> > >>18267668493213428
> > > It's the representation (twos-complement or something like

that) of the

> > > lowest possible negative 64-bit integer. The first time a
> ./heLen

unfortunately my maths (and speeling was long ago) and the only book
I have that explains twos complement (Rodney Zac - programming the
Z80) is out of reach.

18267668493213428 is 0x3699EF4 is 0b11011010011001111011110100

from rusty memory 2s complement of
11011010011001111011110100
is 10100101100110000100001011 = 0x296610B which does not look like
max int

I probably got it all wrong

Mick