From:	Mat Hostetter <iclone!mjhostet AT cs DOT unm DOT edu>
Date:	Thu, 17 Jun 93 00:25:38 -0600
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	Re: itimer stuff

>It basically works, but there is one mysterious problem remaining.
>Under go32, the delays are taking 12 times as long as they should.
>It's as if something is eating 11/12 of the int 70 interrupts, or
>there is massive overhead somewhere.  I wrote similar code in  
Borland  

>C (much, much easier) and the timing is exactly right.

It has been pointed out to me that I may not be catching interrupt  
0x70 (IRQ 8?) in both real and protected mode, so I may be missing  
interrupts.  If this sounds like the culprit, can someone tell me how  
to do this in go32.exe?

I noticed that internal.doc says go32() does this:
* Handle certain time-critical exceptions, like timer tick and COM  
ports.

I looked at the mswitch.asm, and it's not obvious to me how this is  
being accomplished.  Do I want to make go32() also handle interrupt  
0x70, the real time clock interrupt?  How would I do this?

Any help would be much appreciated.

-Mat
mjhostet AT mit DOT edu

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