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Date:Mon Oct 10 17:28:08 1993 
Subject:Re: Threaded Interpretive Languages 
From:Penio Penev 
Volume-ID:931010.03 

On 10 Oct 1993 13:14:30 GMT Nathan Stratton (nstn@quercus.gsfc.nasa.gov) wrote:
| Hi, I am a little new to forth I am building a ultrasonic ranger board for
| my robot. To send a ping you need to load a 1 into 768. When the ping is 
| recived it sets bit 1 of 772 high. My question could forth count the delay
| between sending a ping and receiving a ping. How accurately can I measure
| the delay can get get below a ms ????

The answer to this question depends on many things. 
What is your processor?
Do you have an onboard clock? 
Can you use interrupts?
Do you mant to do multitasking, while waiting to receive the ping?

--
Penio Penev  x7423 (212)327-7423 (w) Internet: penev@venezia.rockefeller.edu

Disclaimer: All oppinions are mine.