On Fri, 21 Jun 2002, Ethan Dicks wrote:
The problem is that for DEC RX50s, they are _not_ 360K
or 1200K 5.25"
disks... they are single-sided, 10-sectors of 512 bytes per track, 80
tracks. They can be read in an ordinary PC high-density drive, but
they aren't the usual Windoze format. If they were, I'd just use 'dd'
as you suggest.
I _hate_ it when dd won't work! And it won't, at least in Linux --
there's apparently no device which reads/writes 80/10/512 on 5.25"
floppy. I can't find anything for NetBSD, either.
However, I did find this --
http://www.conknet.com/~w_kranz/WTELEDSK.HTM
a TeleDisk clone that "should" compile in Linux, but didn't. I
didn't
try hard....
It really irks me that I have to keep a DOS box around for stuff like
this. Atari .msa disks, the TeleDisk files all over the web, all seem
to be used mostly by Linux/Unix-savvy people, but there aren't any
PC-Unix utilities.
I guess maybe now I have a burning drive (pun intended) to learn C....
So... again... who here knows how to make 400KB images from real RX50s
that emulators will like? I have a wad of Ultrix 32m and MicroVMS
diskettes I'd like to spool off, in addition to a small quantity of
RT-11.
Ooohhh.... Ultrix! Will it run on KA630 or KA655? The PUPS version
of 32M is like 11/780 or older or something.
Erzatz-11 eval says you can read-write RX50 on a HD 5.25" drive. I
expect that emulators, or at least E-11, will like those....
Doc