30 Mar
2002
30 Mar
'02
6:28 a.m.
On Sat, 30 Mar 2002 15:06:04 -0500 Dave McGuire <mcguire(a)neurotica.com>
writes:
On March 30, Loboyko Steve wrote:
Well yes, as a matter of fact, there are still many applications
where WW is really the best way to go. As a good example, bed-of-
nails test fixtures are typically wirewrapped. At the last
company where I was employed, I watched a re-work girl wire up
such a fixture (maybe 300 points or so) *BY HAND*, using a
manual wirewrap tool.
I brought in my squeeze-to-wrap wirewrap tool, and showed her how to
use it. This pleased her quite a bit (not to mention her supervisor).
For 500 connections or more, I'd a brung in my electric wirewrap
GUN.
Jeff
________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
http://dl.www.juno.com/get/web/.
Well, no, it isn't. Because the cost of
getting a PCB
made is less than the cost of a good electronics
technician, I think it started to die in the late
80's. And, of course, its practically impossible to WW
BGA chips, etc.
Not commonly used, or not the "latest greatest thing"? I know of
several small outfits that do lots of wire-wrapping. And I mean
*lots*. 
30 Mar
30 Mar
7:05 a.m.
On Sat, 2002-03-30 at 15:28, jeff.kaneko(a)juno.com wrote:
On Sat, 30 Mar 2002 15:06:04 -0500 Dave McGuire <mcguire(a)neurotica.com>
writes:
A few years ago I took a hardware class at IU and we built a PDP-8 using
PLAs, a bit of static ram, a few 74LS chips, and a ton of wire
wrapping. There were about 600 wires in all, but luckily it was split
across the whole semester, so it wasn't too dramatic. It was pretty
cool to see the diagnostic software work correctly on that monster. The
final exam consisted of the lab instructor breaking the machine in 3
different ways (including rewiring, putting in known bad chips,
reprogramming the PLAs, etc) and giving us 2 hours to repair the
machine.
I kind of miss that class. The 2nd semester my project was an MMU for a
6809 machine running FLEX :)
Brian
On March 30, Loboyko Steve wrote:
Well yes, as a matter of fact, there are still many applications
where WW is really the best way to go. As a good example, bed-of-
nails test fixtures are typically wirewrapped. At the last
company where I was employed, I watched a re-work girl wire up
such a fixture (maybe 300 points or so) *BY HAND*, using a
manual wirewrap tool.
I brought in my squeeze-to-wrap wirewrap tool, and showed her how to
use it. This pleased her quite a bit (not to mention her supervisor).
For 500 connections or more, I'd a brung in my electric wirewrap
GUN.
Jeff
Well, no, it isn't. Because the cost of
getting a PCB
made is less than the cost of a good electronics
technician, I think it started to die in the late
80's. And, of course, its practically impossible to WW
BGA chips, etc.
Not commonly used, or not the "latest greatest thing"? I know of
several small outfits that do lots of wire-wrapping. And I mean
*lots*.
________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
http://dl.www.juno.com/get/web/.
8:16 a.m.
New subject: 6809 / FLEX (was: "New" PDP-8)
brian wheeler wrote:
...
I kind of miss that class. The 2nd semester my
project was an MMU for a
6809 machine running FLEX :)
Any pieces left over from that time? - Once I have my PDP-11s up and
running again, I'll want to continue my self-made 6809, and maybe some
day I'll want to replace the CPU board (currently a 68A09, slightly
overclocked) by an "E" version and a 6829 MMU, but then I'll need
software. Currently, I have a self-made 4k monitor, macro assembler,
Basic, FORTH, all ported to run directly on the monitor. It has been
years since I last fed power into it, but I hope it will still work.
A real disk operating system (like FLEX or OS/9) would be great...
Andreas
8:33 a.m.
New subject: 6809 / FLEX (was: "New" PDP-8)
Andreas Freiherr wrote:
brian wheeler wrote:
...
http://www.users.cloud9.net/~stark/ flex clone?
