Port IO in old NT-style driver
- From: "Mark K Vallevand" <mark.vallevand@xxxxxxxxxx>
- Date: Fri, 8 Jul 2005 13:10:58 -0500
I have an old NT-style driver that works fine. I need to make a change to
add some port reads and writes, which were never done before. I'm not
interested in changing this to a PnP driver. I just need to make a quick
fix.
I can't get the driver to read the IO ports. I even went back to the DDK,
dug up the old portio program and borrowed its code. The IO ports are at
400-47f and the kernel debugger reads them fine. My driver always gets FF
back from any IO port read. I changed to portio code to use the 16 address
decoding in the CM_RESOURCE_LIST. I changed it to use PCIBus, but then
changed it back to Isa. Nothing works.
Is there a simple way to read and write IO ports? I'll cheat and break all
the driver rules. I just need to get this fixed and off my plate.
--
Regards.
Mark K Vallevand Mark.Vallevand@xxxxxxxxxx
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- Benjamin Franklin
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