Other PDP11 simulators

[Ron Hudson]

On Oct 2, 2004, at 4:55 AM, Gordon JC Pearce wrote:

> Zane H. Healy wrote:
>>> Are there any PDP11 simulators that run "right down on the iron" of 
>>> a PC?
>>>
>> As far as I know, there isn't anything that runs directly on the PC 
>> hardware, they all require an OS.  However, John Wilson mentioned 
>> something this week on the PDP-11 mailing list that sounds like he's 
>> planning on running directly on the PC HW in a future version.
>
> You *could* write one that just booted up and became a PDP-11 
> emulator.  It would be quite a lot of work - serial ports are easy to 
> program, and you could get away with BIOS calls for disk handling 
> maybe, but you could basically forget about any kind of network 
> support.  Far simpler to use one of the free Unixes.  If you were 
> really, really concerned about not letting anything else run on the 
> machine, you could say something at a Linux kernel boot prompt like:
> boot: linux init=/usr/bin/simh
>
> and simh would run in single-user mode.  This would, of course, be 
> silly.

why silly? if it would work.


>
> Gordon.
>