Having hunted through the code it would appear that the f877 _is_ supported in gpasm. I have tried to compile gpasm using CygWin 1.1.0 ./configure seems to work ok: ------- bash-2.04$ ./configure loading cache ./config.cache checking for gcc... (cached) gcc checking whether the C compiler (gcc ) works... yes checking whether the C compiler (gcc ) is a cross-compiler... no checking whether we are using GNU C... (cached) yes checking whether gcc accepts -g... (cached) yes checking for bison... (cached) bison -y checking for flex... (cached) flex checking for yywrap in -lfl... (cached) yes checking for a BSD compatible install... (cached) /usr/bin/install -c checking for main in -lfl... (cached) yes checking how to run the C preprocessor... (cached) gcc -E checking for ANSI C header files... (cached) yes checking for malloc.h... (cached) yes checking for unistd.h... (cached) yes checking for string.h... (cached) yes checking for strings.h... (cached) yes checking for working const... (cached) yes checking whether struct tm is in sys/time.h or time.h... (cached) time.h checking for working alloca.h... (cached) no checking for alloca... (cached) yes checking for strdup... (cached) yes checking for strtol... (cached) yes checking for strcasecmp... (cached) yes checking for stricmp... (cached) no updating cache ./config.cache creating ./config.status creating doc/Makefile creating Makefile creating config.h bash-2.04$ ------- make however falls over with a few hundred errors: ------- bash-2.04$ make bison -y -d gpasm.y ("gpasm.y", line 95) error: unknown character: \15 ("gpasm.y", line 95) error: Skipping to next % ("gpasm.y", line 103) error: unknown character: \15 ("gpasm.y", line 103) error: Skipping to next % ' is invalid in %tokenerror: ` ("gpasm.y", line 105) error: Skipping to next % ' is invalid in %tokenerror: ` -------and so on----- any ideas what's going on here ? Thanks, Simon -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics