[Info-vax] OS design, was: Re: [OT] Wirth style languages, was: Re: Obscure Ada compiler vendors?

[glen herrmannsfeldt]

Johnny Billquist <bqt at softjar.se> wrote:

(snip, I wrote)
>> I was going to say FILES-11, but it seems that the ODS
>> are variations of FILES-11.

>> I was remembering writing floppy disks from VAX with
>> floppy disk drives.
 
> FILES-11 is a rather generic term. ODS is the more stringent definition. 
> But they are sometimes used rather interchangeably.
 
> Both VMS and RSX implements FILES-11. However, RSX only do ODS-1 (well, 
> sortof), while VMS on VAXen could understand ODS-1 but preferred ODS-2, 
> and Alpha and Itanium deal with ODS-2 or ODS-5.

But which ones are used on floppy disks. (Especially 25 years ago.)
 
> There might be a more official definition of what makes up "FILES-11" 
> and "ODS-n" around, that I'm unaware of...

I used to read/write both FILES-11 and RT-11 format floppies on VAX.

-- glen