DEC RX50 disks with mystery content

[Vincent Slyngstad]

On 3/31/2021 10:20 AM, David Schmidt via cctech wrote:
> Hello, DEC enthusiasts -
> 
> I've got some 5-1/4" disks here that purport to be from a DECmate 
> (probably II) and may have data offloaded from a bigger system.  But the 
> disks don't have any recognizable trace of a filesystem on them; just 
> vast swathes of data that looks like this:
> 
> https://drive.google.com/file/d/12EO4Lg1Uh7NvCUJksHQ2AUiK550OX7UJ/view?usp=sharing 
> 
> 
> It seems to be a pattern of a near-zero byte followed by some other 
> byte.  It's like they're storing 12-bit words in 16 bits or something. 
> Does anyone recognize this sort of thing, just eyeballing it?

IT does have a PDP-8ish look.  I'd be able to do more if it were machine 
readable, rather than just a PNG image, or better yet if the whole 
floppy's content were available.

	Vince