16 Jul
2016
16 Jul
'16
1:09 a.m.
On 2016-07-16 00:25, John Wilson wrote:
From: <Paul_Koning at Dell.com>
Date: Fri, 15 Jul 2016 18:17:11 +0000
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
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.