Questions about ioport-assignments

Komuro komurojun-mbn at
Thu Jan 14 06:39:17 EST 2010


>- Is it just a buggy card if it works at 0x300 but not 0xc300
>  (or is it maybe a problem with Linux assigning the io area)?
>- Why is IOAddrLines forced to 16 (and thus alignment to 0x10000), but only
>  if BasePort1 is 0?

Some pcmcia-card decodes only lower 10bits (0x0000-0x03FF).
Such card does not work on higher ports (0x0400-0xFFFF)

So your card is not a buggy card.

Best Regards

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