How does the Applesoft INT (vs. FP) command work?

[MdntTrain <js@cimmeri.com>]

Hi, folks.

  On a II+, if INTBASIC is loaded into the Language Card ram (LCr), I
know *what* the INT command does -- it switches from Applesoft in ROM
to the BASIC in the LCr ..  but does anyone know exactly what steps
occur when INT is run?

  At some point, INT must activate the LCr bank, which would then
immediately make Applesoft (thus presumably the rest of the INT
command code) disappear.. so I does INT set up something like a page 3
route to do the bank switch, then start intbasic at E000?

  Thank you for any explanations-
 -John