[fpc-pascal]OS develing.

[Florian Klaempfl]

At 14:35 29.12.01 -0500, you wrote:
>om
>
>I am getting back to work again... My current half-baked plan is to skip
>making the thing load on a raw system and instead use DOS's brilliantly
>designed and perfectly reliable loader. ;)
>
>The units document could use a master units index that collects all the
>unit overviews into a few pages of description. -- again I'm looking for
>roadmaps and guideposts....
>
>My biggest questions at the moment have to do with actually writing a
>kernel in FPC; and then writing programs that can be loaded and run
>correctly in my far-from-standard OS environment...
>
>It seems that my biggest enemy is the 'system' unit... From the
>description, it seems that it is loaded IMPLICITLY by the compiler with
>no "uses" statement. This is doublepluss ungood because My OS design is
>about a 180 degree departure from what the current system unit does, How
>do I get the compiler to require the system unit be loaded explicitly?

The compiler needs the system unit because it loads all type definitions
from the system. I think Marco gave already the hint with the fake rtl.
Put only things which the compiler needs into the system unit and the
OS specific things into an extra unit.