>Of course, MAC OS may not be so virus friendly, but I don't know about that.
>The "spare" HD would have to be a SCSI drive, right? How does the MAC go
>about
>recognizing a valid SCSI device? What has to be done to a JAZ platter to
>make
>it (the MAC) recognize it.
The MacOS is technically no more or less virus friendly than Windows. You
just don't have some of the obvious security flaws (like VBScript). But
the main reason viri aren't as rampant on the mac as they are on the PC
is simply, if you are going to write a virus you are probably trying to
hit as many computers as possible... so why write for a 5% market share
when you can write for a 90% market share.
As for recognizing SCSI devices. The Mac will recognize that a device is
connected (if you have some kind of a scsi probe, you can see that the
mac knows it is there), but depending on the device, it may or may not be
usable without additional software. In the case of tape drives, you need
software that will talk to them (like retrospect), Zip and Jaz drives
have a small extension that will let the OS see them and treat them like
high capacity floppy drives (and I think that extension may have been
rolled into OS 9.x but I'm not positive). CDs are similar, they have a
driver with the OS, (although that driver tends to only want to support
Apple approved CDs, so there are 3rd party drivers like FWB's CD Toolkit,
and Toast's CD Reader). Hard Drive support is built into the OS (low
level formating and partitioning may need 3rd party software if it isn't
an "Apple" drive). Most everything else needs 3rd party software (like
scanners, SCSI->Ethernet adaptors, etc.), but usually, the
software/drivers are free, and will come with the device (like my Umax
scanner software is available free from Umax's web site... but it only
works with their scanners)
-chris
<http://www.mythtech.net>
In a message dated 11/19/01 6:01:22 PM Pacific Standard Time, dmabry(a)mich.com
writes:
> Note to list: Should we take this private or do you all want to see it?
>
Please keep it on the list. I find it very interesting. Now if I could find
my Multibus 1 cards I could follow along. I think I have a 202 somewhere in
there.
Paxton
Astoria, OR
I don't know how much classic stuff there may be but it anyone is
interested:
> > Anyone know about this:
> >
> > Item in Canadian Business magazine, November 26, 2001, p. 11.
> >
> > "If you like poking around garage sales, you won't wanna miss
this. On Nov.
> > 28 and 29 in Ottawa, Nortel will hold the first of a series of
sales to try
> > to raise $100 million to offset some of the billions lost in the
past year.
> > Globally, it hopes to unload more than 20,000 pieces of used
equipment, some
> > for less than 20% of original cost."
I don't remember that foam as being conductive. Most conductive foams
tend to shred, those bits are not kind to the electronics.
Allison
-----Original Message-----
From: Pete Turnbull <pete(a)dunnington.u-net.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)classiccmp.org>
Date: Monday, November 19, 2001 7:49 PM
Subject: PDP-8 case
>I've been cleaning up my recently-acquired PDP-8/E, and I've had to
remove
>the plastic foam from the inside of the lid, which was fairly horrible.
> I'm not sure what best to replace it with, as the foam was in two
parts.
>
>The square(ish) area above the rear Omnibus section was ordinary brown
>high-density plastic foam, about 3/8" thick, but most of the area above
the
>front section was black conductive foam. Is this original? Was it
>supposed to protect the boards that have H851 over-the-top connectors
from
>static that might have been carried by ordinary foam? I'd have thought
the
>leakage through the conductive foam might upset some circuits.
>
>So, should I use ordinary high-density foam, or conductive?
>
>--
>Pete Peter Turnbull
> Network Manager
> University of York
I've been cleaning up my recently-acquired PDP-8/E, and I've had to remove
the plastic foam from the inside of the lid, which was fairly horrible.
I'm not sure what best to replace it with, as the foam was in two parts.
The square(ish) area above the rear Omnibus section was ordinary brown
high-density plastic foam, about 3/8" thick, but most of the area above the
front section was black conductive foam. Is this original? Was it
supposed to protect the boards that have H851 over-the-top connectors from
static that might have been carried by ordinary foam? I'd have thought the
leakage through the conductive foam might upset some circuits.
So, should I use ordinary high-density foam, or conductive?
--
Pete Peter Turnbull
Network Manager
University of York
> -----Original Message-----
> From: Richard Erlacher [mailto:edick@idcomm.com]
> There's a program (somewhere) called "FINDER," though I'm not
> convinced it's for
> the purpose of finding something. What I need to find out is
> how to find the
> FINDER. Then, of course, I have to figure out how to drive
> it ... <sigh> will
> it ever end ...
Ahh yes. :) Having been employed as a Mac-only programmer for a while,
let me assure you that there is a program called "Finder," which, in fact,
is not for finding things at all.
Finder is the Macintosh shell. Best not to confuse the users with terms
like "file manager," "shell," "interface," "front-end," "button two" or the
like. ;)
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n");
'
>Well, I hope it's documented. At least there's a NETSCRAPE for DUMMIES
>book I
>can give someone for Christmas. How difficult is it to learn this iCab? I
>don't want to have to learn it in order to teach someone else. Is it pretty
>intuitive? (that way I can answer questions on the phone and have some
>chance
>of guessing right.)
If you can browse the web, you can operate iCab. You probably will never
find a book on iCab, because it doesn't need one... it works, and it
works in the most obvious of ways (type in a url, or choose one from the
hotlist menu). It doesn't suffer from bloatware, so there is nothing to
get lost or confused with. If you can read, you can work iCab (and you
need not have to read a specific language, as it is available in a bunch
of them).
-chris
<http://www.mythtech.net>
> -----Original Message-----
> From: Richard Erlacher [mailto:edick@idcomm.com]
> If your recorded "backup" is a bit-for-bit image of the disk contents,
> transferred to and from tape, there's no interpretation of
> the contents into
> files that can take place, is there?
That's an interesting way to phrase this particular question, since the
contents are already in the form of "files" -- that is, if you ask the set
of drivers that got them to the disk in the first place. :)
I believe it's possible (though it would be slow) to interpret a bit-for-bit
image directly on a tape and extract any given file, along with attributes,
etc. In fact, any operation that would be possible on a disk, in this case,
could be handled on a tape. The clincher is that it would involve a lot of
seek/rewind/seek/etc/etc..
The underlying O/S need not even know the difference between the disk and
tape, except to know that the tape is removable (...that's not absolutely
required), and perhaps that it's incredibly slow.
The worst that would be required is a device abstraction layer or the like.
You could write one yourself which would make the tape device "look" like a
disk device, for systems which don't have such a thing, and that would be
enough.
How would you like to be able to mount your backup tape, and use a
file-manager on it? ;)
> The Microsoft Backup that came with DOS, (a) never really was
> a backup, but,
> rather, was just a copy, and (b) never worked together with
> its "restore"
> function. Under DOS, copies were adequate, since the context
> didn't matter.
If you mean that it didn't store attributes, or that sort of thing, you may
be right (never paid attention.) On the other hand, you're also right to
say that it wouldn't particularly matter under MS-DOS.
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n");
'
Anyone know of a source for data sheets and app notes for
the SCB68430 DMA
controller? I couldn't find anything via Google.
It's available on http:\\www.freetradezone.com . There are two versions
of the sheet, D0194930.pdf is the 1988 version, D0191623.pdf is the
earlier 1996 version.
Lee.
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