I have C51 v5.5 installed on notebook and WIN-ME. Compiler works without any problems since yesterday. When I write C51.EXE in command line nothing happend. example: C:\>C51.EXE <cr> C:\> Cursor jump to next line, thats all. In safe mode compiler works ok, but I cant acces serial port. Ts51 and DS51 works without any problem in normal and in safe mode. I reinstall compiler but it didnt help.
The problem will be with the command-processor CMD.com or command.com. Reinstall your windows. This is a known problem. Kindly regaards Dirk Walgenbach european controm for mechatronics http://www.aps-mechatronik.de dirk-walgenbach@freenet.de walgenbach@aps-mechatronik.de