Decompiling OB's Interrupt 14 handler

Since we run with OB's handler for mysterious reasons I thought that I would
look to see what it does.
(The va of the code is ffd33b48 and the real address is 0.01fc.eb48.)

As with any trap it goes off only when ET=1 and in this case when PIL < 15.
It seems to stick to using the new locals until it has saved
the g's and o's in a place located by a variable(?) pointer located at
ffef07a8. The value there now is ffefa528.