On 22 January 2014 11:30, Mark Pizzolato - Info Comm <[email protected]> wrote: > Hi Christian, > > Thanks for this report. > > This does sound odd. > > I can't speak to what to expect when you configure a simulator with > insufficient resources for the operating system to run, but your observation > that Ctrl-E doesn't provide a way back to the "sim>" prompt suggests > something strange in the simulator itself. > > Please create an issue at https://github.com/simh/simh/issues to report and > track this problem. > > I doubt it has anything to do with the particular windows system you are > running on, so you don't have to run back home to test. The configuration > file you're running with would be useful. > > Thanks. > > - Mark Well, actually I didn't expect the RSX-11/S baseline system to require more than 256KB of RAM, but I am apparently wrong. (I think it's RSX-11/S that is used for the baseline, I'm not sure. Wholly new to the world of RSX-11.) Trying it with 384KB of RAM worked fine (it didn't crash kill the sim). And the bug is reproducible on my home W7 system as well.
As a further test; I attempted to bootstrap the baseline system on a 256KB system, with the system console directed to a telnet port as opposed to running straight from the SIMH executable. While the RSX-11 baseline still dies, the simulator itself doesn't. (I.e. I can send a Ctrl+E and the simulator does halt to the sim> prompt.) I'll open a proper issue/trouble ticket on the GitHub shortly. On 22 January 2014 11:34, Johnny Billquist <[email protected]> wrote: > Sounds like a problem in simh, yes. > > But just to clarify one thing with RSX here. The problem is not about not > having enough memory to allocate a checkpoint space. What the error means is > that RSX do not have a checkpoint space. > Checkpoint space is the RSX term for disk space used to swap out running > tasks to, in order to free memory. > > But yes, the basic problem is that you have too little memory. The startup > script will setup a checkpoint space for you, but you don't even make it > that far... The basic tasks activated at startup is already requiring more > memory than you have. > > Johnny I'm brand new to the RSX-11 game so I didn't know that. As I mentioned in my reply to Mark, I think the baseline install system is RSX-11/S, which I thought had very small memory requirements. Plus it seems a bit of a troll on the part of the RSX-11 developers, it won't run on an 18-bit system, but will run a 22-bit system with just 128KB more RAM; compare to RSTS/E 10.1 which works fine on a 256KB system. In any case, this appears to be a problem with SIMH itself, not so much with RSX-11 (even if it is a misconfiguration issue that causes RSX-11 to crash and show the bug). Regards, Christian -- Christian M. Gauger-Cosgrove STCKON08DS0 _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
