On Thu, May 26, 2016 at 9:38 AM, Noel Chiappa <j...@mercury.lcs.mit.edu> wrote:
> > From: William Degnan > > > Here is the layout starting from slot 9/11 of the expansion cabinet > > Just slot numbers by themselves aren't much use, because if there are any > non-UNIBUS backplanes (e.g. custom backplanes for core memory, for an RH11 > - > which has its own custom backplane, you can't use a regular SPC/MUD > 'UNIBUS' > backplane to hold it), we need to know what those are, and where. > > Note that many boards can only go in a specific slot in a custom backplane, > and vice verse - some slots in such backplanes will only hold a specific > kind > of card. > > Taking the RH11-AB as an example: it comes with a 9-slot custom backplane. > Hex > RH11 boards M7294 and M7295 go in slots 3 and 2, respectively (and nowhere > else, and nothing else can go in those slots). UNIBUS A in is in slot 1, > connectors A/B; UNIBUS A out is in slot 9, connectors A/B. UNIBUS B in is > in > slot 8, connectors A/B; UNIBUS A out is in slot 7, connectors A/B. > > <snip> > > It looks like slot 31 starts another backplane. Given the cards that are > plugged in (LP11, DL11, etc), it's probably a 'UNIBUS' backplane (i.e. SPC > or > MUD slots). > > Noel > Thank you for taking a few to send this information. I was just curious about the role of the 9300, to explain the configuration I am working with. I am working to get up to speed on UNIBUS architecture. For now, I am going to focus on getting any DL11-x serial card or two running...and maybe a configure one to read diagnostics from the teletype the other for VT220 @ 2400/9600. AS I had mentioned earlier I had this system running PDPGUI but my previously-working DL11-W pooped out. I have the manual, need to diagnose fix or replace. I am also working on DL11-x (M7800-x) cards on hand. Bill
