Which RT-11 for an 11/03

Richard Cini rich.cini at verizon.net
Thu Mar 10 13:55:29 CST 2016

Thanks Jay. Admittedly I'm fishing here. I know that Heath had their own RT-11 for their floppy system but I don't have the floppy. The system is fairly generic in that it has only the CPU, RAM and two SLUs (one of which is used for an emulated TU58). Unless DEC made changes to the microm on the LSI-11, I think a regular distribution should work. 


Sent from my iPhone

> On Mar 10, 2016, at 2:46 PM, Jay West <jwest at classiccmp.org> wrote:
> The OP was specifically asking about RT11 on a Heathkit H11, not "just any
> ol' LSI-11".
> Very possible I'm completely incorrect here, but I thought I recalled that
> DEC gave heathkit a special price on H11 boards and OS license and such - so
> that Heathkit could produce the system for a price that the home user could
> actually afford back in the day. And because DEC was highly concerned that
> someone would buy a card or item from Heathkit and use it in a "real DEC
> PDP11" (business channel) where it would cost a lot more money normally -
> they did *something* to introduce an incompatibility of some sort between an
> H11 and a "real" pdp11?
> J

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