In this paper

we report a laboratory DAQ system based on VME bus

for applications in nuclear physics and the detector tests.It uses a commercial ADC card and a single board computer as a crate controller.They are based on the VME bus.The software is based on the ROOT framework.A canvas window is employed for online monitoring

and the acquired data are stored as Histograms in a ROOT file.The data acquisition speed can rea MB/s.A spectrum of 241 Am 59 keV γ-ray collected with a CdZnTe detector is shown to demonstrate the system.