The standard option "use dos wedge" should disable the IDEDOS dos wedge
and make the JiffyDOS key bindings visible again, but it indeed doesn't
seem to work in idedos20190819. Regardless if the state of that config
option the IDEDOS function keys are in effect.
Maybe you could redefine them with a boot file to the JiffyDOS standard
values, e.g. "@T" for F4.
Ciao,
Marc 'BlackJack' Rintsch