RT11 / RSTS-E games

Paul Koning paulkoning at comcast.net
Fri May 8 10:16:56 CDT 2015

> On May 7, 2015, at 8:34 PM, Johnny Billquist <bqt at update.uu.se> wrote:
> On 2015-05-07 20:41, Ethan Dicks wrote:
>> ...
>> If you are looking for games you _can_ play, a couple of years ago at
>> VCFe, I hacked one of the RT-11 Z-Machines to run on RSTS/E (it needed
>> one extra system call to do with memory allocation) so we could play
>> Zork, Planetfall, etc., on Dave McGuire's PDP-11/70.  If you wanted
>> that I could try to dig it up.  You just need a fistful of .Z3 files
>> to play, then.
> I would guess that would be ZEMU? Do you have the RSTS/E fixes around. I have been hoping for ages that someone would just try and get it running under RSTS/E, since then I could incorporate those fixes into the distribution as well.

On that “extra system call” — is that because RT-11 emulation on RSTS assigns an RT11 memory limit based on information in the executable file?  If so, you can work around that by switching into the RT11 runtime system, issuing the command “SI 28” then run the program.


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