SJIS converter converts tilde(0x7e) and DEL (0x7f) to '?'

takeshi.asano@Japan 1997-01-27

Character->Byte converter converts tilde (0x7e) and DEL (0x7f)
to '?'. With attached program InOut.java:

asano@furikake[1943]$ echo '~' | java InOut EUCJIS SJIS | od -xc
0000000 3f0a
           ? \n
0000002
asano@furikake[1944]$ echo '^?' | java InOut EUCJIS SJIS | od -xc
0000000 3f0a
           ? \n
0000002
asano@furikake[1945]$ echo '^?' | java InOut SJIS EUCJIS | od -xc
0000000 7f0a
         177 \n
0000002
asano@furikake[1946]$ echo '~' | java InOut SJIS EUCJIS | od -xc
0000000 7e0a
           ~ \n