Re: PDP-11/05 (was: PDP-11/05 microcode dump?)
It's no gunkies but I wrote up a few notes about my 11/05 variants and
support issues here:
https://www.vintagecomputer.net/digital/.
Bill
On Sun, Jun 13, 2021, 4:44 PM Tom Uban via cctalk
wrote:
> I am working on the first of my two 11/05s. Interestingly, it has the
> early version M7261E Control
> Logic & Microprogram board and the later version M7260 Data Paths board
> (with circular baud rate
> selector switch) as described in:
>
> http://gunkies.org/wiki/KD11-B_CPU
>
> From the description there, it seems like an older/newer combination, but
> maybe that was common. I
> would not have guessed that the four possible combinations would all work
> together, but maybe they do?
>
> I have a couple different drawing sets for the 11/05 and while some have
> the matching M7260
> schematic, only the GT40 drawings (I found on bitsavers) has the M7261E
> schematic:
>
>
> http://www.bitsavers.org/pdf/dec/graphics/VT11/GT40_Graphic_Terminal_Engineering_Drawings_Feb73.pdf
>
> The GT40 drawings has the PROM listings and related, so I am hoping that
> they match what is in the
> two boards.
>
> Presently, the machine sometimes runs relatively well and other times it
> does not. It does have bit
> 1 stuck ON in memory, but that should be a relatively simple task to
> diagnose as it is not
> intermittent. When the machine is "working" I am able to deposit 0777 at
> 0100 and run. When running
> this simple program, I've experimented with flexing the boards and such,
> so it doesn't seem like an
> obvious poor connection, but that remains to be seen.
>
> The machine is a configuration #2 model (as described in the "gunkies"
> site) and my initial messing
> with KM11 boards, reveals that I can step the microcode with a KM11 in
> either the #1 or #2 position,
> but when two KM11s are installed at the same time, they do not function
> properly together. Is this
> expected or do I have an issue there too?
>
> Thanks much to those who have provided details and documents on the web,
> they have already been of
> great value and will most certainly continue to be a resource in the
> future.
>
> More updates in the future...
>
> --tom
>
> On 5/6/16 5:32 PM, Noel Chiappa wrote:
> > > From: Mattis Lind
> >
> > > Thanks Noel for sorting this out.
> >
> > Eh, de nada. But thank you.
> >
> >
> > >> I wonder if the ucode in the two versions is identical? The uROM
> chip
> > >> numbers should give it, (if they are the same on both versions,
> albeit
> > >> in different locations on the board), but I have yet to check.
> Does
> > >> anyone happen to know?
> >
> > OK, so the situation here is pretty complicated. To start with / make
> things
> > worse, that CPU uses lots of PROMs. Lots and lots and lots and lots of
> PROMs.
> >
> > For the data paths board (M7260), both major versions appear to contain
> the
> > same PROMs (going by the DEC part numbers), but the chip location (Exx)
> > numbers are all different.
> >
> > For the control board (M7261), the C, E ('early' version) and F ('late'
> > version) etch revisions each contain mostly the same PROMs, but
> apparently
> > with slight differences between the sets of PROMs in each (as reflected
> in
> > different DEC part numbers). For details see:
> >
> > http://gunkies.org/wiki/PDP-11/05#Control_PROMs
> >
> > to which I have just added all the gory details.
> >
> > As to getting the contents of all of them dumped in machine-readable
> form -
> > oi vey!
> >
> >
> > >> on the earlier version (prints for that version are in the GT40
> prints
> > >> online
> >
> > It turns out that I have hard-copy prints for the "C" etch revision of
> the
> > M7261, which do not yet appear to be online; the GT40 prints have the "E"
> > etch revision.
> >
> > I will scan the pages for that revision of the board, and put them up
> 'soon'.
> > (I'm not doing the whole print set, it's about 1" thick, and most of
> them are
> > for other things anyway, like MM11-L memory, etc.)
> >
> > Noel
> >
>
>
PDP-11/05 (was: PDP-11/05 microcode dump?)
I am working on the first of my two 11/05s. Interestingly, it has the early
version M7261E Control
Logic & Microprogram board and the later version M7260 Data Paths board (with
circular baud rate
selector switch) as described in:
http://gunkies.org/wiki/KD11-B_CPU
>From the description there, it seems like an older/newer combination, but
>maybe that was common. I
would not have guessed that the four possible combinations would all work
together, but maybe they do?
I have a couple different drawing sets for the 11/05 and while some have the
matching M7260
schematic, only the GT40 drawings (I found on bitsavers) has the M7261E
schematic:
http://www.bitsavers.org/pdf/dec/graphics/VT11/GT40_Graphic_Terminal_Engineering_Drawings_Feb73.pdf
The GT40 drawings has the PROM listings and related, so I am hoping that they
match what is in the
two boards.
Presently, the machine sometimes runs relatively well and other times it does
not. It does have bit
1 stuck ON in memory, but that should be a relatively simple task to diagnose
as it is not
intermittent. When the machine is "working" I am able to deposit 0777 at 0100
and run. When running
this simple program, I've experimented with flexing the boards and such, so it
doesn't seem like an
obvious poor connection, but that remains to be seen.
The machine is a configuration #2 model (as described in the "gunkies" site)
and my initial messing
with KM11 boards, reveals that I can step the microcode with a KM11 in either
the #1 or #2 position,
but when two KM11s are installed at the same time, they do not function
properly together. Is this
expected or do I have an issue there too?
