14 Dec
2001
14 Dec
'01
12:54 p.m.
Richard Erlacher wrote:
The old UARTs were, far and away, IMHO, the easiest
and most forgiving, though.
They required the most external logic, though, and once the more intgrated
chips, e.g. the 6850 with its integrated handshaking and interrupt logic, and
the 8250, with its integrated that logic plus the internal baud rate generator,
came down somewhat in price, the more highly integrated parts became more
popular.
I still like the idea simple serial hardware with a fixed baud rate.
I never did like chips that need lots software to service them
especially
during a interrupt. I guess I got spoiled with the PDP-8.
--
Ben Franchuk --- Pre-historic Cpu's --
www.jetnet.ab.ca/users/bfranchuk/index.html