Phillip Musumeci's collection of 68HC11 cross C files

The hc11f1.h include file defines peripheral port addresses etc. Note the meticulous type casting used to ensure that register access is byte--sized (8 bit) or word--sized (16 bit) as required. Acknowledgements are at the start of the file.
The conio.h file supplies serial IO routines int getchar() and void putchar( int ) for console IO via the 68HC11 SCI peripheral. As it requires little extra support, a void puts( char * ) routine for printing strings is also provided.
The ctype.h file supplies char test functions. This source code is actually generated by another C program which ensures that this ctype.h file's functions exactly mimic those available on the host (in this case, a FreeBSD host).
The esp_printf.c file provides printf(). This printf was created by Rud Merriam (Compsult, Inc. Houston, Texas, 1991) and features integer only support.
The stdio.h include file simply includes hc11f1.h, conio.h, and esp_printf.c.
This Makefile is what I use for a general cross compile system running in a web served environment (you probably won't want this file!).

GNU C 2.6.3 or 2.7.2 can be used. It is configured with target=68HC11 and, in the case of my installation, host=FreeBSD. An example of compiling the compiler is available in ftp area ftp://mirriwinni.hn.org/pub/uP/68HC11-cross-compilers --- see files gcc-2.6.3-6811-FreeBSD210R.install-log and gcc-2.6.3-6811-FreeBSD-3.1install-log (most recently, I used GCC 2.6.3);
The run-time library is written in 6811 machine language (based on work by Coactive Aesthetics Ltd. who did the GNU C port) --- you get this when you obtain the patches for GCC from www.coactive.com (an April 1995 copy is available here at ftp://mirriwinni.hn.org/pub/uP/68HC11-cross-compilers/gcc-6811-fsf.tar.gz);
- This Makefile is what I use to compile the run-time code;
- This is my crt0.s run-time code;
- This is a copy of Coactive's crt0.s original run-time code --- they have links into an extensive set of support routines in the ROM of their board.
The peep hole optimiser by Christopher W. Fraser (one of the authors of LCC, a retargetable C compiler system) could also be configured to improve code efficiency. This is my initial set of rules .