I am going to see if I can find the card inventory and installtion guide info for the TM11 so that I can confirm whether I indeed have one installed in the TU10'S cabinet. So far I have found little.
Bill Degnan twitter: billdeg vintagecomputer.net On Sep 6, 2015 8:14 AM, "Johnny Billquist" <b...@update.uu.se> wrote: > On 2015-09-05 20:25, Noel Chiappa wrote: > >> > From william degnan >> >> > I was looking to see if references to the tm11 were "module/card" >> or >> > backplane interface. >> >> I think pretty much all that earliest generation of UNIBUS interfaces were >> stand-alone backplanes (i.e. 19" wide things that went in an H960 in a >> fixed >> location, and were filled with the small Flip Chip modules); the RK11-C, >> RP11-C, RF11, and TC11 all are. >> > > Partly correct. All early Unibus controllers which did DMA had their own > backplanes. Which is why the NPR is obnoxious on the Unibus. Unlike the BR > lines, the NPR is normally always just jumpered in the backplane, and > located away from the BR lines. When DMA on single cards became more > common, this became an obvious issue on the Unibus. You have to cut the > wire on the backplane, and when you remove the card you either have to > reinsert the write, or get the bug grant card that is double height, which > also do the NPR jumper. > > But non-DMA controllers were single cards even back in the early days of > the Unibus, like the DL-11. > > (Early DMA controllers were all multiple cards, so having their own > dedicated backplanes were a pretty sane idea.) > > Johnny > > -- > Johnny Billquist || "I'm on a bus > || on a psychedelic trip > email: b...@softjar.se || Reading murder books > pdp is alive! || tryin' to stay hip" - B. Idol >
