[pups] 2.11BSD boot hangs.

[pups] 2.11BSD boot hangs.

[Tom Ivar Helbekkmo]

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"Steven M. Schultz" <sms at moe.2bsd.com> writes:

> > BTW: What serial parameters does 2.11BSD use? The first time I booted
> > UNIX I got garbage after "user mem  = 307200". I seted the vt220 to 7e1
> > and this worked, but is it correct?
> 
> 	Yes, 7e1 is correct - a legacy setting from eons ago.

This bothered me enough, a handful years ago, to change things a bit:

For getty/main.c:

*** main.c.ORIG	Thu Dec 29 17:22:13 1994
--- main.c	Thu Dec 29 17:21:28 1994
***************
*** 383,391 ****
--- 383,393 ----
  	char c;
  
  	c = cc;
+ #ifdef notdef /* hack to get rid of parity in getty */
  	c |= partab[c&0177] & 0200;
  	if (OP)
  		c ^= 0200;
+ #endif /* parity hack */
  	if (!UB) {
  		outbuf[obufcnt++] = c;
  		if (obufcnt >= OBUFSIZ)

For pdp/cons.c:

*** cons.c.ORIG	Sun May 11 11:21:01 1997
--- cons.c	Sun May 11 11:26:05 1997
***************
*** 62,68 ****
  	if ((tp->t_state&TS_ISOPEN) == 0) {
  		ttychars(tp);
  		tp->t_state = TS_ISOPEN|TS_CARR_ON;
! 		tp->t_flags = EVENP|ECHO|XTABS|CRMOD;
  	}
  	if (tp->t_state&TS_XCLUDE && u.u_uid != 0)
  		return (EBUSY);
--- 62,68 ----
  	if ((tp->t_state&TS_ISOPEN) == 0) {
  		ttychars(tp);
  		tp->t_state = TS_ISOPEN|TS_CARR_ON;
! 		tp->t_flags = ANYP|ECHO|XTABS|CRMOD;
  	}
  	if (tp->t_state&TS_XCLUDE && u.u_uid != 0)
  		return (EBUSY);

For sys/tty.c:

*** tty.c.ORIG	Sun May 11 11:21:40 1997
--- tty.c	Sun May 11 11:27:40 1997
***************
*** 48,53 ****
--- 48,54 ----
   */
  
  char partab[] = {
+ #ifdef notdef /* even parity setup */
  	0001,0201,0201,0001,0201,0001,0001,0201,
  	0202,0004,0003,0201,0005,0206,0201,0001,
  	0201,0001,0001,0201,0001,0201,0201,0001,
***************
*** 64,69 ****
--- 65,88 ----
  	0200,0000,0000,0200,0000,0200,0200,0000,
  	0200,0000,0000,0200,0000,0200,0200,0000,
  	0000,0200,0200,0000,0200,0000,0000,0201,
+ #else /* no parity setup follows */
+ 	0001,0001,0001,0001,0001,0001,0001,0001,
+ 	0002,0004,0003,0001,0005,0006,0001,0001,
+ 	0001,0001,0001,0001,0001,0001,0001,0001,
+ 	0001,0001,0001,0001,0001,0001,0001,0001,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0000,
+ 	0000,0000,0000,0000,0000,0000,0000,0001,
+ #endif /* end of parity selection stuff */
  
  	/*
  	 * 7 bit ascii ends with the last character above,

Hmm.  It's been a while.  I should fire up the old /83 and get all the
latest patches from Steven applied, while it's still winter, and I can
run it and the VAX without overheating my machine room.  :-)

-tih
-- 
Popularity is the hallmark of mediocrity.  --Niles Crane, "Frasier"


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From: "Fred N. van Kempen" <Fred.van.Kempen@microwalt.nl>
To: "PUPS Mailing List (E-mail)" <pups at minnie.cs.adfa.edu.au>
Subject: [pups] DEC Ultrix-11 V3.1
Date: Tue, 27 Feb 2001 21:01:50 +0100
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All,

Just a note to let you know that I am making good progress on
getting my modified Ultrix-11 V3.1 up and running.  I'll be
uploading disk images of various MicroPDP-11 (/23, /53, /73,
/83) based systems for you to enjoy :)

Most of all, I should be able to run TK50 install tapes again as
of next week, given my working 11/83 with TK50.

Many thanks go to Bill Gunshannon for the initial image (I could
not get my boot tapes to work), Warren Toomey for letting me play
lots with VTserver and integrating it into Ultrix, Kees Stravers
for giving me the hardware I needed, and, of course, to The
Wanderer for figuring out my hardware problemns with me :)

Cheers,
	Fred


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Subject: [pups] DEC Ultrix-11 V3.1  part II
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All,

> Many thanks go to ...

Blah!  And of course to Wilko Bulte, who provided the dumps of the
original V3.1 tapes, and with whom I spent quite some time debugging
the why-doesn-this-work problems with the initial tape dump files...

