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  • Category: Computers
  • Founded: Jan 17, 2005
  • Language: English
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#28903 From: William Donzelli <wdonzelli@...>
Date: Thu Jan 10, 2013 7:07 pm
Subject: Re: InfoAge power update
toober00
Send Email Send Email
 
> He's working with professional power engineers, FEMA, and JCP&L. He
> doesn't need me to point out the obvious.

OK, thanks.

--
Will

#28904 From: "Brian Schenkenberger, VAXman-" <VAXman@...>
Date: Thu Jan 10, 2013 7:16 pm
Subject: Re: InfoAge power update
VAXman@...
Send Email Send Email
 
William Donzelli <wdonzelli@...> writes:

>> He's working with professional power engineers, FEMA, and JCP&L. He >
>doesn't need me to point out the obvious.
>
>OK, thanks.

FWIW, the transformer outside my home which blew up during Sandy has not
yet been replaced as well as others in the area.  I think we are all run-
ning on borrowed time.

--
VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

Well I speak to machines with the voice of humanity.

#28905 From: "mloewen16823" <mloewen@...>
Date: Thu Jan 10, 2013 7:26 pm
Subject: VCF-E 9.0 exhibit options
mloewen16823
Send Email Send Email
 
I'm soliciting opinions from the group about my choice of exhibit for this
year's VCF-E.  I had initially been talking to Dave McGuire and some others
about bringing a VAX 4000/300 and participating in a VAX cluster, but I'm
considering other options.  For instance, I've had at least two people request
that I bring my HP mini again.  While I dislike the idea of rehashing an
exhibit, the HP 2109E system is now more fully configured, with a second 264x
terminal and a 9-track tape drive and cabinet.  Maybe I can get the 8" floppy
drives working.

    The real reason I'm leaning away from the VAX is that I'm not very familiar
with it, and I'm not sure I have enough time between now and VCF to get up to
speed.  At least with the HP, most of the work is done.  Yes, I realize the
amount of DEC brainpower that will be present to assist, but I like to feel
useful, too. :-)

    Of course, there are always the Kaypros, TRS-80s, Morrow and NorthStar
systems yet to be exhibited.  I like to be different, though.

    So, what do you think?

Mike Loewen 		 mloewen@...
Old Technology       http://sturgeon.css.psu.edu/~mloewen/Oldtech/

#28906 From: "Brian Schenkenberger, VAXman-" <VAXman@...>
Date: Thu Jan 10, 2013 7:32 pm
Subject: RE: VCF-E 9.0 exhibit options
VAXman@...
Send Email Send Email
 
"mloewen16823" <mloewen@...> writes:

>   I'm soliciting opinions from the group about my choice of exhibit for
>th= is year's VCF-E.  I had initially been talking to Dave McGuire and
>some oth= ers about bringing a VAX 4000/300 and participating in a VAX
>cluster, but I= 'm considering other options.  For instance, I've had at
>least two people r= equest that I bring my HP mini again.  While I
>dislike the idea of rehashin= g an exhibit, the HP 2109E system is now
>more fully configured, with a seco= nd 264x terminal and a 9-track tape
>drive and cabinet.  Maybe I can get the=  8" floppy drives working.
>
>   The real reason I'm leaning away from the VAX is that I'm not very
>famil= iar with it, and I'm not sure I have enough time between now and
>VCF to get=  up to speed.  At least with the HP, most of the work is
>done.  Yes, I real= ize the amount of DEC brainpower that will be
>present to assist, but I like=  to feel useful, too. :-)
>
>   Of course, there are always the Kaypros, TRS-80s, Morrow and
>NorthStar s= ystems yet to be exhibited.  I like to be different,
>though.
>
>   So, what do you think?

Bring both! :)

--
VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

Well I speak to machines with the voice of humanity.

