[High-Speed-CW] Does Curtis Keyer chip 8043 support Iambic Mode B

[Paul F. Sehorne]

I have a homebrewed keyer that I build back in the 80's from a Curtis 
8043.  I've long since lost any docs I may have had at the time.  They 
keyer is using Mode A. I'm wondering if it supports Mode B.  A search on 
the web was inclusive.  I have found some info that indicates that the 
8044B was the first Curtis chip to support Mode B (thus the 'B' in the 
model number), but I've also found a link that infers that the 8043 also 
supported Mode B.  There are references to 8043 -1, -2, and -3.  Perhaps 
one of them supports Mode B.  The model number on the chip that I have 
is just 8043.

Thanks,
Paul, WI5F