Hi,
> How I can not acknowledge?
The board you have connected to your parallel port connects the strobe and
acknowledge pins, which acknowledges data as soon as it is output. By
not having that connection, you wouldn't be acknowledging.
> I checked, it works on some machines (generates square on pins - 0.5 Hz,
> 50%),
> but not on this one with main board:
> ECS K7S5AL (SIS735),SND,DDR+DIMM,LAN,ATX.
What does it do on that one? Something or nothing?
> I would be grateful for some more suggestions,
Are you sure that there is no other program accessing the parallel port?
A printer spooler for example?
Blaise
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