Re: [CAD_CAM_EDM_DRO] PCI Printer Ports

ghartc wrote:

> Is anyone having any problems, or any luck, getting pin-by-pin
> control of PCI type printer ports? I have a couple that want
> to appear at odd adresses like "3468" vs. the usual "278/378/3BC"
> that most control programs use.
>
> I just haven't been able to control those ports so far. This
> is WinXP, which doesn't make it any easier.
>
> Any ideas?

Under Windows NT, 2000, and I assume XP, you can't access the hardware
registers from a user-mode program. You need a DLL or VXD which runs
in real mode to access these.

There is a program called DirectIO that bridges this barrier, allowing
even DOS programs to access the printer port from a DOS window
under NT and 2000. I have not gotten DirectIO to work with all
programs, but it makes quite a few of them work just like under
Win 3.1 or 95.

Jon