The sPHENIX Collaboration at RHIC is upgrading the PHENIX detector in
a way that will enable a comprehensive measurement of jets in
relativistic heavy ion collisions. The upgrade will give the
experiment full azimuthal coverage within a pseudorapidity range of
$-1.1 < \eta < 1.1$.
Since the last conference, we have make significant progress with the
readout of our calorimeters, which work with a ``classic''
triggered-event paradigm. At the same time, we have developed the
prototype readout electronics for the Time Projection Chamber, which
will operate in streaming, or trigger-less, readout mode. Most
likely, another detector, our MAPS-based vertex detector (MVTX), will
be read out in streaming mode as well.
We will present an overview of the DAQ system and the choices and
current status of the readout electronics, firmware, and software
components, especially with the streaming readout of the TPC.