#28907 From: Mike Loewen <mloewen@...>
Date: Thu Jan 10, 2013 7:37 pm
Subject: RE: VCF-E 9.0 exhibit options
mloewen16823
Send Email Send Email
 
On Thu, 10 Jan 2013, Brian Schenkenberger, VAXman- wrote:

> "mloewen16823" <mloewen@...> writes:
>
>> ...
>>   The real reason I'm leaning away from the VAX is that I'm not very
>> famil= iar with it, and I'm not sure I have enough time between now and
>> VCF to get=  up to speed.  At least with the HP, most of the work is
>> done.  Yes, I real= ize the amount of DEC brainpower that will be
>> present to assist, but I like=  to feel useful, too. :-)
>>
>> ...
>>   So, what do you think?
>
> Bring both! :)

     Available transportation is limitied to a single minicomputer.


Mike Loewen 		 mloewen@...
Old Technology       http://sturgeon.css.psu.edu/~mloewen/Oldtech/

#28908 From: William Donzelli <wdonzelli@...>
Date: Thu Jan 10, 2013 7:40 pm
Subject: Re: VCF-E 9.0 exhibit options
toober00
Send Email Send Email
 
> So, what do you think?

If you are going to bring a DEC machine, better make it a HiNote.

--
Will

#28909 From: Dave McGuire <Mcguire@...>
Date: Thu Jan 10, 2013 7:41 pm
Subject: Re: VCF-E 9.0 exhibit options
purringdave
Send Email Send Email
 
On 01/10/2013 02:37 PM, Mike Loewen wrote:
>>>   The real reason I'm leaning away from the VAX is that I'm not very
>>> famil= iar with it, and I'm not sure I have enough time between now and
>>> VCF to get=  up to speed.  At least with the HP, most of the work is
>>> done.  Yes, I real= ize the amount of DEC brainpower that will be
>>> present to assist, but I like=  to feel useful, too. :-)
>>>
>>> ...
>>>   So, what do you think?
>>
>> Bring both! :)
>
>     Available transportation is limitied to a single minicomputer.

   Then I'll bring an additional VAX, similar to yours, and set it up in
your exhibit area.  That way, you can have the best of both worlds and
won't miss out on any of the fun.  I'll be in a truck anyway.  What do
you think?

                   -Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

#28910 From: Dave McGuire <Mcguire@...>
Date: Thu Jan 10, 2013 7:42 pm
Subject: Re: VCF-E 9.0 exhibit options
purringdave
Send Email Send Email
 
On 01/10/2013 02:26 PM, mloewen16823 wrote:
> I'm soliciting opinions from the group about my choice of exhibit for
> this year's VCF-E.  I had initially been talking to Dave McGuire and
> some others about bringing a VAX 4000/300 and participating in a VAX
> cluster, but I'm considering other options.  For instance, I've had
> at least two people request that I bring my HP mini again.  While I
> dislike the idea of rehashing an exhibit, the HP 2109E system is now
> more fully configured, with a second 264x terminal and a 9-track tape
> drive and cabinet.  Maybe I can get the 8" floppy drives working.
>
> The real reason I'm leaning away from the VAX is that I'm not very
> familiar with it, and I'm not sure I have enough time between now and
> VCF to get up to speed.  At least with the HP, most of the work is
> done.  Yes, I realize the amount of DEC brainpower that will be
> present to assist, but I like to feel useful, too. :-)
>
> Of course, there are always the Kaypros, TRS-80s, Morrow and
> NorthStar systems yet to be exhibited.  I like to be different,
> though.
>
> So, what do you think?

   I'd welcome the 2109E, and wouldn't consider it a rehash due to its
recent expansion.  Multiple terminals and the 9-track drive make it a
VERY different system, exhibit-wise, and I think showing the evolution
of the system as you build it up is also good.

                -Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

#28911 From: "Brian Schenkenberger, VAXman-" <VAXman@...>
Date: Thu Jan 10, 2013 7:45 pm
Subject: Re: VCF-E 9.0 exhibit options
VAXman@...
Send Email Send Email
 
William Donzelli <wdonzelli@...> writes:

>--EpKxBtrGaGRPawJBIri7ZJlrZfsdq9aiSpPWGdq Content-Type: text/plain;
>charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
>
>> So, what do you think?
>
>If you are going to bring a DEC machine, better make it a HiNote.

