Question

i have a device (cash drawer) and i would like to directly communicate with the device. I know that its on address f1. Also openbit is 01.

As i’ve understood so far, i’d need to send 1 to memory address f1 and the cash drawer should open. Though using asm, i get access violation. Then again i’ve read that windows does not let you communicate directly to device i/o addresses (need to use win). What would be the correct way to send the data to that address.
Note that i cannot use drivers, because i can’t communicate with the driver inside my application.
Op. system is win7.

Thanks in advance!

Answer 1

There was a library called inpout32.dll that allowed direct port access you can find it here

http://logix4u.net/Inpout32.dll_Discussion/write_DELPHI_for_inpout32.dll.html

But i don’t know if supports windows 7.