🚀 go-pugleaf

Anyone out there have any experience with making BIOS, XBIOS, and/or GEMDOS
calls recursively?  I'm writing a multi-tasking kernel, and trying to find
a safe way to allow multiple processes access to operating system functions.
My understanding is that upon entry to the BIOS trap routines, registers
are saved in savptr ($4a2).  However, the default save area contains enough
room for only three levels of re-entrancy.  Can this situation be resolved
simply by allocating a larger area of memory and setting savptr to point to
it?

Also, does anyone know if any conflics may arise if a process were preempted
in the middle of the BIOS, only to have another process make a BIOS call,
possibly the same one that was interrupted?  The same question goes for the
XBIOS and GEMDOS.  Thanks in advance for any help you can offer.


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| Bill Dorsey          'Imagination is more important than knowledge.'        |
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