[Linux-parport] Mode changes in Parallel Port

[Ravi Shah]

Hi,

What happens when we change the mode of the port from say SPP to Nibble or say SPP to
ECP? 

I understand that in some case it might make some extra registers available, but at the
same time the way handshaking is done also changes. So does that mean that hardware
starts interpreting the lines in different way in different modes? Or does that mean that
it crosses some lines through its internal logic so that correct lines affect corret
registers?

Thanks in advance for help,
Ravi

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