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Test if system is VAX?

• not2b 3y ago
  It wouldn't work, because in the early days of 4.xbsd, whether page 0 was mapped or not depended on linker options. Originally page 0 was mapped, this led to problems with people being sloppy with null pointers, so the default was changed (so that dereferencing a null pointer, whether reading or writing, would trap). But there was an option o map page 0 to get crappy/broken programs to work.