ImageDisk and some 8" images posted

Tony Duell ard at p850ug1.demon.co.uk
Wed Aug 3 18:42:23 CDT 2005


> Reason I ask is that I just had a look under Linux and it's possible (at
> least with 2.6 kernels - no idea about earlier) to setup the FDC from
> user-land via the fd floppy device. In other words, a Linux port might
> be possible (for someone to do! :) assuming you're not doing anything
> 'odd' with the FDC...

I can confirm that as far back as 1.2.13 Kernels, you could do what you 
liked to the floppy controller using the FDRAWCMD ioctl(). The parameters 
to that were partly to set up the DMA controller (number of bytes to 
transfer, read/write, buffer area (which didn't need to be aligned on a 
page boundary), and partly to control the FDC chip (this set included an 
array of bytes to send to the FDC command register).

I had no problems getting it to read HP 9114 floppy disks, for example.

-tony


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