try this:

ResetPulse
  ReadStatusRegister
ResetPulse
  WriteStatusRegister ( RSR and $fa [1Shot, T/R* = 0])
  wait for NVB
ResetPulse
  StartConvert T

:loop
ResetPulse
  ReadTemperature


HanusKK

At 15:41 30.3.1998 -0800, you wrote:
>Greetings,
>        I am trying to use the Dallas Semiconductor DS1821 as
>a digital thermometer.  I am able to generate the Reset Pulse
>and get the Presence Pulse back; I read the Status Register,
>ensuring that the unit is not in 1SHOT mode or in Thermostat
>mode.  If either of these 2 bits are in the wrong state, I
>do a Write Status to get them into the right state, and wait
>for NVB to indicate not busy.  Then I send the Start Convert T
>command, but I never get a DONE signal, and everytime I Read
>Temperature, I get a result of 0 degrees.  Any ideas what I
>am doing wrong?
>
>Thanks in advance for the help.
>
>Dave Reinagel
>Auspex Systems, Inc.
>dave.reinagel@corp.auspex.com
>