> On Sep 14, 2025, at 17:46, Milo Velimirović via cctalk > <[email protected]> wrote: > > > >> On Sep 13, 2025, at 12:59 PM, ben via cctalk <[email protected]> wrote: >> >> On 2025-09-13 10:35 a.m., Milo Velimirović via cctalk wrote: >>>> On Sep 13, 2025, at 10:49 AM, Bill Gunshannon via cctalk >>>> <[email protected]> wrote: >>>>> On 9/11/2025 4:30 PM, Jim Davis via cctalk wrote: >>>>>> You can get an emulated 11/23 running 4.2 BSD for $3.00. That's crazy. >>>>> >>>>> Can you tell me where? With that glaring error I am really >>>>> interested in learning more. Google finds nothing with those >>>>> terms. >>>>> >>>>> bill >>> It has to be hyperbole. >>> No pdp11 ran 4.x, the best you can do is 2.11— which is still being patched >>> and maintained; see the pidp-11 mailing list. Probably not $3.00, but >>> $30.00 will get you a sytem on a DIP package that will emulate most >>> anything. Spend a bit more for a Pi4 or Pi5 if you want to drive a PiDP-11. >> >> But can you still get a real PDP-11 replacement for driving vintage hardware? >> > Real pdp11s are somewhat scarce, but . . . > If you’ve got pdp11 UNIBUS or Q-Bus devices/controllers AND a backplane to > plug them into, but no pdp11 CPU, then a Unibone or Qbone is the thing you > want. It will be as much (or as little) of a CPU as you want. > >
The only cpu that the unibone and qbone emulate is a pdp-11/20 processor, (in addition to several peripherals) last I knew. Nothing with memory management, for example. QBus PDP-11 machines can be had (eBay has a couple, one looks like it probably has, one looks like it probably has a power supply that needs work) and would be easier for most to deal with as compared to most of the UNIBUS machines. Maybe you could sell John that old PDP 11 that I recall you obtaining from me decades ago. ;) of course it doesn’t have any memory management either. JRJ
