Right at the end of the latest Egg Money advert, is that a TRS Model 3 or
Model 4?
This link should be viewable for a while:
http://www.visit4info.com/preview-flash.cfm?vm=0&type=2&adid=41634
Also, a previous ad has featured a CBM PET shaped "mockuter" (mock
computer), with the tape deck replaced with an oversized trackball:
http://www.youtube.com/watch?v=M0nZwyua8Ao
Cheers,
Ade.
--
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--- Adrian Graham <witchy at binarydinosaurs.co.uk> wr
ote:
> On 6/2/07 21:55, "aliensrcooluk at yahoo.co.uk"
> <aliensrcooluk at yahoo.co.uk>
> wrote:
>
> > I remember CD caddies :)
> >
> > I recall back at secondary school in my first
> > year there (year 7 for UK'ers), in 1990/1, that
> > the new computer in the library used CD's
> > which were in see through plastic.
> > Essentially the "CD" of the time was like
> > floppy discs - the writable media (medium?)
> > was encased in protective plastic shell.
>
> Sounds like the Philips 1x speed CD that was used
by
> DEC as the RRD40. It
> took standard CD-ROMs but they were inserted in a
> plastic shell because the
> drive had no tray or any other means of supporting
> the CD.
>
> My own RRD40 caddies are 250 miles away but I've g
ot
> a drive at work :)
>
> In the meanwhile, look towards the bottom of this
> page:
>
> http://home.claranet.nl/users/pb0aia/cm/sroom.html
>
> --
> Adrian/Witchy
> Binary Dinosaurs creator/curator
> Www.binarydinosaurs.co.uk - the UK's biggest priva
te
> home computer
> collection?
>
Thanks.
Yeah, that looks about right. So why were the
caddies ditched?? Was it simply cost, or that
the CD drives themselves were improved?
Regards,
Andrew D. Burton
aliensrcooluk at yahoo.co.uk
--- arcarlini at iee.org wrote:
> aliensrcooluk at yahoo.co.uk wrote:
>
> > Yeah, me three.
> >
> > I'd like to know what the difference is between
> > a writable (write/rewrite) CD/DVD and
> > ordinary ones.
> > How do you "write-protect" a CD/DVD??
>
> The "ordinary" ones are pressed at a factory. A
> glass
> master (I _think_ it is glass) is produced and is
> used to press the CD. As long as it is assembled
> correctly (and especially, it seems, sealed around
> the
> edges) then that it likely to be the most stable
> form of CD. Unless something gets inside and start
s
> to eat the aluminium, then it should be fine.
> (Obviously
> I'm excluding physical damage, etc.)
>
> For +/-R media the laser burns a pit in a special
> layer
> in the disc to create a pit. For the +/-RW forms t
he
> laser causes a
> reversible phase change to create an optical pit
> (heating it
> up again causes the change to reverse, hence
> blanking the pit).
>
> >From the point of view of the user, the +/-R form
s
> cannot be
> erased once they are written, although you can wri
te
> a new
> table of contents (TOC), so that it looks like you
> have
> overwritten the old data, but in fact it is still
> there
> There are programs which will dig it out for you.
I
> supposed
> theoretically you could blank a CD-R by burning
> every possible
> pit, but if you are security conscious, just break
> it (or
> shred it). When you "finalise" a DVD-R it can no
> longer be
> written to. I _think_ that all that has happened i
s
> that
> some bits have been set on a reserved area of the
> medium
> to tell the drive not to write to it any more.
> Unless
> you have a rogue drive (or maybe rogue software)
> then this
> is probably as safe as a floppy write-protect tab.
>
> The +/-RW forms can be fully erased and reused
> (1000x is the
> claim, yeah right!). Regardless of whether these a
re
> more or
> less stable than -R, they are clearly of limited u
se
> for
> long term archiving, since there is always a risk
> that they
> will get blanked and reused for "something more
> important".
>
> There's also DVD-RAM, but I don't think that's ver
y
> important
> for our purposes.
>
> Then there is the whole +/- debate, but these days
> that has
> mostly died away. You ?20 (high-end :-)) DVD
> rewriter will
> write to
> CD-R,CD-RW,DVD-R,DVD+R,DVD-RW,DVD+RW,DVD-RAM
> and dual layer DVD-R (~8GB, but the disks are abou
t
> 5x the
> cost of a DVD-R).
>
> Antonio
>
Thanks for that.
