On Fri, Jan 11, 2019 at 3:48 PM Clem Cole <clemc@ccc.com> wrote:

>
>
> On Fri, Jan 11, 2019 at 5:09 PM <reed@reedmedia.net> wrote:
>
>>
>> The select system call was added in 81/02/07 with no comment. Commit
>> history shows in 81/10/17: "cleanup (mpx removal, old tty removal,
>> beginnings of select)" and in 81/10/11 "first boot with select()" which
>> includes lots of changes like replace lots of tty code and use
>> selwakeup().
>
>
> Actually, that is a nice memory jog.   Chesson wrote mpx(2) for DataKit
> for UNIX/TS.   IIRC: It was not originally part of v7, but he sent copies
> of out to a number of folks.    Somwhere I might even have the email when
> he sent it to me at CMU in the late 1970s.   The point is that it was in
> the wild as it were at a lot of places; certainly at UCB by 4.1.    Sam and
> Joy had seen  and messed with mpx(2) before select(2) was concieved.
>
> To Paul's question - mpx(2) was done for networking.
>

How is that different than the pk driver that was in v7?

Warner