Why???  I have a d|i|g|i|t|a|l HiNote VP with the complete docking station
(VP765) if you would like to see one.  It is, of course, running Linux! ;)

--
VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

Well I speak to machines with the voice of humanity.

#28912 From: joshbensadon
Date: Thu Jan 10, 2013 8:31 pm
Subject: Re: InfoAge power update
joshbensadon
 
I think the Vintage Computer Museum needs a nice steam powered generator.

How many MIPs can you get from 1 cord of wood?

:) J

#28913 From: "Jeff Jonas" <jeff_s_jonas@...>
Date: Thu Jan 10, 2013 9:43 pm
Subject: NCR chips?
jeff_s_jonas
Send Email Send Email
 
Does anyone have NCR chip databooks?

1) I have a NCR panel with fluorescent displays
http://ferretronix.com/tech/vfd/
the NCR chips:
NCR 6-51146
NCR 6-51055
NCR 6-51056
NCR 6-51057

2) 34c227 is a 48 pin DIP. Some sort of microcontroller.
Of course, Google only finds the parts-pimps,
no real specs.

thanks!
-- jeffj

#28914 From: "Jeff Jonas" <jeff_s_jonas@...>
Date: Thu Jan 10, 2013 9:53 pm
Subject: Re: InfoAge power update
jeff_s_jonas
Send Email Send Email
 
--- In midatlanticretro@yahoogroups.com, joshbensadon  wrote:
> I think the Vintage Computer Museum needs a nice
> steam powered generator.

We'll have to collaborate with Dan Lieb for that:
the shipwreck museum collabortes with the
Pine Creek Railroad, so a steam locomotive is POSSIBLE
but we'd have to put it on a treadmill to generate electricity.

> How many MIPs can you get from 1 cord of wood?

Ack! The smoke and ash and soot!
Check vintage-ads for the clear advantages of
clean burning ANTHRICITE coal!
I'm unusure if we can get samples from the
Anthricite Museum in PA.

Even then, a cluster of new low-power microcontrollers
will beat big-iron for MIPS-per-watt :-/

*shudders* at the thought of a heap-o-Arduinos
powered by 9v batteries.

#28915 From: "jack99rubin" <j@...>
Date: Thu Jan 10, 2013 10:21 pm
Subject: Re: VCF-E 9.0 exhibit options
jack99rubin
Send Email Send Email
 
I'd like to see that tape drive spinning. I think I still have pieces for one of
the hinges for the cabinet.

Jack

--- In midatlanticretro@yahoogroups.com, "mloewen16823"  wrote:
>
>    I'm soliciting opinions from the group about my choice of exhibit for this
year's VCF-E.  I had initially been talking to Dave McGuire and some others
about bringing a VAX 4000/300 and participating in a VAX cluster, but I'm
considering other options.  For instance, I've had at least two people request
that I bring my HP mini again.  While I dislike the idea of rehashing an
exhibit, the HP 2109E system is now more fully configured, with a second 264x
terminal and a 9-track tape drive and cabinet.  Maybe I can get the 8" floppy
drives working.
>
>    The real reason I'm leaning away from the VAX is that I'm not very familiar
with it, and I'm not sure I have enough time between now and VCF to get up to
speed.  At least with the HP, most of the work is done.  Yes, I realize the
amount of DEC brainpower that will be present to assist, but I like to feel
useful, too. :-)
>
>    Of course, there are always the Kaypros, TRS-80s, Morrow and NorthStar
systems yet to be exhibited.  I like to be different, though.
>
>    So, what do you think?
>
> Mike Loewen 		 mloewen@...
> Old Technology       http://sturgeon.css.psu.edu/~mloewen/Oldtech/
>

#28916 From: "B. Degnan" <billdeg@...>
Date: Fri Jan 11, 2013 3:14 am
Subject: re: NCR chips?
billdeg
Send Email Send Email
 
I have three.

