Received: (from major@localhost)
	by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id RAA12928
	for pups-liszt; Mon, 16 Mar 1998 17:58:46 +1100 (EST)
X-Authentication-Warning: minnie.cs.adfa.oz.au: major set sender to owner-pups@minnie.cs.adfa.oz.au using -f
Received: from asia.Uznet.NET (asia.uznet.net [193.220.92.23])
	by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with ESMTP id RAA12923
	for <pups@minnie.cs.adfa.oz.au>; Mon, 16 Mar 1998 17:58:30 +1100 (EST)
Received: (from stacy@localhost)
	by asia.Uznet.NET (8.8.8/8.8.8) id MAA00643
	for pups@minnie.cs.adfa.oz.au; Mon, 16 Mar 1998 12:00:16 +0500
Date: Mon, 16 Mar 1998 12:00:16 +0500
From: Stacy Minkin <stacy@asia.uznet.net>
Message-Id: <199803160700.MAA00643@asia.Uznet.NET>
To: pups@minnie.cs.adfa.oz.au
Subject: RQDX3 problems
Sender: owner-pups@minnie.cs.adfa.oz.au
Precedence: bulk

Hi pdp people!

Few days ago I wrote about my hardware problems and asked
for hardware guru. Now I've solved some of them -
I checked my backplane and it was 18-bits I wired 
insufficient A19-A21 signals and my CPU acessed memory and
now it runs ok. But! I still do not know what happens to
my RQDX3! 
I know that this question has little relation to UNIX 
and apologize for that.

I hardly suspect circuitry fault but may be some
other reasons. It looks like this:
-My RQDX3 is now connected to simple 5-inch floppy drive
when I power up the machine I see no activity on ANY
pin of RQDX3 to RQDX SIG. DIST. 50-pin connector! I mean 
there is no triggering signals hence my floppy 
also does nothing. When I try to execute bootstrap or
simply debug RQDX3 registers from console it looks like this:

RESET
CLR @#1772150
<checking 1772152 - it holds 5500 - kinda normal>
MOV #100000,@#1772152	; controller passes INIT step 1
			; no ints enabled, no vector specified,
			; UDA OWN bit set. Rings are zero length
<checking 1772152 - it holds 10000 - step one passed>
MOV #xxxxxx,@#1772152	; controller passes INIT step 2 
			; specifying low address bits
<checking 1772152 - it holds 20000 or something alike - 
		    no error bit is set - I'm sure- step2 passed>
MOV #0,@#1772152	; controller passes INIT step 3 - specifying
			; high address bits>
<here we can wait for eternity!!!!!!!! Step 3 will never complete>

Does anybody know what does it mean? I also have TMSCP TQK70
controller but no tape drive for it. When I try to run it there 
is absolutely similar situation - I think this happens each time 
[T]MSCP controller tries to powerup without any drives connected to it.
So I'm looking for help from somebody who can give a hint
about which signal should i check to assertain in absence of hardware fault.
I have no drawings for RQDX3 neither user's guide. It can even be caused
by wrong setting of switches/jumpers - I dont know.


Stacy.