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
I kind of miss that class. The 2nd semester my
project was an MMU for a
6809 machine running FLEX :)
Any pieces left over from that time? - Once I have my PDP-11s up and
running again, I'll want to continue my self-made 6809, and maybe some
day I'll want to replace the CPU board (currently a 68A09, slightly
overclocked) by an "E" version and a 6829 MMU, but then I'll need
software. Currently, I have a self-made 4k monitor, macro assembler,
Basic, FORTH, all ported to run directly on the monitor. It has been
years since I last fed power into it, but I hope it will still work.
A real disk operating system (like FLEX or OS/9) would be great...
Andreas 
10:42 a.m.
New subject: 6809 / FLEX (was: "New" PDP-8)
A real disk
operating system (like FLEX or OS/9) would be great...
Andreas
http://www.users.cloud9.net/~stark/ flex clone?
1:02 p.m.
New subject: 6809 / FLEX (was: "New" PDP-8)
On Sat, 2002-03-30 at 17:16, Andreas Freiherr wrote:
brian wheeler wrote:
...
Sorry, most of the parts have disappeared with time (other than the 6809
SBC that's been in progress for years and years :)
FLEX, I believe, is running loose on the net. I've seen SK*DOS for 6809
is also available
Brian
I kind of miss that class. The 2nd semester my
project was an MMU for a
6809 machine running FLEX :)
Any pieces left over from that time? - Once I have my PDP-11s up and
running again, I'll want to continue my self-made 6809, and maybe some
day I'll want to replace the CPU board (currently a 68A09, slightly
overclocked) by an "E" version and a 6829 MMU, but then I'll need
software. Currently, I have a self-made 4k monitor, macro assembler,
Basic, FORTH, all ported to run directly on the monitor. It has been
years since I last fed power into it, but I hope it will still work.
A real disk operating system (like FLEX or OS/9) would be great...
Andreas 
1:46 p.m.
New subject: 6809 / FLEX (was: "New" PDP-8)
You can find FLEX here
http://www.flexusergroup.com/
-----------------------------------------------
Michael Holley
www.swtpc.com/mholley
----- Original Message -----
From: "brian wheeler" <bdwheele(a)indiana.edu>
To: <classiccmp(a)classiccmp.org>
Sent: Saturday, March 30, 2002 7:02 PM
Subject: Re: 6809 / FLEX (was: "New" PDP-8)
FLEX, I believe, is running loose on the net. I've seen SK*DOS for 6809
is also available
Brian
31 Mar
31 Mar
3:07 a.m.
New subject: TRS-80 Model 100
Wasn't someone on the list looking for one of these a few days ago?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2013678939
--John
30 Mar
30 Mar
2:24 p.m.
New subject: FLEX OS and PERQs (was: 6809 / FLEX...)
Quothe brian wheeler, from writings of Sat, Mar 30, 2002 at 10:02:39PM -0500:
FLEX, I believe, is running loose on the net.
I've seen SK*DOS for 6809
is also available
Interesting... I wonder if the version of this for PERQs (e.g. PERQ-1,
PERQ-T2, etc. type PERQs, not the PERQ-3A or 3B systems) is on the
'net. A little over a decade ago, when gathering info. about PERQ
workstations, someone mentioned FLEX. However, finding a copy of it
seemed to be impossible even back then. Does anyone on this list know
anything about FLEX running on PERQs?
--
Copyright (C) 2001 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such
http://www.rddavis.org beliefs and to justify much human cruelty.
31 Mar
31 Mar
3:30 a.m.
New subject: FLEX OS and PERQs (was: 6809 / FLEX...)
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7:43 a.m.
Ok,
I am interested in building a computer like this, but this seems a bit
too much for me to tackle. Are there any other Classiccomputers one could
build which are far simpler and don't involve 600 wires and stuff?
Thanks,
torquil
8:20 a.m.
Torquil MacCorkle III wrote:
Ok,
I am interested in building a computer like this, but this seems a bit
too much for me to tackle. Are there any other Classiccomputers one could
build which are far simpler and don't involve 600 wires and stuff?
Thanks,
torquil
Try checking out the OTHER pdp-8 homebrew.
http://surfin.spies.com/~dgc/pdp8x/ I like it better myself as it
looks to impliment a PDP-8 better than a 6120 chip , with Real PDP-8
style I/O and is easier to get parts for. With luck you may be able be
to the art work for the PCB's. Note if you want something a bit more
classic --> http://www.spies.com/~dgc/pdp4x/ A PDP-4.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
10:57 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Ok,
I am interested in building a computer like this, but this seems a bit
too much for me to tackle. Are there any other Classiccomputers one could
build which are far simpler and don't involve 600 wires and stuff?
