🚀 go-pugleaf

In article <8158@tekgvs.LABS.TEK.COM>, toma@tekgvs.LABS.TEK.COM (Tom Almy) wrote:
}In article <31074@nigel.ee.udel.edu> shearer@cis.udel.edu (Rob Shearer) writes:
}>I use TC++ version 1.0.  
}>After the main() delcaration i would like to tell the system WHERE to use
}>the stack..  
}>can I just poing _SS = FP_SEG(newlocation);
}>                 _SP = FP_OFF(newoffset);
}
}Several considerations (generic across any compiler for the 80x86):
}
}2. In the sequence you give above, you must make sure that the generated
}   instruction that loads the SP immediately follows the one that loads SS.
}   The mov ss,.. instruction automatically inhibits interrupts for one
}   following instruction.
}   If this is not the case, you will need to disable interupts while
}   changing stacks.

You will also need to disable interrupts if the code can be run on an 8088,
as early versions of that chip have a microcode bug which results in
interrupts not being disabled for the instruction after a change to SS.
--
UUCP: {ucbvax,harvard}!cs.cmu.edu!ralf -=- 412-268-3053 (school) -=- FAX: ask
ARPA: ralf@cs.cmu.edu  BIT: ralf%cs.cmu.edu@CMUCCVMA  FIDO: 1:129/3.1
Disclaimer?    |   I was gratified to be able to answer promptly, and I did.
What's that?   |   I said I didn't know.  --Mark Twain