Recently I asked the forum for a method to read out the code mem of a lpc90x connected for ISP to the mcb900 for I lost the sources from a program of mine by a hd crash. Finally found some time to get the code readout working. If someone's interested, here is the code http://www.baedasui.de/downs/901.zip There are two progs, one for the 901, residing in the 0x300 segment ( sorry, can only program a whole segment, so one of them is lost forever ...) which outputs the content of the lower segs over a idiot-secure clocked serial protocol to the mcb900 and one for the mcb itself which takes the "secrets of the GRAL " and sends it over the serial port to a pc. Of course you have to set the boot vector of the ISPed lpc 901 µC to 0x03 to start the readout. On the PC I saved the output with the capture function of the hyper terminal.