I set breackpoints through the windows interface. Through the serial line, we had the same thing. I mean the "CONTINUE" command doesn't work. Only the NEXTI and JUMP *0x60000 commands allow to run our aplication and stoped at the breackpoint. Here is the card's Mapping : RedBoot> version RedBoot(tm) bootstrap and debug environment [ROMRAM] Non-certified release, version v2_00_lpz - built 12:13:16, Jun 1 2004 Platform: Fydji (PowerPC MPC8270) Copyright (C) 2000, 2001, 2002, Red Hat, Inc. RAM: 0x00000000-0x04000000, [0x0003c580-0x03fdd000] available FLASH: 0xff800000 - 0x00000000, 64 blocks of 0x00020000 bytes each. RedBoot> Thanks, Emmanuel Coullien Laurent GONZALEZ le 01/06/2004 15:46:29 Pour ecos-discuss@ecos.sourceware.org : cc : (ccc : Emmanuel COULLIEN/Faiveley) Objet Re: [ECOS] GDB Initialisation problem :