>From: "Jay West" <jwest at classiccmp.org>
>
>Eric wrote...
>> Does that software do some magic that can't be done with cat, cp, or dd?
>Nope, not at all.
>
>Was just looking for something more high level, and perhaps something that
>would read the data into a file, and let you edit it with something akin to
>a hex editor, then punch back out, etc. I figured there was already apps to
>do this... but in a pinch I have done just what you said.
>
>Jay
>
>
>
Hi Jay
In DOS, I use XTREE. It has a HEX edit mode. It doesn't
allow inserting, only replacing.
Dwight
>From: "Eric Smith" <eric at brouhaha.com>
>
>Dwight wrote:
>> I just saw someone auctioning a motorola
>> MC4004. I suspect that some will think it is
>> an Intel 4004 but I guess they'll soon
>> find out that it is just a simple cmos part.
>
>Even if they did expect a simple CMOS part, they'll still be
>disappointed, because the MC4004 is a TTL part!
>
>Motorola had a 4000 series of TTL parts before the SN7400 series
>became established. So when they introduced their equivalent
>of the RCA CD4000 series CMOS, they called it the MC14000 series.
>
>I can't find any reference to a CD4004 at the moment, but if there
>was one, and Motorola made an equivalent, they would have called it
>an MC14004.
>
>I've seen this problem occur more often when someone wants a CD4024
>and gets an MC4024, or vice versa. The former is seven stage binary
>counter, but the latter is a dual VCO.
>
>Eric
>
>
Yep, my error. I forgot the 14xxx as both you and William
pointed out.
Dwight
How about using a later version of DOS, and having it masquerade
as 3.3 if need be? The version being reported to a program by the
OS can be changed on an individual program basis for compatibility
purpose, so you might remove the 512 file limit without too much
hassles. I beleive MS DOS 5 and up have this facility. I certainly
remember using it for some AT&T STARLAN drivers way back...
Michel Adam
micheladam at theedge dot ca
----- Original Message -----
From: Vintage Computer Festival <vcf at siconic.com>
Date: Tuesday, March 29, 2005 8:22 am
Subject: Re: Obscure DOS question
> On Mon, 28 Mar 2005, Jim Leonard wrote:
>
> > Vintage Computer Festival wrote:
> > > MS-DOS 3.3 has a limit of 512 entries in the root directory.
> I have a
> > > need to put more than this.
> >
> > I seem to remember that the limit is actually 224.
>
> It's definitely 512 on DOS 3.3.
>
> > > Another question:
> > >
> > > When using the SUBST command in MS-DOS, you cannot aparently
> substitute> > the C: drive. I seem to recall that MS-DOS 6.0
> allowed this, although I
> > > might be confusing that with the ability of LANtastic to
> redirect the C:
> > > drive to a network drive.
> >
> > Checking 6.22 right here... works fine (I did "subst d: c:\").
> So yes,
> > you can.
>
> Hmm, cool.
>
> > > At any rate, what I'm trying to do is overcome the limit of
> 512 file
> > > entries in an MS-DOS 3.3 root directory.
> >
> > SUBST won't help you do this unless you don't use a floppy at
> all, like:
> >
> > subst a: c:\temp
> >
> > ...which works fine.
>
> I'm not using floppies at all. This is with hard disks.
>
> > My question is: Why?
>
> I'm restoring files from VHS backup tapes. The files were all
> originallystored and backed up from the root directory. On the
> tapes I used to test
> my process, none had more than 512 files archived. The backup
> softwareonly restores *to the same exact drive and path* that the
> files were
> archived from (in this case C:\). I'm running into some tapes
> that have
> more than 512 files backed up frm the root directory. These were done
> back in the 1980s. I can't figure out how they did it, but there they
> are.
>
> Once a backup is made, you cannot add to the backup, so that's not how
> they did it.
>
> Anyway, what I am trying to do so that we don't have to make two
> runs on
> each tape (each tape takes 2 hours to dump) is to re-map the C:
> drive to a
> directory so that we can overcome the 512 entry limit.
>
> --
>
> Sellam Ismail Vintage
> Computer Festival
> -------------------------------------------------------------------
> -----------
> International Man of Intrigue and Danger
> http://www.vintage.org
> [ Old computing resources for business || Buy/Sell/Trade Vintage
> Computers ]
> [ and academia at www.VintageTech.com || at
> http://marketplace.vintage.org ]
>
>
>
Hi all:
I just got an old //e with a Sup'R'Mod II RF modulator - I hooked it up as
expected to the TV (my 3 year old loves Moon Patrol in mono, so I figured
he'll love it more in color ;) but no joy - anyone out there got docs for
this? A scan would be lovely, mail would be fine and compensated. Let me
know, thx!
Regards,
Gord
In 1982, Radio Shack sold it for $2495 + tax. There are many things that it can't do that more modern computers will, but it will do word processing, database, spreadsheet, communication, educational programs, games, etc, but not the internet.