MOS integrated circuits 7/76
linear integrated circuits 1973
TTL Databook 1976

Most National chips start with LM or DM (AH, AM, MM, ... etc)

Not one chip in the three databooks (mid 70's) has any chips that start
with "NCR".  What else is on the chips?
Bill

-------- Original Message --------
> From: "Jeff Jonas" <jeff_s_jonas@...>
> Sent: Thursday, January 10, 2013 5:12 PM
> To: midatlanticretro@yahoogroups.com
> Subject: [midatlanticretro] NCR chips?
>
> Does anyone have NCR chip databooks?
>
> 1) I have a NCR panel with fluorescent displays
> http://ferretronix.com/tech/vfd/
> the NCR chips:
> NCR 6-51146
> NCR 6-51055
> NCR 6-51056
> NCR 6-51057
>
> 2) 34c227 is a 48 pin DIP. Some sort of microcontroller.
> Of course, Google only finds the parts-pimps,
> no real specs.
>
> thanks!
> -- jeffj
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

#28917 From: William Donzelli <wdonzelli@...>
Date: Fri Jan 11, 2013 3:18 am
Subject: Re: NCR chips?
toober00
Send Email Send Email
 
> Not one chip in the three databooks (mid 70's) has any chips that start
> with "NCR". What else is on the chips?

NCR is National Cash Register. The purple chips look very mid-1970s
Motorola. They probably made them for NCR.

--
Will

#28918 From: "B. Degnan" <billdeg@...>
Date: Fri Jan 11, 2013 4:06 am
Subject: Re: NCR chips?
billdeg
Send Email Send Email
 
-------- Original Message --------
> From: "William Donzelli" <wdonzelli@...>
> Sent: Thursday, January 10, 2013 10:45 PM
> To: midatlanticretro@yahoogroups.com
> Subject: Re: [midatlanticretro] NCR chips?
>
> > Not one chip in the three databooks (mid 70's) has any chips that
start
> > with "NCR". What else is on the chips?
>
> NCR is National Cash Register. The purple chips look very mid-1970s
> Motorola. They probably made them for NCR.
>

Whoa I totally missed that one.  I will check the Motorola books.  Duh me.

Bill

#28919 From: "B. Degnan" <billdeg@...>
Date: Fri Jan 11, 2013 4:56 am
Subject: Re: NCR chips?
billdeg
Send Email Send Email
 
> 1) I have a NCR panel with fluorescent displays
> http://ferretronix.com/tech/vfd/
> the NCR chips:
> NCR 6-51146
> NCR 6-51055
> NCR 6-51056
> NCR 6-51057
>
> 2) 34c227 is a 48 pin DIP. Some sort of microcontroller.
> Of course, Google only finds the parts-pimps,
> no real specs.
> >
> > > Not one chip in the three databooks (mid 70's) has any chips that
> start
> > > with "NCR". What else is on the chips?
> >
> > NCR is National Cash Register. The purple chips look very mid-1970s
> > Motorola. They probably made them for NCR.
> >
>
> Whoa I totally missed that one.  I will check the Motorola books.  Duh
me.
>
> Bill
>

Replying to myself.  I could not find anything in the Motorola books, but I
am guessing now that these are equivalent part numbers, not original
Motorola part numbers.  Sorry I can't help.
bd

#28920 From: joshbensadon
Date: Fri Jan 11, 2013 12:57 pm
Subject: OT: Steam power
joshbensadon
 
--- In midatlanticretro@yahoogroups.com, "Jeff Jonas"  wrote:
>
> --- In midatlanticretro@yahoogroups.com, joshbensadon  wrote:
> > I think the Vintage Computer Museum needs a nice
> > steam powered generator.
>
> Pine Creek Railroad, so a steam locomotive is POSSIBLE
> but we'd have to put it on a treadmill to generate electricity.

