Talbot Andrew wrote:
The parallel port would enable simple hardware to allow a crude D/A
converter for driving a VCXO, but isn't the LPT port difficult to drive
under Windoze programming ?
Direct I/O to peripherals is a no-no (impossible to do, anyway...) in
Windows NT, Windows 2000 and XP. But there are DLLs around
that contain a VxD inside, that allow to do that, acting as proxies on
the behalf of your code.
What coding are you going to use - ie. the code table and timings, - then I
can write something for driving my DDS board.
I didn't say I am going to write code just now... :-) I have a few sheets of
paper filled with possible coding schemes, but still have to make up my mind,
there are many variables in the whole picture... but will keep you informed.
73 Alberto I2PHD
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