Jordi Guillaumes Pons


El 20 febr 2016, a les 1:31, Clement T. Cole <[email protected]> va escriure:
> Will
> 
> Look at the sources to the standalone system for UNIX v7.  Running on bare 
> metal no MMU     You should get the idea. 
> 
> Sent from my iPad
> 
>>> On Feb 19, 2016, at 5:22 PM, Timothe Litt <[email protected]> wrote:
>>> 
>>> On 19-Feb-16 17:13, Will Senn wrote:
>>> Timothe,
>>> 
>>> Thanks for responding. This sounds reasonable. I'm ok with using the .TTYOU 
>>> and .TTYIN macros which call EMT's for actual programs in RT-11. But, while 
>>> learning, there are some things like this that I want to do that may be 
>>> tricky/ill advised to do in RT-11. 
>>> 
>>> What do you think the easiest way is to load a program like this directly 
>>> onto the bare hardware (simulated, of course)?
>>> 
>>> Thanks,
>> Link it as an absolute image (no libraries), transfer to your host by 
>> network or paper tape, load with sim> load.
>> 

I wrote a post about how to do that using a gnu toolchain:

http://ancientbits.blogspot.com.es/2012/07/programming-barebones-pdp11.html?m=1

After that I begun to write a toy PDP11 kernel. If you are curious, partake 
feely from 

https://github.com/jguillaumes/muxx



>> Or if you are ambitious, just run it under RT11, set IPL to 7 and execute a 
>> RESET instruction.  That will disable all the peripherals, and you can start 
>> writing your own OS.  You'll have to set up your own trap and interrupt 
>> vectors.  Memory management if you want it...
>> 
>> I don't recommend the ambitious route unless you have a lot of time and a 
>> high tolerance for pain.
>> 
>> 
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