ADSP 2191-Alu overflow latch mode

Dear members,
I am newbie and this mode is blurred for me. I know that one of the
ways to process overflows is the saturation and adsp 2191 supports
this mode, but I read from adsp219x/2192 dsp hardware reference that
these processors support ALU overflow latch mode yet. This issue is
not clear explained in the book and I would like someone to point me
references which explain this mode or explains me briefly.
 
Thanks in advance,
Tio

tioenrique7@yahoo.com (Tio) wrote in message news:<e73b8363.0311020124.2d026a1f@posting.google.com>...

Hi.

 That is the mode of overflow status. Not the mode of overflow
handling. If you turn on AV LATCH MODE, the AV bit of ASTAT will
become "sticky" to the "1". In other word, once it causes overflow, AV
bit keeps "1" until you explicily celar that.

Regards,
Suikan.


> these processors support ALU overflow latch mode yet. This issue is
> not clear explained in the book and I would like someone to point me
> references which explain this mode or explains me briefly.