On Mon, 14 Apr 2003 10:44:32 -0400, you wrote:

>You can view the pinout here:
>
>http://sunsite.tut.fi/hwb/co_Pcmcia.html
>
>Notably, there are no serial lines.  The PCMCIA is essentially a 16 bit
>data bus that's very similar to ISA.  The major differences allow for
>hot-swapping, automatic card identification, and IIRC allows the OS to
>change the I/O space and IRQ usage of the card itself.

The IO address and IRQ mapping is done by the PC host controller, not the=
 card. The controller maps
the card's fixed address space within the PCMCIA bus to a configurable =
place in the PC's I/O memory.
This will not be an issue when driving from a PIC.

>I suspect you'll find that your old modem card has or emulates a generic
>16550 UART.  You need to determine if it uses a fixed I/O address, or if
>it's configurable.  If it's fixed you may have luck just talking
>directly to the 16550.
This should work - the address is likely to be at the start of the PCMCIA=
 I/O address space. =20

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