From:	Travis Kuhn <trav AT clark DOT edu>
Subject:	Interrupts
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Date:	Tue, 22 Nov 1994 20:14:22 -0800 (PST)

I can't seem to find an answer to my question in any documents I can 
find, and no one on comp.os.msdos.programmer could help me, so this is my 
last resort.

If I need to call an interrupt that expects a segment:offset pair to be 
in the registers, how do I do that in DJGPP?  Here's the things that I've 
tried, with no success:

1. Put the segment and offset in the SREGS struct with segment = (unsigned 
int)(some_pointer) >> 4)  and offset = some_pointer.  Then call int86x 
passing the appropriate REGS and the SREGS.  

2. Put the pointer in REGS in the offset register (ie, if the 
segment:offset pair go into es:di, I put the pointer in di) and call 
int86x.  

3. Put the segment offset pair in _go32_dpmi_registers and call int86x, 
passing _go32_dpmi_registers instead of REGS.

4. Put the segment offset pair in _go32_dpmi_registers and call 
_go32_dpmi_simulate_int.

5. Put the pointer in _go32_dpmi_registers in the extended offset 
register (ie, if es:di is the pair, then put the pointer in edi) and call 
int86x.

6.  Put the pointer in _go32_dpmi_registers in the extended offset 
register (as above) and call _go32_dpmi_simulate_int.



None of these work.  I can do other interrupts (without the need to set 
segment:offset pairs) with no trouble with either REGS/int86 or 
_go32_dpmi_registers/_go32_dpmi_simulate_int.  

Can someone tell me how to do this?

Thanks for your time.

------------------------------------------------------------------------------
Travis Kuhn        Clark College, Vancouver, Washington   |     PGP key
trav AT clark DOT edu     TIP#316  Play paintball!  Fence!       |    available
         "But now I refuse to obey." -- Emacs             |   upon request.
       

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