Hi Tobias, D. Taits soft usually works. However you are not the first one saying he cant get it working. Try to slow down your PC both the CPU clock and BUS speed, don run D. Tait software in a Windows DOS box! there are no good ways (yet) to merge the two files together you may save a dummy file with PICSER, take a text editor copy paste and fixup up the start addresses. Or you could write the chip once without CP with taits software and then readback with PICSER, ok taits software doesnt run on _your_ PC, use the neighbours. I just uploaded DISASM like stuff to /pub/sis/prod/microchip/disasm/ nothing very good but something useable amongst. look yourself, have fun I have DISASM84 written myself but very early stage. well works. not uploaded anywhere antti ---------------------------------------------------------- -- Antti Lukats Silicon Studio -- -- sis@rasi.lr.ttu.ee PO Box 3500 -- -- ftp://rasi.lr.ttu.ee/pub/sis Tallinn EE0001 -- -- http://rasi.lr.ttu.ee/~sis Estonia -- ----------------------------------------------------------