unsafePerformIO

[David Sabel]

In read your paper ""Tackling the Awkward Squad: monadic input / output,
concurrency, exceptions, and foreign-language calls in Haskell",  and have
a question about unsafePerformIO.

In your operational semantic of the IO-Monad you tell nothing about, how
'unsafe' IO actions are performed, is there another paper / documentation
about
this available, or can you - or someone else - give me a review about that?

David
JWGU Frankfurt