Re: Looking for Limited Function Board
Hi, I have looked into my PDP-8/a computers now. The small one have the limited function board that you want. That is the machine that should be identical to yours. In my big PDP-8a/420 I have the same board as you have "have.jpg" but in another revision (no IDC header connector, just the DIL connector). The big machine is a core memory machine. I had a quick look at the schematics, they are not compatible. /Anders > Hi Paul > > I have put pictures of the boards here: > > http://pdp8.se/slask/LFB > > have.jpg is the board I have and want.jpg is the one > I'm looking for. > > The identifying numbers are in aproximately the same > place. But you can clearly see that the "want" board > is much simplified and if I interpret the > documentation correctly they are not compatible. > > I'm happy to be proven wrong, maybe I should just try > it. > > /P > > > On Tue, Feb 05, 2019 at 07:54:39PM -0600, Paul Anderson via cctalk wrote: >> Hi Pontus, >> >> I looked at my limited function front panels, and they were 54-11507s. I >> have not looked at any prints. Where did you find the 54-11165 number? >> Could it be for a Q-bus system? >> >> The 50-X is the etched PCB. DEC usually added a 1 to that number to >> make it complete board. >> >> Thanks, Paul >> >> >> >> On Mon, Feb 4, 2019 at 9:41 PM Paul Anderson wrote: >> >> > I have a few of the limited function and programmers panels. I do not >> > recall either of them being dependent on particular backplane. I'll >> try to >> > pull a few a few later and check the part number on them. >> > >> > Remember, a 54-X number can become a 70-X with the addition of >> a >> > cable or something simple. >> > >> > Paul >> > >> > On Mon, Feb 4, 2019 at 12:51 PM Anders Sandahl via cctech < >> > cct...@classiccmp.org> wrote: >> > >> >> > Date: Sun, 3 Feb 2019 22:22:42 +0100 >> >> > From: Pontus Pihlgren >> >> > To: "General Discussion: On-Topic and Off-Topic Posts" >> >> > >> >> > Subject: Looking for Limited Function Board >> >> > Message-ID: <20190203212242.gf24...@update.uu.se> >> >> > Content-Type: text/plain; charset=us-ascii >> >> > >> >> > Hi >> >> > >> >> > I'm restoring a PDP-8/a with the help of some >> >> > friends. The CPU is now passing the MAINDECs I've >> >> > thrown at it. The memory is a modern semiconductor >> >> > board my friend Anders Sandahl made. >> >> > >> >> > This machine is pieced together from several others >> >> > and the limited function panel I got does not match >> >> > the backplane I have. >> >> > >> >> > My theory is the DEC simplified the design of the >> >> > boardto cut costs and simpler design is not >> >> > compatible. Mine is labeled (on the PCB): >> >> > >> >> > "LIMITED FUNCTION BD. >> >> > 5411507 >> >> > 5011506C-P2" >> >> > >> >> > And the one I need is: >> >> > >> >> > "LIMITED FUNCTION >> >> > 5411165 >> >> > 5011167" >> >> > >> >> > However, the picture I have of the other is not so >> >> > good. I may have read the numbera wrong. >> >> > >> >> > I would very much like to buy one to finish this >> >> > project. >> >> > >> >> > /P >> >> >> >> Får du inget napp så ritar jag upp ett kort till dig, det borde gå >> att >> >> flytta över brytarna från det du har. Lite synd att scrappa ett >> >> originalkort bara, men är man försiktigt så man inte tar sönder det >> så går >> >> det ju att återställa... >> >> >> >> /A >> >> >> >> >
Re: Looking for Limited Function Board
Hi Paul I have put pictures of the boards here: http://pdp8.se/slask/LFB have.jpg is the board I have and want.jpg is the one I'm looking for. The identifying numbers are in aproximately the same place. But you can clearly see that the "want" board is much simplified and if I interpret the documentation correctly they are not compatible. I'm happy to be proven wrong, maybe I should just try it. /P On Tue, Feb 05, 2019 at 07:54:39PM -0600, Paul Anderson via cctalk wrote: > Hi Pontus, > > I looked at my limited function front panels, and they were 54-11507s. I > have not looked at any prints. Where did you find the 54-11165 number? > Could it be for a Q-bus system? > > The 50-X is the etched PCB. DEC usually added a 1 to that number to > make it complete board. > > Thanks, Paul > > > > On Mon, Feb 4, 2019 at 9:41 PM Paul Anderson wrote: > > > I have a few of the limited function and programmers panels. I do not > > recall either of them being dependent on particular backplane. I'll try to > > pull a few a few later and check the part number on them. > > > > Remember, a 54-X number can become a 70-X with the addition of a > > cable or something simple. > > > > Paul > > > > On Mon, Feb 4, 2019 at 12:51 PM Anders Sandahl via cctech < > > cct...