A few months ago I was going thru RTSI's OS-9 software archive and came
upon a file describing a single board 6809 computer.
I told the maintainer that such a files doesn't really fit within the
his archive. He agreed and removed the file.
I found a copy on an unofficial mirror of RTSI:
ftp://mirror.cocounravelled.com/OS9/OS9_6X09/PROG/Free6809.lzh
For thoes of you unable to decode an LZH file I will also post a zip
file here:
http://home.netcom.com/~tlindner/Download/Free6809.zip
I also converted the included postscript file into a PDF.
--
tim lindner tlindner(a)ix.netcom.com
"Life. Don't talk to me about life." - Marvin, the android
1:01 p.m.
New subject: 6809 single board computer (was: "New" PDP-8)
tim lindner wrote:
I also converted the included postscript file into a
PDF.
Nice but I would want a OS/9 system instead.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
31 Mar
31 Mar
12:18 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
tim lindner wrote:
> I am interested in building a computer like
this, but this seems a bit
> too much for me to tackle. Are there any other Classiccomputers one could
> build which are far simpler and don't involve 600 wires and stuff?
I keep thinking about putting together a 6809-based machine, just
for the fun of it.
http://home.netcom.com/~tlindner/Download/Free6809.zip
I also converted the included postscript file into a PDF.
Something like the CMU Free6809 board would be great, but I'd
prefer to add a CRT coltroller to get a video display. I'd
also want a keyboard interface so that the machine could
be independent of a terminal. Maybe even a disk interface
of some sort, and the AY-3-8910 sound chip, and a parallel
port, and... Oh dear, now I'm making it too complicated!
What do other people think about a small-scale 6809 board?
--
John Honniball
coredump(a)gifford.co.uk
3:44 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
John Honniball wrote:
tim lindner wrote:
Any useful CPU board needs a DISK of some sort. 64kb is cheap now days.
Eprom/flash based field programble logic could handle a IDE drive and
OS/9 level 2 bank switching.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
> I am interested in building a computer
like this, but this seems a bit
> too much for me to tackle. Are there any other Classiccomputers one could
> build which are far simpler and don't involve 600 wires and stuff?
I keep thinking about putting together a 6809-based machine, just
for the fun of it.
http://home.netcom.com/~tlindner/Download/Free6809.zip
I also converted the included postscript file into a PDF.
Something like the CMU Free6809 board would be great, but I'd
prefer to add a CRT coltroller to get a video display. I'd
also want a keyboard interface so that the machine could
be independent of a terminal. Maybe even a disk interface
of some sort, and the AY-3-8910 sound chip, and a parallel
port, and... Oh dear, now I'm making it too complicated!
What do other people think about a small-scale 6809 board? 
5:06 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
see below, plz.
Dick
----- Original Message -----
From: "John Honniball" <coredump(a)gifford.co.uk>
To: <classiccmp(a)classiccmp.org>
Sent: Sunday, March 31, 2002 7:18 AM
Subject: Re: 6809 single board computer (was: "New" PDP-8)
What amazes me is that I frequently run into oxymorons such as this one.
People want a "simple" system, yet they want a fancy video interface and
sound. Now, I'm convinced that at least 75% of the problems I've encountered
(not on my own systems, since I always omit/remove/disable it) on PC's relate
to sound. Sound consume huge amounts of bandwidth and, moreover system
resources.
The thing that made our computers of yesteryear simple and manageably small
was the fact that the console functions were provided by a terminal. If you
want to build that functionality, into your "simple" circuit, keep in mind
that the board in a typical terminal was larger than the one on which the
computer lived. Further, keep in mind that the video that simple computers
e.g. the Commodore types, (not because they're poor, though they are, or
simple, because they're not) were considerably less capable than many
terminals, and certainly much less capable than what one is accustomed to
seeing even in a cheap PC.
I built a VERY capable system last week. One with 128KB+ of memory and
considerable I/O. It does, of course, rely on a serial terminal, but it is
supported by a wide range of FREE compilers, assemblers, interpreters, etc.
