I may have some spare massbus cards available to trade for something of equal use value if your or anyone is interested in haggling a deal offline Bill
On Mon, Oct 5, 2026 at 6:26 PM Jim Bender via cctalk <[email protected]> wrote: > > > It's been a while since my initial posting about this project but it is > time > for an update. > > This has been mostly a spare time project, and you know how life tends > gets in > the way sometimes... > > The work itself has been a bit of a "maze of twisty little passages, all > alike" with many potholes and obstacles, but progress has been made. > > The video below tells the tale: > > https://youtu.be/KwaNschJg6w > > > Synopsis: > > A real PDP-11/70 boots RSTS/E V10.1 through it's unmodified RH70 controller > with the data coming from the Massbus emulator. > > Operation is rock solid and so far have not been able to break it. It > also > passes the ERHAE1 XXDP diagnostic without errors. > > We now have a viable option for modern storage for Massbus systems. > > Still to do is performance optimizations, hardening against some edge > cases, > and a large amount of code cleanup. > > I only have a PDP-11/70 to test with, but it *should* work with any Massbus > system. Adherence to the DEC Massbus Specification was strict and every > attempt made to make it behave as a proper Massbus device rather than just > coding things to make the RH70 happy. > > I am kicking around the idea of putting together a blog chronicling the > various trials, tribulations and milestones encountered along the way if > anyone is interested in reading the gory details.... > > > Cheers! > Jim > > > > > >