>
> From: Gene Ehrich <gehrich at tampabay.rr.com>
> Date: 2005/03/28 Mon PM 02:36:33 EST
> To: cctalk at classiccmp.org
> Subject: TRS-80 Model III ???????
>
> I have the opportunity to purchase a TRS-80 Model III computer. It looks
> very good, has two 5-1/4" floppies and (she says) worked the last time it
> was turned on.
>
> She is asking $50.
>
> Is that a fair price?
>
> What should it be worth?
>
>
>> Erm, no the serial/parallel conversion isn't common to both ports
>> on the chip.
>
>Hmm... curious. I'd downloaded the datasheet for the chip and it wasn't
>clear either way so figured I'd try the inverter trick.
>
>> This implies that some buffer chip that feeds to 8530 is
>> faulty.
>
>If they are totally seperate channels (no common internal buffering
>first, say) then yep, it looks that way. There's no buffers immediately
>by the serial logic, so I'll look further afield.
Even though there is (obviously) separate parallel/serial shift registers
inside the chip for each channel, I am assuming that the parallel data bus
enters the chip through only one set of pins - it is entirely possible that
the input gate, or some internal buffer common to both channels has failed.
An easy test would be to trigger on chip select, scope the affected data
bit on the bus inputs, and write patterns to the chip with the affected
bit in both hign and low positions - it should be very easy to determine if
the data bit is making it to the chip or not. If yes, replace the device,
if no, move to the next upstream component and repeat the test (all the while
keeping triggering on the device chip select). It should be a very easy matter
to identify the defective device in this fashion - no need to remove anything
other than whatever device is defective.
Even if you don't have an extender board, it is far easier to tack a lead
on to points you want to test than to be removing and replacing entire devices
in the hope of being lucky. -- Just MHO.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
Can anyone recommend some Classic Computer related things to do near
Bristol UK? I'm flying in from Australia in early April for some
training but I'll have at least one weekend to kill so any suggestions
of things to see near Bristol (I'll be without car which will be an
interestingly enough concept in itself!).
At the risk of upsetting the OT Gods, if anyone in the UK can recommend
a cheapish, reliable ISP that I can dial into during the stay, a
personal e-mail with some detail would be appreciated - the company
approved hotels don't have broadband available.
Huw Davies | e-mail: Huw.Davies at kerberos.davies.net.au
Melbourne | "If soccer was meant to be played in the
Australia | air, the sky would be painted green"
>From: "Bill Girnius" <thedm at sunflower.com>
>
>It's not entirely out of the question, after all, how many of you have the
>knowledge of metalurgy to make any metal tool from say... the Bronze age, or
>Iron, or make gun powder, sure you know what's in it, but can you obtain the
>raw materials, and build the contraption that they used to make it?
Let me see, volcanic vent for the yellow stuff. Fireplace
for the black stuff.
Need some horses and some soil with a high potassium content
for the white stuff.
Nothing real difficult. I think in a pinch ( with my car ) I
could find these things.
Still, it is true that as technology gets more complicated,
it takes quite a few people with knowledge in specific areas
to create the complete item.
Dwight
Some time ago, I sent the following message to the
list regarding a collection of Byte Magazines that I
was considering getting rid of.
A couple of people did express interest in receiving
some of them but I didn't pursue the matter at the
time due to workload. However, I'd now like to clear
my shelves so if you are interested could you please
let me know ...
See below for a list of the copies available.
Best regards,
Roger
--- Roger Bisson <roger161uk at yahoo.co.uk> wrote:
> Date: Sat, 22 Nov 2003 11:52:16 +0000 (GMT)
> From: Roger Bisson <roger161uk at yahoo.co.uk>
> Subject: Byte Magazines
> To: cctalk at classiccmp.org
>
> I have the following issues of Byte Magazine.
>
> Unfortunately, they take up a fair amount of space
> on
> my office shelves and, as a result, I am
> contemplating
> getting rid of them: despite them containing loads
> of
> good information, I just don't have time for it
> anymore :-(
>
> Anyway, individual copies are available if anybody
> has
> a collection with missing copies and, I am happy to
> send larger numbers of copies to anybody interested
> in
> them, the only provision is that postage and packing
> must be paid, at cost (or thereabouts), by the
> receiver.
>
> If I receive numerous contacts for specific copies
> of
> magazines, or for specific series I may place the
> magazine or series on eBay or another auction site
> as
> a means to resolving the contention, proceeds going
> to
> a local old folks home.
>
> All are in good condition, although clearly some are
> in better condition than others. I herewith
> enumerate
> all copies, as I do not have a complete set -
> certain
> months/years are missing.
>
> January 1988
> December 1989
> May 1989
> September 1989
> February 1990
> March 1990
> April 1990
> June 1990
> January 1991
> April 1991
> July-December 1991
> January-November 1992
> January-December 1993 (except February, July and
> October)
> January-December 1994
> January-December 1995 (except for August)
> January-December 1996
> February-December 1997
> January-April 1998
> July 1998
>
> Best regards,
>
> Roger
>
>
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