109. Disabling ROMS
     ~~~~~~~~~~~~~~
There are times when it is useful to suppress a resident ROM temporarily,
even if <Break> or <Ctrl><Break> is pressed. You can do this by Poking the
ROM private workspace table with 64, ie setting bit 6. Eg., if your DFS ROM
is in socket 3, then you can kill it by typing ?&DF3=64, and then pressing
<Break>. If you want to kill the ROM in socket 5, then use ?&DF5, and in
socket 15, (&F), you use ?&DFF.

To enable the ROM again, either switch off for a few seconds, or else Poke
the original value back. For example, if PRINT ?&DF3 <Return> normally gives
151, then replacing 64 with this original value will restore the ROM after a
<Break>. Many thanks to Nick Davison of Calverley, Leeds, for this
information.