Re: DAC software



miso@xxxxxxxxx wrote:
On Apr 2, 5:27 pm, Vladimir Vassilevsky <antispam_bo...@xxxxxxxxxxx>
wrote:


In our days, you will need a
kernel level driver to access the PC parallel port directly.

Modern OSs like to own the hardware, which makes hacking difficult.


For that reason, I keep the 12-year old computer with Win98 as an OS. Win95/98/ME allows the direct access to ports with the interrupts disabled.

There are the special drivers for the port hacking in WinNT/2k/XP (dllportio and such). It works, however the timing jitter is horrible.

I don't know if there are the drivers like that for Vista. I am not familiar with Vista internal architecture, however somebody told me that it is very difficult to patch the I/O map there.

I'll leave the company name out of it, but we did a bit banging
solution using the dos found on the windows boot disk. I thought it
was cheesy, but not a particularly bad idea. Somehow a virus got on
the boot disks we gave to customers. At that point I thought it was a
bad idea. ;-)

Finding a floppy drive is a problem in our days. Booting MSDOS from DVD would be fun though. :-)



Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
.

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