In the following code something strange happens ! If I keep pressed any
of ALT+Arrow, keys, they are extracted two times from buffer then getch
seems to stop; if I release and press again ALT+arrow nothing changes:
the only way to exit from this condition is press another key a single
time.
What seems to happen is that kbhit say some keys are present in buffer
but for getch don't see any data and waits for a key. Why this happen ?
If I remove the delay all is working correctly. I've inserted a delay
to reproduce thi problem that I've found on another bigger project
where loop delay is 155ms.
Last thing: I've verified this problem only on newer motherboards !
Please help me !!
Thank you.
Simone
#include <stdio.h>
#include <dpmi.h>
int Handle()
{
int vv;
int lo, hi;
__dpmi_regs reg;
reg.x.ax = 0x10 << 8; /* shift 10h into AH */
__dpmi_int( 0x16, ®);
vv= reg.x.ax ;
lo = vv & 0X00FF;
hi= ( vv & 0XFF00) >8;
vv=( ((lo == 0)|(lo == 224)) ? hi+256 : lo);
return vv;
} // Handle
int main(void)
{
int i;
do
{
i=0;
while(kbhit())
{
fprintf(stdout,"i=%d\n",i++);
fprintf(stdout,"%c\n",getch());
}
fprintf(stdout,"%d\n",Handle());
delay(155);
} while(1);
}
