Contents of DEC 8" floppies

Dave Wade dave.g4ugm at
Fri Oct 16 02:21:58 CDT 2015

If memory serves me correctly PSI is the X.25 packet switching software. If
it exists I would like a copy, assuming I can get the matching version of


> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at] On Behalf Of Mark J.
> Blair
> Sent: 16 October 2015 07:15
> To: General Discussion: On-Topic and Off-Topic Posts
> <cctalk at>
> Subject: Re: Contents of DEC 8" floppies
> I have some unused 3M blank preformatted RX02 diskettes. Would those be
> usable in an RX01 drive?
> I don't know what the VAX PSI software is, but I'm guessing it must be for
> 11/780 based on the media type. I have zero use for it, but the thought of
> 11/780 bits being returned to the entropy pool disturbs me a bit. :) Can
> anybody fill me in on what these disks likely contain, to help me decide
> whether I might like to trade blank floppies for them?
> --
> Mark J. Blair, NF6X <nf6x at>

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