diff -wu ./des.c g:\des3/des.c
--- ./des.c	Fri Oct  8 02:35:08 1993
+++ g:\des3/des.c	Mon Nov  8 16:55:16 1993
@@ -44,6 +44,13 @@
 #define EXIT(a) exit(a)
 #endif
 
+#ifdef atarist
+#include <stdlib.h>
+#include <lib.h> /* __open_stat, __OPEN_INDEX() */
+#include <ioctl.h> /* RAW, CRMOD, ECHO */
+long  _stksize = 32 * 1024;
+#endif
+
 #define BUFSIZE (8*1024)
 #define VERIFY  1
 #define KEYSIZ	8
@@ -72,6 +79,11 @@
 	struct stat ins,outs;
 	char *p;
 
+#ifdef atarist
+	__open_stat[__OPEN_INDEX(fileno(stdout))].flags = ECHO|CRMOD|RAW;
+	__open_stat[__OPEN_INDEX(fileno(stderr))].flags = ECHO|CRMOD|RAW;
+#endif
+
 	cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0,error=0;
 	bzero(key,sizeof(key));
 
@@ -185,12 +197,12 @@
 
 	if (	(in != NULL) &&
 		(out != NULL) &&
-#ifndef MSDOS
+#if !(defined(MSDOS) || defined(atarist))
 		(stat(in,&ins) != -1) &&
 		(stat(out,&outs) != -1) &&
 		(ins.st_dev == outs.st_dev) &&
 		(ins.st_ino == outs.st_ino))
-#else /* MSDOS */
+#else /* MSDOS, atarist */
 		(strcmp(in,out) == 0))
 #endif
 			{
@@ -235,6 +247,12 @@
 		setmode(fileno(DES_OUT),O_BINARY);
 	}
 #endif
+#ifdef atarist
+	if (!(uflag && dflag))
+		DES_IN->_flag  |= _IOBIN;
+	if (!(uflag && eflag))
+		DES_OUT->_flag |= _IOBIN;
+#endif
 
 	doencryption();
 	fclose(DES_IN);
diff -wu ./enc_read.c g:\des3/enc_read.c
--- ./enc_read.c	Thu Oct  7 06:38:38 1993
+++ g:\des3/enc_read.c	Mon Nov  8 16:10:22 1993
@@ -1,7 +1,13 @@
 /* enc_read.c */
 /* Copyright (C) 1993 Eric Young - see README for more details */
+
+/* !! takes more than 32kB of stacksize */
+
 #include <errno.h>
 #include "des_locl.h"
+#ifdef atarist
+#include <unistd.h>
+#endif
 
 /* This has some uglies in it but it works - even over sockets. */
 extern int errno;
@@ -139,4 +145,3 @@
 		}
 	return(num);
 	}
-
diff -wu ./enc_writ.c g:\des3/enc_writ.c
--- ./enc_writ.c	Thu Oct  7 06:37:02 1993
+++ g:\des3/enc_writ.c	Mon Nov  8 16:56:20 1993
@@ -1,7 +1,14 @@
 /* enc_writ.c */
 /* Copyright (C) 1993 Eric Young - see README for more details */
+
+/* !! takes more than 16kB of stacksize */
+
 #include <errno.h>
 #include "des_locl.h"
+#ifdef atarist
+#include <unistd.h>
+#include <time.h>
+#endif
 
 int des_enc_write(fd,buf,len,sched,iv)
 int fd;
diff -wu ./rand_key.c g:\des3/rand_key.c
--- ./rand_key.c	Thu Oct  7 06:37:26 1993
+++ g:\des3/rand_key.c	Mon Nov  8 16:55:58 1993
@@ -1,6 +1,10 @@
 /* rand_key.c */
 /* Copyright (C) 1993 Eric Young - see README for more details */
 #include "des_locl.h"
+#ifdef atarist
+#include <unistd.h>
+#include <time.h>
+#endif
 
 int des_random_key(ret)
 des_cblock ret;
diff -wu ./read_pwd.c g:\des3/read_pwd.c
--- ./read_pwd.c	Thu Oct  7 06:37:30 1993
+++ g:\des3/read_pwd.c	Mon Nov  8 15:50:22 1993
@@ -45,7 +45,11 @@
 #endif
 
 static void read_till_nl();
+#ifdef __STDC__
+static int read_pw(char *buf,char *buff,int size,char *prompt,int verify);
+#else
 static int read_pw();
+#endif
 static void recsig();
 static void pushsig();
 static void popsig();
diff -wu ./speed.c g:\des3/speed.c
--- ./speed.c	Thu Oct  7 06:33:06 1993
+++ g:\des3/speed.c	Mon Nov  8 15:51:18 1993
@@ -44,6 +44,9 @@
 
 #define BUFSIZE	((long)1024*8)
 long run=0;
+#ifdef atarist
+	long _stksize = 16 * 1024;
+#endif
 
 #ifdef SIGALRM
 #ifdef __STDC__