[fpc-pascal] Acces IO-ports in Linux with FPC 2.2.0

Johann Glaser Johann.Glaser at gmx.at
Thu Mar 5 17:59:59 CET 2009


> I am developing a free pascal software in Linux, which uses the
> parallel digital input/output card (with intel 8255) in an industrial PC.
> I was able to compile and run without problems with FP 2.0.4.
> Now, that the oldlinux unit is removed in the latest FPC,
> I cannot compile the program any more.
> The error messages are:
> - identifier not found "fdOpen"
> - identifier not found "fdWrite"
> - identifier not found "fdRead"

It seems you have a driver for this card and want to talk to the driver
via a Linux device (in /dev/). My first thought was you wanted to access
x86 IO ports (using IN and OUT instructions).

Simply use the online help to find the desired functions, e.g.
This also lists the constants used for the access mode.


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