Well, I finally got around to posting this on the CHWiki, in case
anybody was curious about this.
https://gunkies.org/wiki/DEC_KA650_Memory_Subsystem
On 6/17/19 7:56 PM, Joe Zatarski wrote:
OK, so where should a thing like this go: https://pastebin.com/taQwaTV6
Anybody got a decent place to
> From: Rob Doyle
> http://www.bitsavers.org/pdf/dec/unibus/RH11-C_Engineering_Drawings.pdf
Oooh, thanks ever so much. Not sure how I missed that when I looked on
BitSavers for RH11 stuff! Very illuminating - eventually! The M7294-YA seems
to be a manual ECO to the M7294; there's a
On 11/23/2019 2:10 PM, Noel Chiappa via cctalk wrote:
From: Rob Doyle
Your memory is correct. The RH11C was the buffered version of the
RH11
Umm, both the -AB and -B have FIFOs - confirmed from the prints. (I
have an M7294 if we want to confirm that the prints aren't confused.)
Now, maybe
> From: Rob Doyle
> Your memory is correct. The RH11C was the buffered version of the RH11
Umm, both the -AB and -B have FIFOs - confirmed from the prints. (I have
an M7294 if we want to confirm that the prints aren't confused.) Now,
maybe the -C has a _bigger_ FIFO (e.g. large enough to
This thread makes me very happy.
I have a KS10 that I'm working on (quite slowly). The PSU is checked out
and working. Then console seems to work, I can deposit/examine to CRAM
and RAM.
Next step will be to load micro code and I've been mentally preparing to
tackle an RH11 emulator for the
> From: Chris Zach
> The MSV11-QC board ... failed startup diagnostics with what looks like
> a stuck bit. .. now I need engineering schematics for that board so I
> can replace one of the 41256 memory chips. On the positive side it looks
like
> a pretty obvious stuck bit,
On 11/22/2019 3:05 PM, Eric Smith via cctalk wrote:
One version of the RH11 added a small FIFO (called a "silo" by DEC, IIRC)
in the data path. I don't recall which suffix that was, nor whether it was
the version used in the KS10.
Your memory is correct. The RH11C was the buffered version of
did anything more ever turn up?
I'd like to try getting a 16-bit 1.43 running, there is a set of disks on ebay,
but the seller has blocked me
https://www.ebay.com/itm/193098921854
On 6/28/19 7:17 PM, Jonathan Haddox via cctalk wrote:
> Just sending a thanks for the replies from various folks on
> the Revision J prints (September 1993).
Ooops, typo: '1973'.
Noel
> From: Eric Smith
> One version of the RH11 added a small FIFO (called a "silo" by DEC,
> IIRC) in the data path. I don't recall which suffix that was, nor
> whether it was the version used in the KS10.
Well, the -AB has the FIFO, according to the Revision J prints (September
> From: Jörg Hoppe
> UniBone can be used in UNIBUS-A SPC slots in 18 bit mode without any
> extra adapters? And can emulate an RH11-C there
As far as I can see, yes.
> even if the RH11 is supposed to run in UNIBUS B?
Well, all RH11's have both UNIBUS A and UNIBUS B; under
Yeah, it's kind of cool but takes up an insane amount of space. For
whatever reason I kept it through the decades and it holds the VT52
perfectly.
Now I'm wondering if it's worth fixing the LS120 that's out in the shed.
I sold an LA36 about a year or three ago, the LS120 was a weird duck:
I seem to recall that when the ribbon cable is in backwards, the fault
light comes on.
True. First cable faults hard (READY/FAULT on) no matter what. Second
cable would turn off the Fault light and allow spinup (right direction)
and ready. However when I tried to boot the drive went fault.
Matt,
Would combined postage be cheaper? I would like a set too but the cost seemed
horrid
Dave
> -Original Message-
> From: cctalk On Behalf Of Matt Burke via
> cctalk
> Sent: 23 November 2019 10:30
> To: Guy Dunphy via cctalk
> Subject: Re: Disposing: IBM Microchannel cards, for
Hi Guy,
I'm interested in the IRMAlink cards, particularly the software and
documentation as I already have an ISA IRMAlink card and there doesn't
seem to be any copies online.
I'm located in the UK so postage will probably be fairly expensive. Are
you willing to ship the items here?
Regards,
I seem to recall that when the ribbon cable is in backwards, the fault
light comes on.
Paul
On Fri, Nov 22, 2019 at 7:55 PM Chris Zach via cctalk
wrote:
> Normally my answer would be "no". *However* there is mention that
> changing 3 jumpers on an RL02 will allow you to read an RL01 pack (not
2. When doing 18bit on UNIBUS-A we put all kind of signal levels
on parity lines PA,PB = DATA<16:17>.
Won't the KS10 CPU interpret these as real BUS parity errors generated
by some UNIBUS-A device?
I asked nonsense here: if UNIBUS-A is 18bit too, no parity will be evaluted of
course.
Joerg
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