The wire count was on the order of 200, and the entire design, wiring,
checkout, and software installation took under three hours. Of course, the
software's simple, since there's no mass-storage, and no file-system. Mass
storage is provided by the host system to which it's tethered by means of a
serial link. This system runs VERY fast, and is capable of even more speed,
but, since it's small, that wouldn't interest game-freaks.
Another thing. 600 wires is NOT a big, complicated circuit. 600 IC's might
be, but 600 wires is a 2-hour wiring/checkout job. Once I get set up, even
with my failing eyesight and aging memory, I still wire and continuity-check
(for both missing and undesired connections) a 600-wire circuit in less than
two hours.
If you want a small and simple circuit, supported with a decent OS and a wide
range of software, whip up a modern version of one of the classic CP/M
systems. Use SRAM, extracted from an old '486 motherboard's cache, a 20 MHz
Z80, (still avaiable at DigiKey) and substitute standard I/O peripherals for
the overpriced, underpowered devices in the Z80 family. Use an 82C55 in place
of a PIO, and an SCC2681 in place of a DART. Use a CPLD in place of the
multi-IC video circuit, or, if you're scared of PLD's, use a 6845-based
approach for the video display.
You'll have a lot more trouble getting a decent keyboard and NTSC-compabible
monitor than you will in building up a high-speed copy of, say, a Xerox 820 or
a Ferguson BigBoard-II, particularly if you leave out the stuff you don't
need. So long as you leave the mass-storage interface alone, you'll have
little trouble generating a working system.
Now, if you want a 6809-based system, you CAN build an even simpler one, but
unless you like the garbage-quality video of the 6847 or similar chips, you're
still going to be better off with a terminal. You can easily hit the 200-wire
mark with a 6809-based system. What you'd do with it is another issue, of
course.
tim lindner wrote:
> > I am interested in building a computer like this, but this seems a
bit
> > too much for me to tackle. Are there any
other Classiccomputers one
could
> build
which are far simpler and don't involve 600 wires and stuff?
I keep thinking about putting together a 6809-based machine, just
for the fun of it.
http://home.netcom.com/~tlindner/Download/Free6809.zip
I also converted the included postscript file into a PDF.
Something like the CMU Free6809 board would be great, but I'd
prefer to add a CRT coltroller to get a video display. I'd
also want a keyboard interface so that the machine could
be independent of a terminal. Maybe even a disk interface
of some sort, and the AY-3-8910 sound chip, and a parallel
port, and... Oh dear, now I'm making it too complicated!
What do other people think about a small-scale 6809 board?
--
8:49 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Wow, thanks to all for these highly interesting answers, hints and
links! - I created several bookmarks while browsing the mails and will
have to follow up during the next few weeks.
John Honniball wrote:
...
Something like the CMU Free6809 board would be great,
but I'd
prefer to add a CRT coltroller to get a video display. I'd
also want a keyboard interface so that the machine could
be independent of a terminal. Maybe even a disk interface
of some sort, and the AY-3-8910 sound chip, and a parallel
port, and... Oh dear, now I'm making it too complicated!
What do other people think about a small-scale 6809 board?
My "self-made 6809 computer" project addresses the problem of complexity
vs. functionality by composing the machine from modules. This way, you
can add another low complexity module whenever you want additional
functionality.
The core is a board housing the processor, 60k of RAM and 4k of ROM,
with 256 bytes masked out of the address space in a decoder. I developed
this idea and later heard of the I/O space used in PDP-11 architecture.
It is 4k in the PDP-11, but it is the same idea. Why shouldn't it work
for me, too? The address space is layed out in a way that should make it
easy to eventually replace this board with separate boards with CPU and
MMU on one of them, plus one or more memory modules.
A separate module has two 6850 ACIAs to provide two serial interfaces,
complete with 1488/1489 drivers/receivers and COM8116 (or something like
that) programmable baud rate generators, the board even supports
split-speed operation for applications like BTX (50 baud send, 1200 baud
receive).
