17 Oct
2011
17 Oct
'11
3:21 p.m.
On Mon, 17 Oct 2011, Tony Duell wrote:
Being pedantic about it, it appears you were
bit-banging serial I/O over
lines of the IBM printer interface, in which case I think it becomes a
serial port :-).
and LATER IBM "printer interface"s did not require ANY modifiaction for
use bi-directionally, in spite of that NOT being what IBM had "intended".