Does anyone use RT-11?

Date: Mon, 10 Sep 2007 11:33:39 +0200> From: cc at corti-net.de> To: cctalk at classiccmp.org> Subject: Re: Does anyone use RT-11?> > On Sun, 9 Sep 2007, Jerome H. Fine wrote:> > Yes that seems to be the goal, but what will you do with> > RT-11 at that point? If playing games is the objective,> > then RT-11 is not really being used except to start the> > process.> > I do this on our 11/10 with VT11/VR17 to play lunar lander (the visitors > and especially children like it!).> > > Based on the few responses, I guess that no one is writing> > any programs, let alone modifying any utilities. And almost> > certainly, no one seems to be modifying device drivers or> > the operating system itself. If anyone is actually interested> > in that aspect, please let me know.> > Don't say that. My "main" PDP11 in our museum is a 11/34 with all sorts of > peripherals. I've built a small interface to attach a PC to a DR11-C and > wrote a RT-11 device driver (works in FB and XM). On the PC side I have > virtual disk images of various sizes (up to 65536 RT-11 blocks) and on the > RT-11 side I have up to eight devices that map to these disk images. > Although the data path between the 11 and the PC is only 8 bits (I was too > lazy to make it 16 bits, that would have required two latches and logic > for multiplexing/demultiplexing) I achieve data rates of about 70kB/s. I > can transfer whole RK05 disk images in less than one minute (that's btw. > the reason why I built this interface) with COPY/DEV (in both directions).> And I can boot from the virtual disk...> The project isn't finished yet (no time, other projects, ...). The > protocol needs to be more robust and fault tolerant, and I need to > implement some kind of timeouts on both sides.> > Ah, almost forgot that: Since there is no official way to format DECtapes > under RT-11, I've enhanced the modified TC11 formatter from the spring '76 > sigtape to be verbose and tell the user what to do. I think this counts as > "modifying utilities", doesn't it? :-)> > Christian