gnu (04/01/83)
We at Sun have removed all known occurrances of this "feature" of typical Vax code -- it causes Bus Errors (= core dumps) on the 68000, since page zero is not part of the user's addressable memory. (It belongs to the kernel. This is fixable in hardware by mapping memory with function codes, or by using a 68010 where you can relocate the interrupt pointers.) We've been feeding the changes back to Berkeley, so if nothing falls thru the cracks, the 4.2 distribution will contain few of these bugs. There ARE some advantages to Alpha and Beta testing a "portable" operating system on more than one processor architecture... John Gilmore, Sun Microsystems