Fixnums now go from 0 to 255 instead of -5 to 40. Nothings seems to
tree2201e3b2bb10864eccbf5efffe41de321eb7e67f
-rw-r--r-- 9830 library.scm
-rw-r--r-- 56185 picobit-vm.c
-rw-r--r-- 104191 picobit.scm
-rw-r--r-- 388 red-green.scm
-rw-r--r-- 31589 robot.scm