This is why I put them up in .imd (ImageDisk, it works on DOS) and .img (image). Oddly enough I went to install SPSS/X on xHomer and it blew the emulator sky high (crashed the "Pro"). Then I put it on my real 380 running 3.2. It installed but when I ran it the program displayed the opening page (bitmapped, worked on Xhomer) then wanted Disk 3 in drive 0. Well, then it wanted it write unlocked (no way on a install disk), so I used Imagedisk to write a copy, popped it in and with a quick "access" it started the program and now it doesn't need the disk.

At a files-11 level there are no changes but I'll bet if I dumped that disk and did a DD: I'd find that the program hard wrote something to some sector with the serial number of my Pro. So it couldn't be installed in other places. I wonder if xhomer emulated the serial number register on the Pro/350, maybe not and that's what blew it up.

Still, it works, and it was fun to fiddle around a bit. Really nice to be honest.

CZ

On 7/28/2023 8:34 PM, Paul Koning via cctalk wrote:
I have no idea, I know nothing about IMD format.   Is there a spec?  Is it open?

        paul

On Jul 28, 2023, at 5:47 PM, Warner Losh <i...@bsdimp.com> wrote:

Paul,

Doesn't .IMD format have extra headers and metadata that means you can't just 
dd it to the raw device?

Warner

On Fri, Jul 28, 2023 at 8:09 AM Paul Koning via cctalk <cctalk@classiccmp.org 
<mailto:cctalk@classiccmp.org>> wrote:
If you want to copy raw floppy image files to the device, a simple "dd" command 
will serve, if you first use fdparm to set /dev/fd1 to 10 sectors per track.

         paul

On Jul 28, 2023, at 8:04 AM, Hans-Ulrich Hölscher via cctalk <cctalk@classiccmp.org 
<mailto:cctalk@classiccmp.org>> wrote:

Is it possible that there is a Linux version of ImageDisk?
I found a signature "IMD Linux 0.19" in the P/OS images from
ftp://computermuseum.informatik.uni-stuttgart.de/dec/pro3xx 
<ftp://computermuseum.informatik.uni-stuttgart.de/dec/pro3xx>
If so, could you please provide a source or link for the said software?
Thanks a lot!

Ulli

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