[HECnet] Future problems?

[Johnny Billquist]

On 2016-07-16 00:25, John Wilson wrote:
> From: <Paul_Koning at Dell.com>
> Date: Fri, 15 Jul 2016 18:17:11 +0000
>>> I didn't even know that there was a DOS-11 disk format, but thinking about
>>> it, it would seem obvious there should be one.
>>
>> Yes, there is, different from everything else as far as I know.  I think
>> the DECtape format is faintly related.  Some DOS manuals may give some
>> clues, but I've never looked into it or had any exposure to DOS disk file
>> system internals.
>
> Yes it's in the manuals, and the (commented) source code to PUTR.COM
> has some explanation too.  I believe the DECtape and disk formats are
> the same, except that the MFD1 is located at block 1 on disks and
> block 64. (^O100) on DECtapes.
>
> The DOS/BATCH disk format is also used by XXDP before V2.  XXDP V2 has
> its own similar (but different) format.

Interesting, as XXDP V2 have a format that appears to be pretty much the 
same as RT-11. (Including FLX being able to read it, more or less.)

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol