ypch              130 src/dps8/shm.c   int ypch = 0;
ypch              156 src/dps8/shm.c                   ypch++;
ypch              157 src/dps8/shm.c                   if (ypch == 1)
ypch              171 src/dps8/shm.c       if (lkpid != 0 && ypch == 0)