@classiccmp.org> wrote: > > > >> > Date: Sun, 3 Feb 2019 22:22:42 +0100 > >> > From: Pontus Pihlgren > >> > To: "General Discussion: On-Topic and Off-Topic Posts" > >> > > >> > Subject: Looking for Limited Function Board > >> > Message-ID: <20190203212242.gf24...@update.uu.se> > >> > Content-Type: text/plain; charset=us-ascii > >> > > >> > Hi > >> > > >> > I'm restoring a PDP-8/a with the help of some > >> > friends. The CPU is now passing the MAINDECs I've > >> > thrown at it. The memory is a modern semiconductor > >> > board my friend Anders Sandahl made. > >> > > >> > This machine is pieced together from several others > >> > and the limited function panel I got does not match > >> > the backplane I have. > >> > > >> > My theory is the DEC simplified the design of the > >> > boardto cut costs and simpler design is not > >> > compatible. Mine is labeled (on the PCB): > >> > > >> > "LIMITED FUNCTION BD. > >> > 5411507 > >> > 5011506C-P2" > >> > > >> > And the one I need is: > >> > > >> > "LIMITED FUNCTION > >> > 5411165 > >> > 5011167" > >> > > >> > However, the picture I have of the other is not so > >> > good. I may have read the numbera wrong. > >> > > >> > I would very much like to buy one to finish this > >> > project. > >> > > >> > /P > >> > >> Får du inget napp så ritar jag upp ett kort till dig, det borde gå att > >> flytta över brytarna från det du har. Lite synd att scrappa ett > >> originalkort bara, men är man försiktigt så man inte tar sönder det så går > >> det ju att återställa... > >> > >> /A > >> > >>
Re: Looking for Limited Function Board
Hi Pontus, I looked at my limited function front panels, and they were 54-11507s. I have not looked at any prints. Where did you find the 54-11165 number? Could it be for a Q-bus system? The 50-X is the etched PCB. DEC usually added a 1 to that number to make it complete board. Thanks, Paul On Mon, Feb 4, 2019 at 9:41 PM Paul Anderson wrote: > I have a few of the limited function and programmers panels. I do not > recall either of them being dependent on particular backplane. I'll try to > pull a few a few later and check the part number on them. > > Remember, a 54-X number can become a 70-X with the addition of a > cable or something simple. > > Paul > > On Mon, Feb 4, 2019 at 12:51 PM Anders Sandahl via cctech < > cct...@classiccmp.org> wrote: > >> > Date: Sun, 3 Feb 2019 22:22:42 +0100 >> > From: Pontus Pihlgren >> > To: "General Discussion: On-Topic and Off-Topic Posts" >> > >> > Subject: Looking for Limited Function Board >> > Message-ID: <20190203212242.gf24...@update.uu.se> >> > Content-Type: text/plain; charset=us-ascii >> > >> > Hi >> > >> > I'm restoring a PDP-8/a with the help of some >> > friends. The CPU is now passing the MAINDECs I've >> > thrown at it. The memory is a modern semiconductor >> > board my friend Anders Sandahl made. >> > >> > This machine is pieced together from several others >> > and the limited function panel I got does not match >> > the backplane I have. >> > >> > My theory is the DEC simplified the design of the >> > boardto cut costs and simpler design is not >> > compatible. Mine is labeled (on the PCB): >> > >> > "LIMITED FUNCTION BD. >> > 5411507 >> > 5011506C-P2" >> > >> > And the one I need is: >> > >> > "LIMITED FUNCTION >> > 5411165 >> > 5011167" >> > >> > However, the picture I have of the other is not so >> > good. I may have read the numbera wrong. >> > >> > I would very much like to buy one to finish this >> > project. >> > >> > /P >> >> Får du inget napp så ritar jag upp ett kort till dig, det borde gå att >> flytta över brytarna från det du har. Lite synd att scrappa ett >> originalkort bara, men är man försiktigt så man inte tar sönder det så går >> det ju att återställa... >> >> /A >> >>
