strangest systems I've sent email from

It was thus said that the Great Mouse once stated: First off, can you supply a list of architectures that are NOT 2's complement integer math that are still made and in active use today? As far as I can tell, there was only one signed-magnitude architecture ever commercially available (and that in the early 60s) and only a few 1's complement architectures from the 60s (possibly up to the early 70s) that *might* still be in active use. Second, are there any architectures still commercially available and used today where an all-zero bit pattern for an address *cannot* be used as NULL? Because it comes across as strange where: char *p = (char *)0; is legal (that is, p will be assigned the NULL address for that platform which may not be all-zero bits) whereas: char *p; memset(&p,0,sizeof(p)); isn't (p is not guarenteed to be a proper NULL pointer) [1]. My wish covers yes, the x86, but also covers the 68k, MIPS, SPARC, PowerPC and ARM. Are there any others I missed? -spc (Also, the only portable exit codes are EXIT_SUCCESS and EXIT_FAILRE [2][3]) [1] I know *why* this happens, but try to explain this to someone who hasn't had *any* exposure to a non-byte, non-2's complement, non-8-32-64bit system. [2] From my understanding, it's DEC that mandated these instead of 0 and 1, because VMS used a different interpretation of exit codes than everybody else ... [3] I only bring this up because you seem to be assuming my position is "all the world's on x86" when it's not (the world is "2's complement byte oriented machines"). And because of this, I checked some of your C code and I noticed you used 0 and 1 as exit codes, which, pedantically speaking, isn't portable. Yes, I'll admit this might be a low blow here ...