Multi-platform distribution format (Was: Backups [was

Johnny Billquist bqt at
Tue Sep 22 08:56:26 CDT 2015

On 2015-09-22 06:58, tony duell wrote:
>> HOWEVER, while the PDP-11 is still unable to perform an
>> LLF on an RX50 when an RQDX3 is present, it is possible
>> to perform an LLF on a floppy in an RX33.  Does that still
>> seem compatible with your explanation?
> Yes, that confused me too. The RQDX3 is clearly capable of
> LLFing a floppy. So either (unlikely) DEC specifically do
> not allow the right set of commands to LLF an RX50 or
> (more likely) that bit of software you have doesn't do it
> (although others can) possibly so as not to cut into DEC's
> sales of pre-formatted disks.
> Sorry I don't know more, the RQDXs are too modern for me.

I don't know for sure, but I really think it's the RQDX3 that explicitly 
refuses to format the RX50.

If I just had an RX33 I could easily test this, as I can easily patch 
the RSX FMT program to treat an RX50 as an RX33...


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