back/obj_back/relocation.c b/util/ceg/ce_back/obj_back/relocation.c
index d9ec080ba..0f0c49bc5 100644
--- a/util/ceg/ce_back/obj_back/relocation.c
+++ b/util/ceg/ce_back/obj_back/relocation.c
@@ -71,7 +71,7 @@ do_local_relocation()
 				put1( sect, rp->or_addr, (char) newval);
 			}
 			else
-				print( STDERR, "do_relo() : bad relocation size\n");
+				fprint( STDERR, "do_relo() : bad relocation size\n");
 			rp->or_nami = seg_index((np->on_type & S_TYP) - S_MIN);
 	 		/* print( 
 				"reloc %s adrr=%ld sect=%ld oldval=%ld newval=%ld def = %ld\n",
diff --git a/util/ceg/ce_back/obj_back/switchseg.c b/util/ceg/ce_back/obj_back/switchseg.c
index b7752673e..bb63cdbca 100644
--- a/util/ceg/ce_back/obj_back/switchseg.c
+++ b/util/ceg/ce_back/obj_back/switchseg.c
@@ -1,6 +1,6 @@
 #include "data.h"
 
-swtchsg( seg)
+_swtchsg( seg)
 int seg;
 
  /* The EM definition demands that pseudo instructions are aligned