Where I worked in the early 80s had a reference printout that gave the
conversion between Burroughs part numbers and the industry standard
parts. Thought some of that series were Farchild microCTL chips used
in systems like the B6700. Sorry, don't have access to the printout as
it would have been dumped years ago.
Regards,
Garry
Tony Duell wrote:
>
> ...The one that's hard to get is
> the System Zero. This looks like an inverse torx (The screw head is
> male, with slots round the outside, the driver is female), but it's
> designed so that nothing but the right tool will get it out (the sides
> of the screwhead taper slightly so that you can't grab it with pliers or
> a Mole Wrench (self-locking wrench), for example).
>
> Yes, I have a set of those tools -- one of my EPROM programmer [1] is
> assembled with them, for what reason %deity only knows.
>
> [1] A thing called a Ferret. It's a combined EPROM programmer, breakout
> box, RS232 / current loop / centronics converter, Z80 computer, strip
> printer, etc in a portable case.
Nintendo also uses them on their Super NES / Famicom Deck housing and game
cartridges (not sure about the original NES/Famicom). They managed to pretty
much defeat their purpose by placing them in "wells" in the plastic so you
can wedge a pair of correctly sized tweezers between the well wall and the
screw head and apply enough traction to get them out. Been there, done that
(to investigate how to replace coin cell for save-game feature).
--
Arno Kletzander
Stud. Hilfskraft Informatik Sammlung Erlangen
www.iser.uni-erlangen.de
NEU: Bis zu 10 GB Speicher für e-mails & Dateien!
1 GB bereits bei GMX FreeMail http://www.gmx.net/de/go/mail
Great! Thanks, Ben.
Had not found this one. "coco" is a good term to include in
the search :-) Will continue looking, but if no cheaper source
turns up, I think I will spend the $31 out of curiousity to see
the actual performance it claims.
The page says that the 63C09 runs cooler than the 6809.
I can confirm that the 68B09 at 1 MHz is warm, but I heard from
Vince that the 6809 at 1 MHz gets quite warm!
tnx,
- Henk.
> -----Original Message-----
> From: cctalk-bounces(a)classiccmp.org
> [mailto:cctalk-bounces@classiccmp.org]On Behalf Of ben franchuk
> Sent: donderdag 26 augustus 2004 8:01
> To: On-Topic and Off-Topic Posts
> Subject: Re: dos electronics software?
>
>
> Gooijen H wrote:
> > Hmm, I tried to post this yesterday ... probably something
> went wrong..
> > I am looking for a 63C09E or 63B09E. Anybody knows where I
> can buy it??
> > I found a source in Australia, but that is the 63B09. The
> suffix "E"
> > is important, it is the *external* clock version, as used
> in the Core
> > Board of the Blinkenlight project (40 pin DIL case).
> > I have a PDP-8/e simulation running on th Core board, but could use
> > a performance increase. Upgrading to the Motorola "B" parts
> will allow
> > to double the clock frequency, but the Hitachi 63B09 is even faster,
> > as it does many 6809 instructions in less cycles.
> > Interested in the sim? Check my 'Homebrew PDP-11' page,
> the link there
> > is "spin off" ...
>
> You really don't want to know the price!
> you better Sit down.
>
>
> Sit
> ...
>
>
> sit
>
>
> ...
>
> sit
>
>
> ...
> Now beg for the doggy snack.
> Oh Sorry. :-) Here is the link.
> http://www.cloud9tech.com/index.html
> The price is about $32 US each.
>
> > - Henk,
>
> PS. If you ever get a good single board 63C09 computer design
> thats runs OS/9 level two let me know. I have always wanted a
> real computer and the COCO never quite made it.
>
>
Hmm, I tried to post this yesterday ... probably something went wrong..
I am looking for a 63C09E or 63B09E. Anybody knows where I can buy it??
I found a source in Australia, but that is the 63B09. The suffix "E"
is important, it is the *external* clock version, as used in the Core
Board of the Blinkenlight project (40 pin DIL case).
I have a PDP-8/e simulation running on th Core board, but could use
a performance increase. Upgrading to the Motorola "B" parts will allow
to double the clock frequency, but the Hitachi 63B09 is even faster,
as it does many 6809 instructions in less cycles.
Interested in the sim? Check my 'Homebrew PDP-11' page, the link there
is "spin off" ...
- Henk,
www.pdp-11.nl
> -----Original Message-----
> From: cctalk-bounces(a)classiccmp.org
> [mailto:cctalk-bounces@classiccmp.org]On Behalf Of ben franchuk
> Sent: donderdag 26 augustus 2004 5:21
> To: On-Topic and Off-Topic Posts
> Subject: Re: dos electronics software?
>
>
> Ethan Dicks wrote:
> > On Wed, Aug 25, 2004 at 03:17:34PM -0400, Roger Merchberger wrote:
> >
> >>Also, if you're looking for something "more updated"
> there's always the
> >>Hitachi 63C09 - it's 4 Mhz, and has more registers, a
> 16-bit integer
> >>multiply (with a 32-bit result) and clock for clock is
> faster than the 6809.
> >
> >
> > Is it pin-compatible with the 6809?
> >
> > -ethan
> >
>
> Off hand I think it is pin compatable since it was a 6809
> replacement part.