Regards,
Andrew D. Burton
aliensrcooluk at yahoo.co.uk
While the subject of *removing* diskette labels has cropped up before
(for example,
http://www.classiccmp.org/pipermail/cctech/2002-October/003294.html), I
don't think I've seen any discussion on where to obtain *new* ones. I'm
setting up a PCjr system for a friend and would like to prepare a nice
set of software for him, but I have no labels. A while ago, I tried
generic Avery mailing labels that I thought would work, but after a few
months the adhesive dried up and they all fell off. Any suggestions?
Newly-created sources preferred; I tried some old labels in "new old
stock" I have but after 20 years they're dead on arrival; they don't
stick as soon as you pull them off their backing.
On a related note, what's the best adhesive to re-apply labels that have
fallen off? I have some commercial software (games, etc.) where the
label is historically relevant and I'd like to re-attach it.
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
Help our electronic games project: http://www.mobygames.com/
Or check out some trippy MindCandy at http://www.mindcandydvd.com/
A child borne of the home computer wars: http://trixter.wordpress.com/
>
> Jay West wrote:
> > Al wrote...
> >> I have a HUGE softspot in my heart for the TRS-80
Model I, having
> >> purchased a 16k, Level I unit in December of
1978. A unit, I still own
> >> today,
> > That's the one system I don't have in my
collection that I'd really like
> > to - a TRS-80 model I with tandy monitor and
perhaps the expansion unit.
> > I never owned one, but a lot of my friends in the
late 70's timeframe
> > did and we always fought about if my Apple ][+ was
better than their
> > TRS80 :)
> >
> > Jay
>
> That must have been a short argument. I used both a
lot in high school.
> The model I was unreliable in the extreme. The
model III's were much
> better in that regard.
And for the counter-argument, I have a model 1 that
I've had from new,
and which has never failed me. COnversely I had
nothing but trouble with
the Apple ][, a design which i feel is marginal at
best!
-snip-
-tony
************************
Interesting. Most people seem to say nice things about
the Apple ]['s design. I'd love to hear some informed
bashing ;) . Could you elaborate some about the
machine's short comings from your perspective?
My biggest annoyance is being unable to determine what
state the softswitches are in at any given time. I
also understand the cassette interface left something
to be desired (I've always enjoyed the luxury of
floppies). Beyond that, the machine just oozes quirky
charm in my eyes.
- Liam Busey (an Apple ][/ ][+ fan)
____________________________________________________________________________________
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I've got a CBM 8032 that powers up "fine", but the screen is filled with "!" on
every other character position. When some letters are repeated, they can change,
i.e. "nnnn" becomes "onon" which seems like (without checking the ASCII charts)
that the "n" and "!" are ORed to become the "o". Anyone have any ideas what the
problem might be? Most of the schematics I have are buried someplace, so I
thought I would start here.
>> "Personal papers" aren't on paper any more, if they exist
>> at all they are directories full of email.
> Why is this a "huge issue"? My father made xerox copies of his
> important papers; I make regular backups. What's changed?
The volatility of the preservation medium, future ability to recover
a document in obscure formats, and the sheer volume of digital content
vs saved paper.
Is everything you're 'backing up' checksummed? How do you KNOW
it hasn't already been corrupted?
> As strange as it seems, I think we lost a lot of personal
> correspondence when hard disks became the rule on PC systems.
This is a huge issue amongst archivists.
"Personal papers" aren't on paper any more, if they exist
at all they are directories full of email.
On the CBM 8032, I downloaded the schematics from
http://www.zimmers.net/anonftp/pub/cbm/pet/, and that helped a lot. Tony's
comment about odd and even made things start to make sense. My only question
there was did the count start at zero or one :). It appears that the count does
start at zero (even). I have some doubts about the schematics since D3 is the
one line (on a clear screen) that seems to be always high, and that doesn't
correspond to bit 0 always on. BUT it appears that the 4114 at C4 is bad, and
I'll scope it out before removing it and putting in a socket.
BTW, what is the difference (if any) between the 8032 with the wide plastic
label, and the 8032 with the two plastic logos? The one on the right says "CMB
Model 8032" and the one of the left says "Commodore". I have both models, but
this one is the one with the two plastic logos.
And many thanks for the help on copying a floppy on the Mac 128. That worked
like a champ. I did find that putting an icon into the trash didn't eject the
disk for some reason. However the flower E worked great.
Thanks!
I have a Mac 128 and I want to duplicate the system disk. Probably a stupid
question, but how do you make a copy of a disk on that computer (single internal
disk drive.) Needless to say, I am not a Mac person. Thanks!