Re: Looking for Limited Function Board
I have a few of the limited function and programmers panels. I do not recall either of them being dependent on particular backplane. I'll try to pull a few a few later and check the part number on them. Remember, a 54-X number can become a 70-X with the addition of a cable or something simple. Paul On Mon, Feb 4, 2019 at 12:51 PM Anders Sandahl via cctech < cct...@classiccmp.org> wrote: > > Date: Sun, 3 Feb 2019 22:22:42 +0100 > > From: Pontus Pihlgren > > To: "General Discussion: On-Topic and Off-Topic Posts" > > > > Subject: Looking for Limited Function Board > > Message-ID: <20190203212242.gf24...@update.uu.se> > > Content-Type: text/plain; charset=us-ascii > > > > Hi > > > > I'm restoring a PDP-8/a with the help of some > > friends. The CPU is now passing the MAINDECs I've > > thrown at it. The memory is a modern semiconductor > > board my friend Anders Sandahl made. > > > > This machine is pieced together from several others > > and the limited function panel I got does not match > > the backplane I have. > > > > My theory is the DEC simplified the design of the > > boardto cut costs and simpler design is not > > compatible. Mine is labeled (on the PCB): > > > > "LIMITED FUNCTION BD. > > 5411507 > > 5011506C-P2" > > > > And the one I need is: > > > > "LIMITED FUNCTION > > 5411165 > > 5011167" > > > > However, the picture I have of the other is not so > > good. I may have read the numbera wrong. > > > > I would very much like to buy one to finish this > > project. > > > > /P > > Får du inget napp så ritar jag upp ett kort till dig, det borde gå att > flytta över brytarna från det du har. Lite synd att scrappa ett > originalkort bara, men är man försiktigt så man inte tar sönder det så går > det ju att återställa... > > /A > >
Re: Looking for Limited Function Board
> Date: Sun, 3 Feb 2019 22:22:42 +0100 > From: Pontus Pihlgren > To: "General Discussion: On-Topic and Off-Topic Posts" > > Subject: Looking for Limited Function Board > Message-ID: <20190203212242.gf24...@update.uu.se> > Content-Type: text/plain; charset=us-ascii > > Hi > > I'm restoring a PDP-8/a with the help of some > friends. The CPU is now passing the MAINDECs I've > thrown at it. The memory is a modern semiconductor > board my friend Anders Sandahl made. > > This machine is pieced together from several others > and the limited function panel I got does not match > the backplane I have. > > My theory is the DEC simplified the design of the > boardto cut costs and simpler design is not > compatible. Mine is labeled (on the PCB): > > "LIMITED FUNCTION BD. > 5411507 > 5011506C-P2" > > And the one I need is: > > "LIMITED FUNCTION > 5411165 > 5011167" > > However, the picture I have of the other is not so > good. I may have read the numbera wrong. > > I would very much like to buy one to finish this > project. > > /P Får du inget napp så ritar jag upp ett kort till dig, det borde gå att flytta över brytarna från det du har. Lite synd att scrappa ett originalkort bara, men är man försiktigt så man inte tar sönder det så går det ju att återställa... /A
Looking for Limited Function Board
Hi I'm restoring a PDP-8/a with the help of some friends. The CPU is now passing the MAINDECs I've thrown at it. The memory is a modern semiconductor board my friend Anders Sandahl made. This machine is pieced together from several others and the limited function panel I got does not match the backplane I have. My theory is the DEC simplified the design of the boardto cut costs and simpler design is not compatible. Mine is labeled (on the PCB): "LIMITED FUNCTION BD. 5411507 5011506C-P2" And the one I need is: "LIMITED FUNCTION 5411165 5011167" However, the picture I have of the other is not so good. I may have read the numbera wrong. I would very much like to buy one to finish this project. /P
