Is 11/70 and 11/45 Timing Board, Similar/Same

Hi All;
Does anyone know if the Timing Board for the PDP 11/70 is Similar / Same, except for the M number, as the PDP 11/45..
IF I remember correctly somewhere it said that the PDP 11/45, 11/55 and the 11/70 all shared the same Basic Processor, I know the 11/70 has alot more stuff, (Cards).. I don't know about the 11/45 against the 11/55..
I got an 11/70 Timing Board coming soon, and I am hoping after Finger/Signal comparison that I can use it in my 11/45, IF not, at least I can use the Parts for the 11/45 (Bad) Timing Board that I have..
I am not giving up on the 11/40, but I am asking way before I need the answer, so there is time for people to Think about the Answer..
THANK YOU Marty

Marty said:

Hi All;
Does anyone know if the Timing Board for the PDP 11/70 is Similar / Same, except for the M number, as the PDP 11/45..

Click to expand...

Just compared the drawings and they are quite different. M8109 was used in the 45/55 and M8139 in the 70. The one in the 70 has some
similarities but I don't think they are close enough to work.

Hi All;
AL, Thanks for the look see, I haven't looked at either of the Drawings as of yet..
Nor done any finger signal comparison, It would be nice, If I could make it work..
I would like to get an M8109, for my PDP 11/45, but Don't want to pay an ARM and a LEG for it..
There is one listed as for sale on Henk's Digital Computers site, But there is no email address, nor any way that I can see to get ahold of Him.. And I don't know If He is with this group.. And what to look for, as far as a name..
THANK YOU Marty

Marty,

I will send you Henk's email address by PM.

Jack

Hi Jack;
THANK YOU !!!
Marty