Date: Wed, 9 Nov 1994 01:18:03 -0800 (PST)
From: Chih-Hao Tsai <c-tsai4 AT uiuc DOT edu>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: A question about writing interrupt handler in gcc

Hi,

I have a question about writing 'real mode' interrupt
handler in gcc. When writing protected mode interrupt
handler, one can use 

_do32_dpmi_chain_protected_mode_interrupt_vector

to call the old handler by the end of the new handler.

However, there is no real mode counterparts for this
function call. I tried to use _go32_dpmi_simulate_fcall_iret
to call the old handler, but it didn't work.

Can anybody tell me how to chain original hanlder in
a real mode interrupt handler? I've tried a thousand
times.

By the way, I've read the file 'dpmi.c' and couldn't
figure out why there isn't a 

_go32_dpmi_chain_real_mode_interrupt_vector.
                 ^^^^





Because I haven't subscribed this discussion group, please
send your answers to me via email. I really need help.

Thanks a lot!




:: Chih-Hao Tsai (c-tsai4 AT uiuc DOT edu) at Human Perception and Performance ::
:: Group, Beckman Institute for Advanced Science and Technology     and ::
:: Division of Learning and Instruction, Dept of Educational Psychology ::
:: ............ University of Illinois at Urbana-Champaign ............ ::

> _go32_dpmi_simulate_fcall_iret(&regs);