Fred (compiling stuff on the PDP so he can transfer stuff in and out
of the box without having to use the slow VTserver link ;-)


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Date: Tue, 27 Feb 2001 22:15:34 +0100 (CET)
Subject: cabinet issues (Re: [pups] 2.11BSD boot hangs.)
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On 27 Feb, John Holden wrote:

> On BA-23 boxes, there is a small, two lever DIP switch. [...]
Thanks for the enlightening.

As we are on the topic cabinets: Can a 11/73 run in a BA21x or BA440
cabinet? 

> You can run into problems with the BHALT line, which can be asserted by a line
> break on the console line [...]
That is the reason why I disconnect console terminals bevore I power
them off (if there is no break disable switch on the machine). :-)
-- 



tsch��,
         Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/


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Subject: Re: [pups] 2.11BSD boot hangs.
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On 26 Feb, Steven M. Schultz wrote:

> 	I suspect that one of the switches enables the line frequency clock.
> 	With out a clock running things will work (at least minimally) as
> 	long as there are some interrupts happening.   
Hmm? Why will it run with_out_ a clock?

>> OK. The machine is currently un-tar-ing /usr... :-)))
> 
> 	Fantastic!
The next adventure is un-tar-ing the source and build my own kernel...
-- 



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Date: Wed, 28 Feb 2001 14:24:22 +1100 (EST)
From: John Holden <johnh@psych.usyd.edu.au>
Message-Id: <200102280324.OAA16488 at psychwarp.psych.usyd.edu.au>
To: pups at minnie.cs.adfa.edu.au
Subject: RE: [pups] Swap device in V6?
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> The good news is, this fixed my ps problem - ps now works.  The bad news
> is that cc still fails with the following error:
> 
> fFatal error in /lib/c0
> 
> The lowercase f appears, followed shortly by the rest of the line.  I've
> tried the -c option to suppress linking, and still get this error.  I
> don't get this error on the Supnik emulator.  

'/lib/c0' is the first pass of the C compiler, after the preprocessor
has be run (the order is cc, c0, c1, c2 for the optimiser, and then 'as'
to produce the object file). I dimly recall that the various passes forked
by 'cc' didn't bother to catch signals, so any error just gives the
"Fatal error in ..." message. The '-c' would have no effect this early.

You could try the '-f' option, that uses a different compiler (with FP
emulation).

Assuming that you don't have a corrupted binary, or faulty processor/memory,
then is one obscure possibility. While a user program will not see any
difference between a 11/34 and 11/40 (except for floating point instructions),
the behaviour after a memory management fault IS different. The non ID space
processors (11/23/34/35/40/60) don't have a register to record the changes
in the general cpu registers after a fault, and it has to be calculated in
software. The 34 and 40 leave the registers in different states after a fault.

The classic example is "cmp -(sp), -(sp)" to extend the stack. This may generate
a fault because the stack needs to grow dynamically. The kernel extends the
stack (where automatic variables are allocated), and then attempts to 
reexecute the instruction. In the case of a 34 using a standard m40.s,
it sometimes gets it wrong, and is very program and data dependent.

Does this ring any bells with people having ported unix to 11/34's?


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Subject: Re: [pups] Swap device in V6?
In-Reply-To: <200102280324.OAA16488 at psychwarp.psych.usyd.edu.au> from John Holden
 at "Feb 28, 2001 02:24:22 pm"
To: John Holden <johnh at psych.usyd.edu.au>
Date: Wed, 28 Feb 2001 14:54:49 +1100 (EST)
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In article by John Holden:
> > The good news is, this fixed my ps problem - ps now works.  The bad news
> > is that cc still fails with the following error:
> > fFatal error in /lib/c0
> 
> Assuming that you don't have a corrupted binary, or faulty processor/memory,
> then is one obscure possibility. While a user program will not see any
> difference between a 11/34 and 11/40 (except for floating point instructions),
> the behaviour after a memory management fault IS different. The non ID space
> processors (11/23/34/35/40/60) don't have a register to record the changes
> in the general cpu registers after a fault, and it has to be calculated in
> software. The 34 and 40 leave the registers in different states after a fault.
> 
>The classic example is "cmp -(sp), -(sp)" to extend the stack.This may generate
> a fault because the stack needs to grow dynamically. The kernel extends the
> stack (where automatic variables are allocated), and then attempts to 
> reexecute the instruction. In the case of a 34 using a standard m40.s,
> it sometimes gets it wrong, and is very program and data dependent.
> 
> Does this ring any bells with people having ported unix to 11/34's?

That comment made me go through and scan my old AUUGNs for some articles
written by Dave Horsfall [who is on this mailing list]. I found his
article on porting V6 to the 11/23, but not for a port to the 11/34.

However, at least two tar files in the UNIX Archive have an m34.s in them:

Applications/Shoppa_Tapes/usenix_80_delaware.gz:
	delaware/maryland/os40/m34.s

Applications/Shoppa_Tapes/usenix_80_delaware.gz:m34.s:
	toronto/case/sys/conf/m34.s

The first appears to be modifications to V6, I haven't checked the latter
yet. It may be something worth pursuing.

	Warren

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On Wed, 28 Feb 2001, John Holden wrote:

> The classic example is "cmp -(sp), -(sp)" to extend the stack. This may generate
[...]
> Does this ring any bells with people having ported unix to 11/34's?

