ImageDisk under Win2k - test-drb@ccmp.vtda.org

10 Jan 2006

...
 From: dave04a at dunfield.com 
...

> Dave Dunfield wrote:
> 
> > 
> > IMD needs:
> >  - unrestricted access to the floppy disk controller hardware.
> >  - Nobody else messing with the FDC hardware/interrupts while it is
> >    active.
> >  - to not be held-up while some other task decides to hog the CPU for
> >    a little while (there are real-time critical aspects to the analysis 
phase)
...

 Winders 2K fails on pretty much all of the above. I haven't tried VPC, but  
 Matter of interest, and I haven't got time to try it, but will it work 
 in FreeDOS? 
I have not tried it (don't have FD installed anywhere), however I don't see why
it would not - as long as FD leaves the FDC alone when it's not accessing it it
should be OK (I access the FDC by direct manipulation - the only DOS
functions I use specifically relating to the FDC are get/set the interrupt  vector,
...
 and the only BIOS function I use is "reset disk
system" which I do just before
I exit). 
Hi Dave
 How do you deal with DMA? On my code I needed to setup the
DMA controller as well.
Dwight

...

Regards,
Dave
-- 
dave04a (at)    Dave Dunfield
dunfield (dot)  Firmware development services & tools: www.dunfield.com
com             Vintage computing equipment collector. 