> SPACE the final^^^^frontier. Seen it,done it,read the book,got the T-shirt....
WRONG. XBRA is *NOT* an inter-process communication protocol. Rather, it's a
well defined, legal way for programs to share interrupts, traps, etc...
The old way of vector stealing, if one program installs into a vector and another program installs in those same vectors, the first program gets disabled (or worse, crashes!)... XBRA allows those two programs to share the same vector
(i.e. share the VBLANK) ... and for clever programmers, they could even allow
your program to unhook itself from the vector chain, although I haven't seen
a program which does this yet.
If you have the XBRA documentation, please read over it again! :)