--- avr910.c.old	2003-05-16 19:59:28.000000000 +0200
+++ avr910.c	2003-05-16 20:35:47.000000000 +0200
@@ -324,13 +324,26 @@
 static int avr910_cmd(PROGRAMMER * pgm, unsigned char cmd[4], 
                       unsigned char res[4])
 {
+  static unsigned char last_spi_byte = 0xff;
+  unsigned char buf[5];
   int i;
 
   no_show_func_info();
 
-  for (i=0; i<4; i++) {
-    fprintf(stderr, "cmd[%d] = 0x%02x\n", i, cmd[i]);
-  }
+  buf[0] = '.';                 /* New Universal Command */
+  buf[1] = cmd[0];
+  buf[2] = cmd[1];
+  buf[3] = cmd[2];
+  buf[4] = cmd[3];
+
+  avr910_send (pgm, buf, 5);
+  avr910_recv (pgm, buf, 2);
+
+  res[0] = last_spi_byte;
+  res[1] = cmd[0];
+  res[2] = cmd[1];
+  res[3] = buf[0];
+  last_spi_byte = cmd[3];
 
   return 0;
 }
@@ -416,7 +429,7 @@
     cmd[0] = 'D';
   }
   else {
-    return -1;
+    return avr_write_byte_default(pgm, p, m, addr, value);
   }
 
   cmd[1] = value;
@@ -490,7 +503,7 @@
     return avr910_read_byte_eeprom(pgm, p, m, addr, value);
   }
 
-  return -1;
+  return avr_read_byte_default(pgm, p, m, addr, value);
 }