To provide an easy way of configuring the hardware, I created a board
with 8*8 DIP switches. The idea is to put these switches as 8 readable
bytes at a fixed address and use them to provide initialization
parameters to the ROM based monitor program. This board also came in
handy in initial testing of the processor board: I managed to squeeze a
9 byte loop into these 64 switches that made a LED on the processor
board (address decoder output) blink when running properly.
Another board implemnents a cassette tape interface using a vanilla
analog tape recorder with a format called "Supertape" (published with
source code for numerous micros in an 80s magazine in Germany, including
the C64, Sharp PC1500, and Eltec's 6809 based Eurocom). It connects to
the MIC and EAR jacks, and it has a relay to control motor start/stop.
A video board (with capabilities slightly above a VT100) exists on paper
only, an EPROMmer on another board was partly built when time ran out.
All that stuff is still around, and I have a 19" rack mount frame that
contains the self-made power supply (with 24V ready to support 8" floppy
drives) and up to ten of my wrapped boards.
All this is based on standard components, but intentionally incompatible
to existing buses: I wanted to force myself to build everything on my
own. Once I dig down to those pieces, I may be able to provide some
pictures. Stay tuned ;-)
Andreas
9:35 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Andreas Freiherr wrote:
My "self-made 6809 computer" project
addresses the problem of complexity
vs. functionality by composing the machine from modules. This way, you
can add another low complexity module whenever you want additional
functionality.
The core is a board housing the processor, 60k of RAM and 4k of ROM,
with 256 bytes masked out of the address space in a decoder. I developed
this idea and later heard of the I/O space used in PDP-11 architecture.
It is 4k in the PDP-11, but it is the same idea. Why shouldn't it work
for me, too? The address space is layed out in a way that should make it
easy to eventually replace this board with separate boards with CPU and
MMU on one of them, plus one or more memory modules.
Better check to see how OS/9 level II is memory mapped. I think the
last 256 bytes
are common to all memory maps. Lets not forget the PDP-11 went from a 18
bit bus to I think a 22 bit bus.
A separate module has two 6850 ACIAs to provide two
serial interfaces,
complete with 1488/1489 drivers/receivers and COM8116 (or something like
that) programmable baud rate generators, the board even supports
split-speed operation for applications like BTX (50 baud send, 1200 baud
receive).
Nice. I like the maxim chip out that uses +5 volts and generates local
+-10 volts for RS232 buffers. This chip and 2 memory chips are wired to
FPGA prototype board to give me a minimal computer system. I am slowly
working on the PCB board with a limited front panel and a choice of
bootstraps: Front panel, serial port , EEPROM. The primary bootstrap at
the moment is the serial port as I download test programs from a PC to
test my CPU design. In time I will have a floppy disk and my system will
be stand alone.
To provide an easy way of configuring the hardware, I
created a board
with 8*8 DIP switches. The idea is to put these switches as 8 readable
bytes at a fixed address and use them to provide initialization
parameters to the ROM based monitor program. This board also came in
handy in initial testing of the processor board: I managed to squeeze a
9 byte loop into these 64 switches that made a LED on the processor
board (address decoder output) blink when running properly.
Neat.
A video board (with capabilities slightly above a
VT100) exists on paper
only, an EPROMmer on another board was partly built when time ran out.
All that stuff is still around, and I have a 19" rack mount frame that
contains the self-made power supply (with 24V ready to support 8" floppy
drives) and up to ten of my wrapped boards.
I would like to see that.
All this is based on standard components, but
intentionally incompatible
to existing buses: I wanted to force myself to build everything on my
own. Once I dig down to those pieces, I may be able to provide some
pictures. Stay tuned ;-)
Ok ... but the picture is a bit wavy :)
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
12:32 p.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Years ago, I built a board (using the design from a friend)
which controlled a set of 3 AY-3-8910 chips using a DRV11-C
on a pdp-11/05.
I have since lost the actual design for the circuit, but not
the breadboarded device...
I've been meaning to examine the board to try to rederive the
circuit and get it on paper again.
Megan
1 Apr
1 Apr
3:53 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
John Honniball wrote:
Something like the CMU Free6809 board would be great, but I'd
prefer to add a CRT coltroller to get a video display. I'd
also want a keyboard interface so that the machine could
be independent of a terminal. Maybe even a disk interface
of some sort, and the AY-3-8910 sound chip, and a parallel
port, and... Oh dear, now I'm making it too complicated!
