Ideas on checking carry bit

[sabbagh]

I am trying to hack a program (Bradley's C Forth 83) that requires me
to check (in assembly) the "carry set" bit.  Since I only have the
"complete" set of Iris manuals, there is no mention of a carry bit in
the Assembly language guide; only that the "add" instruction generates
an "overflow exception" if the result cannot be extended as a 32-bit
number.

1.  How does one detect an overflow exception?

2.  Is this (as I guess) equivalent to a "carry bit set" ?

3.  Can I implement the equivalent of checking a carry bit without using
    assembly?

Hadil G. Sabbagh
E-mail:		sabbagh at cs.nyu.edu
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