Path: utzoo!utgpu!water!watmath!clyde!burl!codas!mtune!whuts!homxb!hou2d!afb3
From: afb3@hou2d.UUCP (A.BALDWIN)
Newsgroups: comp.sys.dec
Subject: Re: PDP-11 Clocks
Summary: DL11-WA & KL11-L -- The same clock!!
Keywords: kl-11, dl-11
Message-ID: <1843@hou2d.UUCP>
Date: 8 Jan 88 17:29:13 GMT
References: <222@spock.UUCP>
Distribution: na
Organization: AT&T Bell Laboratories, Holmdel
Lines: 30

In article <222@spock.UUCP>, eric@spock.UUCP (Eric Volpe) writes:
> 
> -
> Can someone tell me if the DL11-WA SLU/*RTC* stands for Real Time Clock,
> as well as the serial interface? I'm wondering if the machine will think
> this is one of the kl-11 clocks, or is it something completely
> different? Also, does anyone wanna sell a KL11-L or -P? Thanks!
> 
> 						...decvax!yale!spock!eric
Eric,

The "clock" portion of the DL11-WA is exactly equivalent to the KL11-L
(e.g. the "line clock").  It even has the same addresses.  A PDP-11
with a DL11-WA doesn't need a line clock card to run (a reasonable
OS).

I found this out in 1976 when I received delivery of a then new to the
world PDP-11/55.  Field service thought they had been shorted a board
(the line clock) and the reference manuals turned up a draft document
on the DR11-W.......

Interesting history trivia.


Al Baldwin
AT&T-Bell Labs
...!ihnp4!hou2d!afb3


[These opinions are my own....Who else would want them!!!]