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From: "Gerrit van Niekerk" <gerritvn AT gpvno DOT co DOT za>
Organization: GPvNO
To: RayeR <glaux AT centrum DOT cz>, djgpp AT delorie DOT com
Date: Fri, 02 Nov 2007 12:50:09 +0200
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Subject: Re: PM interrupt handling - how to call old old ISR with slower rate than my new ISR
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On 2 Nov 2007 at 3:02, RayeR wrote:

> Where can I find the call_real_mode_procedure_with_iret_frame DPMI wrapper? 

Before hooking timer interrupt:
_go32_dpmi_seginfo seginfoOld;

_go32_dpmi_get_real_mode_interrupt_vector(TIMER,&seginfoOld);

In TIMER ISR:
   _go32_dpmi_registers r;

   r.x.ax = TIMER;
   r.x.cs = seginfoOld.rm_segment;
   r.x.ip = seginfoOld.rm_offset;
   r.x.ss = 0;
   r.x.sp = 0;
   disable();
   _go32_dpmi_simulate_fcall_iret(&r);

-- 
Gerrit van Niekerk
GP van Niekerk Ondernemings BK
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