MITS 2SIO serial chip?

From: Bill Pechter <pechter_at_ureach.com>
Date: Thu Dec 20 16:52:19 2001

---- On Fri, 14 Dec 2001, Allison
(ajp166_at_bellatlantic.net) wrote:

> 8251 was an OK chip, it had bugs, FYI
there are three versions
> and each has it's oddities! I have tons
of them and use them
> but, you do have to be aware of the
oddities. The worst ones
> are initial programming after reset
(buffer clear bug) and the
> repeats last character on /cts false if TX
shifter is not empty
> (8251A). However the 2SIO didn't use it.
>
>
> NS* did use them as did many others. The
worst chip was
> the 8250.
>
> Allison


IIRC the Intel 8251 did full Sync as well as
Async which was a plus. It's annoying
drawback -- (DEC used it in the Robin and
Rainbow) was the lack of modem flow control
support.

I'd have killed for an 8251 with
CTS/RTS/DSR/DTR and DCD all on chip.

Perhaps it should've been done on two chips
if Intel couldn't get it on one.

Bill
Received on Thu Dec 20 2001 - 16:52:19 GMT