The Qume DT8 I have has only the HL line cut on the programmable shunt block at 1E. This doesn't match any configuration shown in the usage or service manual. Also, it has the SS trace (between U3E and U3D) cut. This trace is not explained anywhere in the user or service manual except that it is shown to exist. The schematic at the end of the latest rev manual at bitsavers shows that it has something to do with whether head 0 or head 1 is selected (or perhaps loaded) in regards to the READY and INDEX signals on the shugart interface. Does anyone know exactly what it is supposed to do? I got lost in all the logic. Thanks, -- Jonathan Gevaryahu jgevaryahu(@t)hotmail(d0t)com jzg22(@t)drexel(d0t)edu