Re: Modified Supnik emulator for the 11 - TUHS

25 Aug 1999

...
   From:
staylor(a)mrynet.com (S. Akmentins-Teilors)  
 	THe other change I had to make was to 'devices.c' to speed up the
 	clock - it's still not right for a PPro-200 but is better than it
 	was (the clock was running far too slow, now it's just ~10% too slow). 
The same similar tweak on Supnik has me to within seconds on the hour.  They're
all gonna start losing it under load anyways, but that's life when running
an emulator under non-RT ;)

...
   And if anyone
has managed to get the Begemot emulator
 working on recent FreeBSD-4.0-CURRENT versions, I'd be  
 	Not FreeBSD but if you're getting bit by the same thing I did earlier
 	under another BSD that switched from a.out to ELF the changes below
 	may be useful to you. 
Actually, I had resolved issue of linking and the prepended underscores before.  
The compile has always been clean, but the program simply doesn't work.
For example, run with -b from the command line, it returns the shell prompt
almost immediately.  Otherwise, when booting it simply indicates:
	DCOK = 1 asserted
and goes back to the emulator prompt.
That happens regardless of disk image used, etc... I can't effect anything
other than these exhibitions.

Perhaps somewith with access to 4.0-CURRENT, and who has worked with the
code itself could find the time to figured it out? ;)

-skots
--
Scott G. Akmentins-Taylor     InterNet: staylor(a)mrynet.com
MRY Systems			        staylor(a)mrynet.lv
    (Skots Gregorijs Akmentins-Teilors -- just call me "Skots")
		----- Labak miris neka sarkans -----

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...
 From Warren Toomey &lt;wkt(a)henry.cs.adfa.edu.au&gt; Thu
Aug 26 09:53:30 1999 Received: from henry.cs.adfa.edu.au (henry.cs.adfa.edu.au
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Message-Id: &lt;199908252353.JAA07610(a)henry.cs.adfa.edu.au&gt;
Subject: Re: Modified Supnik emulator for the 11
In-Reply-To: &lt;199908252113.OAA15059(a)mrynet.com&gt; from "S.
Akmentins-Teilors" at "Aug 25, 1999  2:13:40 pm"
To: staylor(a)mrynet.com (S. Akmentins-Teilors)
Date: Thu, 26 Aug 1999 09:53:30 +1000 (EST)
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In article by S. Akmentins-Teilors:
[Supnik emulator improvements]
...
  Is anyone else out the hacking it up and interested in
sharing
 any work?
 			-skots 
I'm sure Bob Supnik would appreciate your changes.

Cheers,
	Warren

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...
 From "Steven M. Schultz"
&lt;sms(a)moe.2bsd.com&gt; Thu Aug 26 15:26:27 1999 
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To: pups(a)minnie.cs.adfa.edu.au
Subject: Re: Modified Supnik emulator for the 11
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Hi -

...
  From: staylor(a)mrynet.com (S. Akmentins-Teilors)

 The same similar tweak on Supnik has me to within seconds on the hour. They're
 all gonna start losing it under load anyways, but that's life when running
 an emulator under non-RT ;) 
	Actually my problem with the Supnik emulator is that the clock runs
	_very_ fast - the "PDP11" ends up being hours ahead of the real time
	after recompiling a kernel or two.

	p11 on the other hand tends to run slow - tweeking the device.c value
	was aimed at speeding up the clock.  

...
 Actually,I had resolved issue of linking and the
prepended underscores before.  
	With a change to 'geni.c' or by editing the instab.s file?

...
  For example, run with -b from the command line, it
returns the shell prompt
 almost immediately.  Otherwise, when booting it simply indicates:
 	DCOK = 1 asserted 
	Yep - that's what I was seeing until I regenerated the instab.s file
	by running 'geni'.  The emulator would compile and link with a 
	manually edited instab.s file but simply would not run correctly.  

	Since the same RP06 image worked with the Supnik emulator I knew it
	wasn't in the 2.11BSD area.

	Steven

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