As for FreeCOM, the bug showed up on the PC (P3 650 MHz) trying to use filename completion. The beep started, then the computer freezed, while continuing to beep. I had to press Ctrl-Alt-Del to shut it up.
It's odd that my Celeron/700 doesn't have that problem, so I don't think it's CPU speed...
Sure. Borland's delay() uses timer 0. Why not rely on the referesh toggle bit instead? For example
void delay(unsigned milliseconds) /* 1 - 1985 */
{
unsigned i;
for (i = 0; i <= milliseconds * 33; i++)
{
while (inp(0x61 & 0x10) /* refresh bit toggles with each refresh */
; /* so we wait 30 µs but the first time
*/
while (inp(0x61 & 0x10)
;
}
}Award BIOS uses this principle all the time, and most computers have exactly such a BIOS ;-)
Steffen, what do you think?
Lucho
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