My SWTP/c contains a third-party board called "the communicator" with a 6845
CRTC. Complexity is low : 6845, 2K sram, character generator and around 10 TTL
IC's. It produces a standard 80x25 output.
The same board also contains a 6821 to interface to a parallel ouput keyboard.
The floppy interface of the SWTPc is also rather simple.
Jos Dreesen
3:32 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Jos Dreesen wrote:
John Honniball wrote:
The trouble is getting a display for
it. Unless it does Monochrome or
vga output it is hard to find any monitors for anything older.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
Something like the CMU Free6809 board would be great, but I'd
prefer to add a CRT coltroller to get a video display. I'd
also want a keyboard interface so that the machine could
be independent of a terminal. Maybe even a disk interface
of some sort, and the AY-3-8910 sound chip, and a parallel
port, and... Oh dear, now I'm making it too complicated!
My SWTP/c contains a third-party board called "the communicator" with a 6845
CRTC. Complexity is low : 6845, 2K sram, character generator and around 10 TTL
IC's. It produces a standard 80x25 output.
The same board also contains a 6821 to interface to a parallel ouput keyboard.
The floppy interface of the SWTPc is also rather simple.
Jos Dreesen
4:55 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Ben Franchuk wrote:
Jos Dreesen wrote:
That's another dilemma: do I go for "authentic" composite video
at broadcast TV rates, or do I use a VGA monitor? If I choose
TV output, the quality's poor and the design only works right for
UK TV systems (625 line, 50Hz, PAL). It would need to be changed
if anyone wanted a US version (525 line, 60Hz, NTSC). But if
I go for VGA, well, that's 15 years old now, I suppose... just
seems too "modern", somehow.
What I'd really like to do is run the display in portrait mode.
--
John Honniball
coredump(a)gifford.co.uk
My SWTP/c contains a third-party board called
"the communicator" with a 6845
CRTC. Complexity is low : 6845, 2K sram, character generator and around 10 TTL
IC's. It produces a standard 80x25 output.
Jos Dreesen
The trouble is getting a display for
it. Unless it does Monochrome or
vga output it is hard to find any monitors for anything older.
5:21 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
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6:50 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Hi,
ard(a)p850ug1.demon.co.uk (Tony Duell) said:
In the UK, just about every colour TV has a SCART
socket. This gives you
composite (PAL) colour (or monochrome, of course) and analogue RGB inputs
at TV scan rates.
And sound in and out (stereo) and 3 data lines all in the worst connector
known to man ;-)
--
Cheers,
Stan Barr stanb(a)dial.pipex.com
The future was never like this!
2 Apr
2 Apr
8:10 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
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5:36 p.m.
New subject: 6809 single board computer (was: "New" PDP-8)
On Tue, 2 Apr 2002, Tony Duell wrote:
Agreed, it's a horrible connector. But there are
not that many better
choices. Separate BNCs (which _I_ would like) would be unworkable for
the j-random-public. The coax inserts in the D shell (like the 13W3)
are not much better and are very expensive. I've been seriously
looking for an easy-to-wire, good quality, RGB video connector (say 5
coax cores + logic lines) and have not found one yet.
I think AMP makes some connectors that fit your description, but they are
pricey.
-Toth
3 Apr
3 Apr
8:24 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
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6:58 p.m.
New subject: 6809 single board computer (was: "New" PDP-8)
On Wed, 3 Apr 2002, Tony Duell wrote:
Probably so. I currently have a similar problem with what I would have
expected to be a common connector...I've got a pile of 0.250" 16-14
"flag-style" fast-on (quick connect) type crimp terminals, and I still
can't find a crimper or crimp die for them that isn't in the $800 (AMP's
tool) price range. Anyone know of an inexpensive solution for these? I was
surprised to find that Paladin or Ideal didn't make a die set for these
types of terminals.
On Tue, 2 Apr
2002, Tony Duell wrote:
And I'll bet they need some expensive (very expensive) crimp tool to
fit them to the cable... Agreed, it's a horrible connector. But there
are not that many better
choices. Separate BNCs (which _I_ would like) would be unworkable for
the j-random-public. The coax inserts in the D shell (like the 13W3)
are not much better and are very expensive. I've been seriously
looking for an easy-to-wire, good quality, RGB video connector (say 5
coax cores + logic lines) and have not found one yet.
