 
 No ramp is seen on DB9F X4-3.  There is no continuity between IC3 pin 8 and X4-3.
 
-Only after it looks good, do we attach the DB15 cable to drive the motor.
+We attached the DB15 cable and drove the motor from PCB #1
+
+The DB-25 connector from Cruise supplies the wheel revolution click.  Since PCB #1 and #2 have
+reversed genders, the present wiring only plugs into PCB #2. When PCB #2 is used, there is no
+signal on IC2 pin 8.
    
 */
- // go through the four channels of the digital analog converter:
-  for (int channel = 0; channel < 4; channel++)
+ // Only use motor control:
+  int channel = 0;
   { 
+      /* Observed behavior with manual throttle, no load (May 10, 2013, TCF)
+      0.831 V at rest       52 counts
+      1.20 V: nothing       75
+      1.27 V: just starting 79
+      1.40 V: slow, steady  87
+      1.50 V: brisker       94
+      3.63 V: max          227 counts
+      
+      255 counts = 4.08 V
+      
+      */
       // change the voltage on this channel from min to max:
-      for (int level = 0; level < 255; level++) 
+      for (int level = 70; level < 200; level+=4) 
       {
         DAC_Write(channel, level);
-        delay(100);
+        Serial.print(SpeedCyclometer_degPs); Serial.print(", ");
+        Serial.println(level);
+        delay(3000);
       }
       // wait a second at the top:
       delay(1000);
       // change the voltage on this channel from max to min:
-      for (int level = 0; level < 255; level++) 
+      for (int level = 200; level > 70; level-=4) 
       {
-        DAC_Write(channel, 255 - level);
-        delay(100);
+        DAC_Write(channel, level);
+        Serial.print(SpeedCyclometer_degPs); Serial.print(", ");
+        Serial.println(level);
+        delay(3000);
       }
  }    
 

    SpeedCyclometer_degPs = (360 * MEG) / WheelRevMicros;
    OldTick = TickTime;
}
*/
/*---------------------------------------------------------------------------------------*/
void loop()
{


// inslude the SPI library:
#include <SPI.h>

#define MEG 1000000

volatile long SpeedCyclometer_degPs;

/*---------------------------------------------------------------------------------------*/
void setup()
{