> The gota is the hardware designers upgraded the core
> instruction set to
> switch instruction sets from the 'Motorola 6809' to the
> 'Enhanced 6809' mode
> with a mode changing instuction.Since they had a license to sell only
> 6809 parts
> this information was never documented other than hardware
> hackers on the
> internet.
> More information can be found here.
> http://www.concentric.net/~Alxevans/index.html
>
>
Rumor has it that David V. Corbin may have mentioned these words:
> >>> > The free software from Atmel & Lattice are geared around
> >>> the newer FPGAs that you could build a 6809 out of....
>
>Has anyone actually done this? The reason I ask is I developed a bunh of
>code around the 6809 architecture. Some of it would be worth resurrecting IF
>I code get a "micro-codable" implementation with some other features...Just
>an idea...or maybe the dementia is surfacing....
Yes... Off the top of my head:
http://www.inicore.com/
They made an FPGA-based 40Mhz 6809... (they say it'll do 10Mips!)
Otay, memory served, but here's a page directly to the info:
http://www.inicore.com/core_lib/inicpu.htm
[[ I have *no* idea on cost -- just stumbled across it during a google
search a couple of years ago. ]]
Also, if you're looking for something "more updated" there's always the
Hitachi 63C09 - it's 4 Mhz, and has more registers, a 16-bit integer
multiply (with a 32-bit result) and clock for clock is faster than the 6809.
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger --- sysadmin, Iceberg Computers
zmerch(a)30below.com
Hi! I am a .signature virus. Copy me into your .signature to join in!
to re-iterate, the separate sections I am proposing let the emulator do this very easily. Embed the format and the data together as pyhsical information and then the matter of extracting a file for emulation becomes difficult and not universal.
best regards, Steve Thatcher
-----Original Message-----
From: Vintage Computer Festival <vcf(a)siconic.com>
Sent: Aug 11, 2004 2:30 PM
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org>
Subject: Re: Let's develop an open-source media archive standard
On Wed, 11 Aug 2004, Sean 'Captain Napalm' Conner wrote:
> It was thus said that the Great Vintage Computer Festival once stated:
> >
> > HOWEVER, this makes it very difficult to use the imagefile on an emulator.
> > To use the floppy disk example again, if the emulator wants Track 14
> > Sector 8 (or Block 417) but it has not been explicitly laid out in the
> > imagefile because it was originally zeroes, then the emulator, if poorly
> > designed, may crap out.
>
> Are you trying to create an archive format, or a format that is to be used
> by emulators? I say skip the emulators and concentrate on archival
> purposes. An emulator can then use the archive format to create a disk
> image in whatever internal format it requires.
This is exactly what I have in mind. It's an archive format that can be
used by emulators. The emulator would only need a front end that can
interpret the archive image into an internal data structure that it can
use.
> Don't complicate the problem.
We're not trying to at least ;)
> -spc (And don't try to become everything for everybody ... )
Not trying to do that, but we are trying to make it a format for
everything (or at least as much as possible that makes sense).
--
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 ]
Thanks Tony - I have swabbed it with Isopropyl alcohol - I assume that's the same thing.
They're a real bugger as you have to pull the drives out to get to the heads because the things are so big.
I figured an alignment disk was needed but was fishing a bit too as I suspect an 8" one is hard to find.
Another theory I had was that I figured that Drive 0 has probably had a lot more use so I might try swapping them around if I can sort out the jumpers (if they have any) and see if I can get it to boot.
+++++++++++++++++++
Kevin Parker
Web Services Manager
WorkCover Corporation
p: 08 8233 2548
e: webmaster(a)workcover.com
w: www.workcover.com
+++++++++++++++++++
-----Original Message-----
From: cctech-bounces(a)classiccmp.org
[mailto:cctech-bounces@classiccmp.org]On Behalf Of Tony Duell
Sent: Wednesday, 25 August 2004 9:08 AM
To: cctalk(a)classiccmp.org
Subject: Re: Drive alignment
>
> I have a TRS80 Model 12 that's been upgraded to a 16B (with two 8"
> slim-line floppies). I am trying to copy some discs but not having much
> joy.
>
> One theroy is the media is cactus.
>
> The other theory is that following some reading about these machines,
> because of the size of the drives they tended to get out of alignment
> regularly. How do I check alignment on the old classics.
Take a known-good blank 8" disk and format it on one of your drives. If
you can then read/write to it in that drive without problems, then the
only thing that could be wrong with the drive is the alignment. If it
fails, then you have other problems with the drive.
To check the alignment properly, you need a CE (Catseye) disk and a
'scope. Basically the disk has a special patern recorded on it (this
cannot be copied using a normal drive, BTW) and you look at the outputs
of the read amplifier with a the 'scope. You see a pattern of 2 lobes on
the 'scope screen -- if they're the same height the head is alighed, if
one is larger than the other it's offset from the correct position.
It's not hard to do, but the Catseye disk is expensive (I am still
looking for the 8" and 3" ones, BTW...).
My experience suggests that head radial alignment is not normally a
problem unless you've replaced parts of the drive. More likely is a dirty
head (you have cleaned it, right? With a cotton bud dipped in
propan-2-ol, not one of those useless cleaning disks), a worn-out head,
other mechnaicl problems, or an electronic failure.
-tony
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