26 Nov
2001
26 Nov
'01
7:50 a.m.
On Mon, 26 Nov 2001, Jim Battle wrote:
True, but Rich's emulator is of an Altair -- one
with an 8080 in it. ZCPR2
& 3 were Z80-only affairs, I believe.
If he is running a true emulator, I would presume that he was running
CP/M-1.4 would he not? If that is so, is it not true that user areas
did not come into play until CP/M-2.x?
- don
I recently picked up Richard Conn's ZCPR book for
$10, but I haven't yet
had time to do more than page through it quickly. It looks like it was an
interesting system; the author was obviously influenced by unix.
At 08:33 AM 11/26/01 +0100, Sipke de Wal wrote:
ZCPR2 & 3 (CP/M extensions) even allowed
for 32 USER levels (0 .. 31)
Sipke de Wal
-------------------------------------------------
http://xgistor.ath.cx
-------------------------------------------------
----- Original Message -----
From: Jim Battle <frustum(a)pacbell.net>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, November 26, 2001 7:51 AM
Subject: Re: Inaccessible CP/M programs in Altair32
-----
Jim Battle == frustum(a)pacbell.net
Good point --
to flesh it out a bit more, there could be up to 16 different "user" areas
on the disk, which go from 0 to 15. Files were tagged with a nibble
indicating which user area the file belonged to.
To change user areas, type:
USER 1
to change to user area 1. By default you are in user 0. Changing to each
user area and typing "dir" to see if anything is there is a drag. To find
out which, if any, user areas have active files, type:
STAT USR:
and it responds with something like:
Active User: 0
Active Files: 0 1
to indicate you are currently in user 0 area and that user areas 0 and 1
have files in them.
(confirmed on *my* CP/M emulator!)
At 10:18 PM 11/25/01 -0800, you wrote:
>I'm not an expert in Altair CP/M but I do remember one other aspect. It
>wasn't password protection but I do remember the concept of differnt user
>#'s. It wasn't complicated but somthing like user #'s 1-8. Once you
>were that user I seem to remember only the files belonging to that user
>showing up...
>
>Might be a dead end... Just a thought...
>
>George Rachor
>
>=========================================================
>George L. Rachor Jr. george(a)rachors.com
>Hillsboro, Oregon http://rachors.com
>United States of America Amateur Radio : KD7DCX
>
>On Sun, 25 Nov 2001, Jim Battle wrote:
>
> > At 10:06 PM 11/25/01 -0500, you wrote:
> > >Hi:
> > >
> > > I'm making progress with using CP/M under Altair32, but I
have
> > > one newbie
> > >question since I don't have much experience with CP/M.
> > >
> > > The disk image I have shows one program in the directory,
> > > STAT.COM. Running
> > >STAT tells me that there is about 167k free (on a 330k disk). Looking
> at the
> > >disk image file with a hex file editor reveals that there's more
> programs on
> > >the disk.
> > >
> > > I seem to remember something about password protection on
a
CP/M
> > > disk. How
> > >do I get around this so that I can see what else is on this image?
> >
> > It isn't password protection. Files can be marked as "system"
files, so
> > that they don't show up when you do
a "DIR". I think "STAT *.*
$DIR" will
> > > revert all hidden files back to normal.
> > >
> > > -----
> > > Jim Battle == frustum(a)pacbell.net
> > >
> > >
>
> -----
> Jim Battle == frustum(a)pacbell.net
>