Mail Archives: djgpp/1995/05/31/12:17:03
Previously from me:
>> I realize that the p-mode handler was installed with
>> _go32_dpmi_chain_protected_mode_interrupt_vector() and so the old p-mode
>> handler will be called every time, but there isn't any old p-mode timer
>> interrupt handler, is there?
Reply from Eli Zaretskii:
>Oh, yes, there is. Otherwise, the system clock would stop ticking while
>DJGPP program is running, which it doesn't.
Guess I figured that the timer interrupt was normally unhandled in p-mode,
and so was passed down to the real-mode handler. If there really is a p-mode
timer handler, then chaining to it EVERY interrupt (because of having used
_go32_dpmi_chain_protected_mode_interrupt_vector()) would cause the system
time-of-day to gain time if the interrupts were being generated, say, 1000
times per second, no?
=============================================================================
Dave Gantose
ADF, Inc.
2001 Aerospace Pkwy. phone: (216)977-1376
Brook Park, OH 44142 email: Gantose AT lerc DOT nasa DOT gov
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