Thanks much to those who have provided details and documents on the web, they
have already been of
great value and will most certainly continue to be a resource in the future.
More updates in the future...
--tom
On 5/6/16 5:32 PM, Noel Chiappa wrote:
> > From: Mattis Lind
>
> > Thanks Noel for sorting this out.
>
> Eh, de nada. But thank you.
>
>
> >> I wonder if the ucode in the two versions is identical? The uROM chip
> >> numbers should give it, (if they are the same on both versions, albeit
> >> in different locations on the board), but I have yet to check. Does
> >> anyone happen to know?
>
> OK, so the situation here is pretty complicated. To start with / make things
> worse, that CPU uses lots of PROMs. Lots and lots and lots and lots of PROMs.
>
> For the data paths board (M7260), both major versions appear to contain the
> same PROMs (going by the DEC part numbers), but the chip location (Exx)
> numbers are all different.
>
> For the control board (M7261), the C, E ('early' version) and F ('late'
> version) etch revisions each contain mostly the same PROMs, but apparently
> with slight differences between the sets of PROMs in each (as reflected in
> different DEC part numbers). For details see:
>
> http://gunkies.org/wiki/PDP-11/05#Control_PROMs
>
> to which I have just added all the gory details.
>
> As to getting the contents of all of them dumped in machine-readable form -
> oi vey!
>
>
> >> on the earlier version (prints for that version are in the GT40 prints
> >> online
>
> It turns out that I have hard-copy prints for the "C" etch revision of the
> M7261, which do not yet appear to be online; the GT40 prints have the "E"
> etch revision.
>
> I will scan the pages for that revision of the board, and put them up 'soon'.
> (I'm not doing the whole print set, it's about 1" thick, and most of them are
> for other things anyway, like MM11-L memory, etc.)
>
> Noel
>
Re: Disk drives, keypunch offered in SF bay area:
That must be Carl’s. He is lightening up his collection in anticipation of a move. He has some great items. He just sold a fully functioning HP 1000F system in two racks. Marc > On Jun 13, 2021, at 10:23 AM, Chuck Guzis via cctalk > wrote: > > > This fellow-s been posting on VCF; thus far, he's offered a pair of > Perkin-Elmer disk drives and a USB-modified 029 keypunch. Stuff is > pickup-ony by July 8. > > The drives: > https://sfbay.craigslist.org/pen/sop/d/los-altos-perkin-elmer-interdata-vt/7336069902.html > > --Chuck > >
Re: Disk drives, keypunch offered in SF bay area:
Hey, I got one of those. Diablo 33 or something like that. And a Q bus controller that emulates 4 RK05's per assembly (5mb fixed head, 5mb removable) Big question is how can we get them from SF to MD? Any thoughts? On 6/13/2021 1:22 PM, Chuck Guzis via cctalk wrote: This fellow-s been posting on VCF; thus far, he's offered a pair of Perkin-Elmer disk drives and a USB-modified 029 keypunch. Stuff is pickup-ony by July 8. The drives: https://sfbay.craigslist.org/pen/sop/d/los-altos-perkin-elmer-interdata-vt/7336069902.html --Chuck
Disk drives, keypunch offered in SF bay area:
This fellow-s been posting on VCF; thus far, he's offered a pair of Perkin-Elmer disk drives and a USB-modified 029 keypunch. Stuff is pickup-ony by July 8. The drives: https://sfbay.craigslist.org/pen/sop/d/los-altos-perkin-elmer-interdata-vt/7336069902.html --Chuck
Re: IBM Logic IC equivalency information needed
Den lör 12 juni 2021 kl 10:54 skrev Christian Corti via cctalk < cctalk@classiccmp.org>: > On Fri, 11 Jun 2021, Santo Nucifora wrote: > > I am currently working on an IBM 5100 that has some issues. I know for > > certain that the 5100 has a bad graphics controller card so I need to dig > > into component level replacements for those ICs I can replace. I have a > > list of logic chip equivalents to the IBM part numbers that are written > on > > the chips but I don't think it's 100% accurate because IBM part number > > 1582601 comes back as 74151 "DATA SEL/MUX" but when I use one of those > > cheap logic chip testers (that is surprisingly accurate), it comes back > as > > a 74157. For the record, if I test a 74151, it comes back as a 74151 so > the > > tester is correct. I just want to make sure the table I have is accurate > > and that the tester is not 100% accurate or if that chip has failed and > > tests like a 74157 in it's state. > > > > This is the current list I am using that I got from somewhere but I don't > > recall where: > > https://vintagecomputer.ca/ibm-vintage-logic-chip-equivalency-list/ > > Does anyone have an IBM logic chip equivalency table for 74 series logic > > chips? > > This list looks like a faulty transcription of my list here: > ftp://computermuseum.informatik.uni-stuttgart.de/ibm/ibmparts.txt > > In my list, it is "1582601 74157 DATA SEL/MUX". > This list came from some IBM internal copies with unknown source. > Thanks for the list Christian! I have a broken 5110 PSU here. Unfortunately it is not covering any of the chips in the IBM 5110 Switch mode PSU. There are three metal cans numbered 1582779, 1582780 and 1582781. 16 pin types. Then there are four 361497 which I think is just three transistors and some resistors (at least that is what a picture I have seen is indicating). The latter type is 12 pin. Anyone that has a clue what the 15827xx are? https://i.imgur.com/MexGosO.jpg /Mattis > Christian >
