diff -r 7b722739e329 -r 8675c3e5d914 me8100_test_dio/wtest.c
--- a/me8100_test_dio/wtest.c	Fri Jan 25 16:55:00 2002 +0100
+++ b/me8100_test_dio/wtest.c	Fri Jan 25 20:26:01 2002 +0100
@@ -21,6 +21,7 @@
 #include <sys/ioctl.h>
 #include <signal.h>
 #include <stdlib.h>
+#include <string.h>
 #include "me8100.h"
 
 #define USE_WRITE
@@ -28,19 +29,16 @@
 const char* DEVICE = "/dev/me8100_0a";
 
 int main(int argc, char** argv) {
-  int err = 0;
-  static int file_handle = -1;
-
-#ifndef USE_WRITE
-  unsigned short ctrl_a;
-#endif
-  unsigned short value_a;
+  char dev = 0;
+  static int file_handle;
+  unsigned short value;
 
   if (argc > 1) DEVICE = argv[1];
+  dev = DEVICE[strlen(DEVICE) - 1];
+
   printf("Write test, to %s PID: %d\n", DEVICE, getpid());
-#ifdef USE_WRITE
   printf("Using write()\n");
-#endif
+
 
 
   if (-1 == (file_handle = open(DEVICE, O_WRONLY, 0))) {
@@ -48,33 +46,19 @@
     exit(EXIT_FAILURE);
   }
 
-#ifndef USE_WRITE
-  ctrl_a = ME8100_CTRL_ENIO | ME8100_CTRL_SOURCE | ME8100_CTRL_IRQ_MASK;
-  err = ioctl(file_handle, ME8100_WRITE_CTRL_A, &ctrl_a);
-  if (err) {
-    fprintf(stderr, "Can't setup output to port A\n");
-    return 1;
-  }
-#endif
+  for (value = 0x00;;++value) {
+    int val;
+    if (value > 0xff) value = 0;
 
-  value_a = 0xffff;
-  write(file_handle, &value_a, sizeof(value_a));
-  exit(EXIT_SUCCESS);
-
-  for (value_a = 0x01; value_a < 0xffff; ++value_a) {
-#ifdef USE_WRITE
-    write(file_handle, &value_a, sizeof(value_a));
-#else
-    ioctl(file_handle, ME8100_WRITE_DO_A, &value_a);
-#endif
-    printf("Wrote %04x\n", value_a);
+    val = value + (dev << 8);;
+    write(file_handle, &val, sizeof(val));
+    printf("Wrote %04x\n", val);
     sleep(1);
   }
 
-  err = close(file_handle);
-  if(err){
-    printf("Kann Pfad nicht schliessen\n");
-    return 1;
+  if(-1 == close(file_handle)) {
+    perror("Can't close file");
+    exit(EXIT_FAILURE);
   }
 
   return 0;