Hi Richard,
Please past the log of startDEV.log, along with that paste dev_disp and dev_w0 logs.
Deepak kori suggested to add the paramter dbms_type = ada in instance profile, make a entry in instance profile ( already there in the start profile).
add an entry for environment variable dbname (http://help.sap.com/saphelp_sm32/helpdata/EN/2b/f8993af7700577e10000000a11402f/content.htm)