I have actual code on how we handled this in those days; who wants it?

-- 
Dave Horsfall CL VK2KFU  dave at geac.com.au  Ph: +61 2 9978-7493  Fx: * 9978-7490
Geac Computers P/L (ERP Division) 2/57 Christie St, St Leonards 2065, Australia


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CC: John Holden <johnh at psych.usyd.edu.au>, pups at minnie.cs.adfa.edu.au
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In article by Dave Horsfall:
> On Wed, 28 Feb 2001, John Holden wrote:
> > The classic example is "cmp -(sp), -(sp)" to extend the stack. This may generate
> [...]
> > Does this ring any bells with people having ported unix to 11/34's?
> I have actual code on how we handled this in those days; who wants it?

Mail it to me and I'll drop it in the archive somewhere.
Thanks Dave!
	Warren


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From: Warren Toomey <wkt@henry.cs.adfa.edu.au>
Message-Id: <200102280415.f1S4FYA00697 at henry.cs.adfa.edu.au>
Subject: [pups] V6 or V6 patches for 11/34
In-Reply-To: <Pine.GSO.4.32.0102281500120.2716-400000 at fgh.au.geac.com> from Dave
 Horsfall at "Feb 28, 2001 03:02:28 pm"
To: Dave Horsfall <dave at horsfall.org>
Date: Wed, 28 Feb 2001 15:15:34 +1100 (EST)
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In article by Dave Horsfall:
> On Wed, 28 Feb 2001, Warren Toomey wrote:
> > Mail it to me and I'll drop it in the archive somewhere.
> As attached...  I see it actually came from ChemEng.  It's for the 11/60,
> but has the 11/34 stuff in there as well.
> 
> PS: I'm sure I did a port to the 11/34 :-)

I have moved the 11/34 patches into the UNIX Archive at

	PDP-11/Bug_Fixes/V7_on11-34

They look like V7 patches though, so they may not be readily
usable on a V6 system. Those other files I mentioned may be
better. Your mileage may vary :-)

Dave, did you write an AUUGN paper for an 11/34 port, and what year
so I can go back and have another look.

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Date: Wed, 28 Feb 2001 15:15:46 +1100 (EST)
From: John Holden <johnh@psych.usyd.edu.au>
Message-Id: <200102280415.PAA17381 at psychwarp.psych.usyd.edu.au>
To: pups at minnie.cs.adfa.edu.au
Subject: Re: [pups] 2.11BSD boot hangs.
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>John Holden wrote:
>> You can run into problems with the BHALT line, which can be asserted by a line
>> break on the console line (if enabled), or on some DHV serial card emulations.
>> Turning off a terminal may be enough to halt the process if it generates a
>> serial break as the power goes down.
>
>On my /53+ running 2.11, it's enough to kick in ODT.. Very anoying, really.
>Is there any way to disable this functionality, save rewiring the backplane?

You can usually disable the HALT on break feature. When the console is on
a separate serial card :-

DEC	DLV11-E or F	Remove jumper on wire-wrap pin H

DEC	DLV11-J		wire-wrap pins X-B enables boot on break
			wire-wrap pins X-H enable halt (ODT) on break
			nothing on X disables both

Webster	WQDHV		switch 4 at J9 OFF to ignore break.

For processor cards with serial ports, I only have a manual for 11/23+. DEC
is pretty consistent, so there should be options on 11/53 and latter 11/73's.

11/23+	KDF11-B?	Remove jumper from J5-J4 and connect J3-J4
			The jumpers aren't marked on the PCB, so looking
			at the board with the Qbus fingers at the bottom,
			handles at the top, there is a vertical row of
			three jumpers on the right hand side of the board.
			towards the bottom. Top to bottom is J5, J4 and J3.
		
If anybody has manuals for 11/53+ and the quad slot 11/73's and can send me
the details, I'll collate the information, and add it to my web page at :-

	http://www.psych.usyd.edu.au/pdp-11/

The 11/53+ I have does have lots of jumpers, but no numbers or letters beside
them.

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Date: Wed, 28 Feb 2001 16:59:41 +1100 (EST)
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Subject: [pups] Re: V6 or V6 patches for 11/34
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On Wed, 28 Feb 2001, Warren Toomey wrote:

> Dave, did you write an AUUGN paper for an 11/34 port, and what year
> so I can go back and have another look.

Vol 1 No 6.  "Implementing UNIX on a PDP-11/34" (sub-titled: "What does
the `F' in "RK05-F" really stand for ?").

I still have the nroff source available...  It's about 1983-ish.

-- 
Dave Horsfall CL VK2KFU  dave at geac.com.au  Ph: +61 2 9978-7493  Fx: * 9978-7490
Geac Computers P/L (ERP Division) 2/57 Christie St, St Leonards 2065, Australia


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Subject: [pups] TS05
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Dear All,
I now have one of these but the tape hub locking mechanism is acting up.  Has
anyone got a set of the maintenance docs for a TS05 that they can scan for me?

Regards

Robin