OK. Now the problem is compiling vesautils: cc -g -Wall -llrmi -o dosint dosint.c dosint.c: In function ?read_edid?: dosint.c:34: warning: implicit declaration of function ?ioperm? dosint.c:35: warning: implicit declaration of function ?iopl? dosint.c: In function ?main?: dosint.c:51: warning: control reaches end of non-void function make: *** No hay ninguna regla para construir el objetivo `mode3.c', necesario para `mode3'. Alto. (translating to English: make: *** There's no rule for building the objective 'mode3.c', needed for 'mode3'. Stop.)