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\large
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\centerline {\bf 2.4\_V2.0 Software Boot Modes: Warm \& Cold } 
\vspace{0.25in}

\normalsize
\noindent{\it Last Revised: June 27,1999}\\
\noindent{\bf Filename: swbootmode}\\


\noindent {\bf BRIEF FUNCTIONAL DESCRIPTION:} \\
\normalsize
ACIS flight software can be booted in either cold or warm.  The cold
boot means that ACIS will be booted from EEPROM; and, the warm boot
reloads the flight code, applys patches and bad pixel/column lists, and
cleans up memory buffers.

\vspace{0.25in}
\noindent The sequence of actions will be: 
\be
\item reconfigure to turn off and disable both DPAs
\vspace{-0.10in}
\item cold BEP A, load standard patches, warm boot BEP A, cold boot
BEP A
\vspace{-0.10in}
\item warm BEP B, load standard patches, warm boot BEP B, cold boot
BEP B
\vspace{-0.10in}
\item switch back to BEP A
\ee


\vspace{0.15in}
\normalsize
\noindent {\bf ASSUMED INSTRUMENT STATE:} \\
\normalsize
Assumes DPA A \& B and DEA A are on. \\
Assumes instrument starts out in thermal standby state and will return
instrument to that state.\\

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\normalsize
\noindent {\bf SPECIAL INITIAL CONDITIONS:} \\
\normalsize
Spacecraft telemetry Format must be 1 or 2.

%\vspace{0.25in}
\normalsize
\noindent {\bf OPERATIONAL CONSTRAINTS/CAUTIONS:} \\
\normalsize
Patches are deleted in both BEPs by this procedure.\\

\vspace{0.15in}
\normalsize
\noindent {\bf REFERENCES:} \\
\normalsize
\noindent ACIS Long Form Functional Test Procedure (36-01301.01) \\
\noindent ACIS Short Form Functional Test Procedure (36-01301.02) \\
\noindent ACIS Science Instrument SW User's Guide (36-54003) \\

\normalsize
\noindent {\bf CHANGE HISTORY:} \\
\normalsize

{\bf V1.2}
\begin{itemize}
\item deleted commands in step 1 which power down the DEA A
\item deleted commands in step 3 which powered down the DPA B
\item added commands in step 4 to switch back to BEP A and
power up DPA A
\end{itemize}

{\bf V1.3}
\begin{itemize}
\item changed HW TLM verfiers in steps 1.1 and 1.3
\item added new steps 2.3, 2.4, 2.5 to verify BEP A boot
\item added step 2.8 and 2.9 to load the standard patches and sump
them instead of the {\it houseread} patch
\item changed HW TLM verifiers in steo 2.16 to verify that DPA A is
off
\item added new steps 3.7, 3.8, 3.9 to verify BEP B boot
\item added step 3.10 and 3.11 to load the standard patches and sump
them instead of the {\it houseread} patch
\item edited step 4 to Halt the Bep in 4.1, Select BEP A in 4.2,
Enable DPA A in step 4.3 and Turn On DPA A in step 4.4
\item added steps 4.5, 4.6, and 4.7
\end{itemize}

{\bf V1.4}
\begin{itemize}
\item added verifier to check the warmbootFlag = 1 in steps 2.12 and 3.14
\end{itemize}

{\bf V2.0}
\begin{itemize}
\item ACIS Team signed-off version
\item changed expected value of ``1STAT7ST'' in steps 2.4,3.8, and 4.6
\end{itemize}

\newcommand{\tablecaptiontext}{Software Boot Modes: Cold \& Warm}
\input{swbootmode.tab}

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