I think AMP makes some connectors that fit your description, but they are
pricey. One advantage of the SCART connector is that it can be
wired using a
normal soldering iron only. As can (real) BNCs of course...
Or just about any other quality RF connector...
-Toth
5 Apr
5 Apr
4:58 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
> > Something like the CMU Free6809 board would
be great, but I'd
> > prefer to add a CRT coltroller to get a video display. I'd
> > also want a keyboard interface so that the machine could
> > be independent of a terminal. Maybe even a disk interface
> > of some sort, and the AY-3-8910 sound chip, and a parallel
> > port, and... Oh dear, now I'm making it too complicated!
> My SWTP/c contains a third-party board called
"the communicator" with a 6845
> CRTC. Complexity is low : 6845, 2K sram, character generator and around 10 TTL
> IC's. It produces a standard 80x25 output.
> The same board also contains a 6821 to interface to a parallel ouput keyboard.
> The floppy interface of the SWTPc is also rather simple.
Speaking of 6800 components:
Does anybody still have a 6829 datasheet ?
Gruss
H.
--
VCF Europa 3.0 am 27./28. April 2002 in Muenchen
http://www.vcfe.org/
7:49 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
There's a datasheet in this databook I've been using to level the table.
Dick
----- Original Message -----
From: "Gordon Zaft" <zaft(a)azstarnet.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, April 05, 2002 12:26 PM
Subject: Re: 6809 single board computer (was: "New" PDP-8)
At 08:58 PM 4/5/2002 +0200, you wrote:
Speaking of 6800 components:
Does anybody still have a 6829 datasheet ?
I think I've got one somewhere, but I was never able to actually
FIND a 6829.
GZ
9:55 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
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1 Apr
1 Apr
4:36 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
At 07:53 PM 4/1/2002 +0200, you wrote:
John Honniball wrote:
>
>
> Something like the CMU Free6809 board would be great, but I'd
> prefer to add a CRT coltroller to get a video display. I'd
> also want a keyboard interface so that the machine could
> be independent of a terminal. Maybe even a disk interface
> of some sort, and the AY-3-8910 sound chip, and a parallel
> port, and... Oh dear, now I'm making it too complicated!
>
Pardon me if I missed the first part of this discussion. What is
the CMU Free6809 board and where/how can I get one?
GZ
5:26 a.m.
New subject: 6809 single board computer (was: "New" PDP-8)
Gordon Zaft wrote:
Pardon me if I missed the first part of this
discussion. What is
the CMU Free6809 board and where/how can I get one?
It's a 1993 design for a very simple 6809-based machine. It has a
serial
port (68B50), RAM (6264) and EPROM (2764). There's also an 8-bit latch
for
parallel output and I think you can set it up for a regular timer
interrupt. The posting that started off the discussion was from Tim
Lindner:
I found a copy on an unofficial mirror of RTSI:
ftp://mirror.cocounravelled.com/OS9/OS9_6X09/PROG/Free6809.lzh
For thoes of you unable to decode an LZH file I will also post a zip
file here:
http://home.netcom.com/~tlindner/Download/Free6809.zip
I also converted the included postscript file into a PDF.
--
tim lindner tlindner(a)ix.netcom.com
--
John Honniball
coredump(a)gifford.co.uk
8058
days inactive
8064
days old
35 comments
19 participants
participants (19)
-
Andreas.Freiherr＠Vishay.com -
ard＠p850ug1.demon.co.uk -
bdwheele＠indiana.edu -
bfranchuk＠jetnet.ab.ca -
coredump＠gifford.co.uk -
edick＠idcomm.com -
Hans.Franke＠mch20.sbs.de -
jcwren＠jcwren.com -
jeff.kaneko＠juno.com -
jhellige＠earthlink.net -
jos.mar＠bluewin.ch -
mbg＠TheWorld.com -
rdd＠rddavis.org -
stanb＠dial.pipex.com -
swtpc6800＠attbi.com -
tlindner＠ix.netcom.com -
torquil＠rockbridge.net -
tothwolf＠concentric.net -
zaft＠azstarnet.com