A treadmill for a steam locomotive will cost more than a power transformer. 
Perhaps someone can find an old steam tractor?

> Check vintage-ads for the clear advantages of
> clean burning ANTHRICITE coal!

*vintage* ads rule.

> Even then, a cluster of new low-power microcontrollers
> will beat big-iron for MIPS-per-watt :-/
>
> *shudders* at the thought of a heap-o-Arduinos
> powered by 9v batteries.

LoL, perhaps the group will accept a bunch of COSMAC 1802 Membership cards being
ran from batteries?

PS. The only draw back to steam power is that there will need to be a fireman to
keep shoveling the coal.  I guess that's what the "new guy" is for?  Consider it
an initiation rite of passage.

#28921 From: "Mike" <mike@...>
Date: Fri Jan 11, 2013 2:06 pm
Subject: SCELBI PCBs on order
mwillega
Send Email Send Email
 
I excited to announce that I've ordered a batch of reproduction SCELBI PCBs. 
This will enable  building of a batch of reproduction SCELBI 8Hs.  There is
still a lot of work to do before a basic system is operational,  but this is a
major milestone in an effort that was started in earnest about 15 months ago.

Once the basic 8H is working there is untold opportunities for follow on
projects, including;

1) reproduction chassis - although it looks bare bones, I'm pretty sure the
original production chassis were custom built to SCELBI specifications and not
modified off the shelf chassis.
2) cassette interface
3) TTY interface
4) oscilloscope interface
5) SCELBI 8B (4 additional/different PCBs required)
6) 2 varieties of power supplies

regards,
Mike Willegal

#28922 From: "Mike" <mike@...>
Date: Fri Jan 11, 2013 2:35 pm
Subject: Re: OT: Steam power
mwillega
Send Email Send Email
 
--- In midatlanticretro@yahoogroups.com, joshbensadon  wrote:
>
> --- In midatlanticretro@yahoogroups.com, "Jeff Jonas"  wrote:
> >
> > --- In midatlanticretro@yahoogroups.com, joshbensadon  wrote:
> > > I think the Vintage Computer Museum needs a nice
> > > steam powered generator.
> >
> > Pine Creek Railroad, so a steam locomotive is POSSIBLE
> > but we'd have to put it on a treadmill to generate electricity.
>
> A treadmill for a steam locomotive will cost more than a power transformer. 
Perhaps someone can find an old steam tractor?

stationary steam engines with power take offs (PTO) have been around since long
before the American Civil War  - too bad there isn't a steam group at info age 
:-)

Mike W.

>
> > Check vintage-ads for the clear advantages of
> > clean burning ANTHRICITE coal!
>
> *vintage* ads rule.
>
> > Even then, a cluster of new low-power microcontrollers
> > will beat big-iron for MIPS-per-watt :-/
> >
> > *shudders* at the thought of a heap-o-Arduinos
> > powered by 9v batteries.
>
> LoL, perhaps the group will accept a bunch of COSMAC 1802 Membership cards
being ran from batteries?
>
> PS. The only draw back to steam power is that there will need to be a fireman
to keep shoveling the coal.  I guess that's what the "new guy" is for?  Consider
it an initiation rite of passage.
>

#28923 From: "B. Degnan" <billdeg@...>
Date: Fri Jan 11, 2013 2:57 pm
Subject: re: SCELBI PCBs on order
billdeg
Send Email Send Email
 
Sounds great.  I can't wait to see one.

-------- Original Message --------
> From: "Mike" <mike@...>
> Sent: Friday, January 11, 2013 9:34 AM
> To: midatlanticretro@yahoogroups.com
> Subject: [midatlanticretro] SCELBI PCBs on order
>
> I excited to announce that I've ordered a batch of reproduction SCELBI
PCBs.  This will enable  building of a batch of reproduction SCELBI 8Hs.
There is still a lot of work to do before a basic system is operational,
but this is a major milestone in an effort that was started in earnest
about 15 months ago.
>
> Once the basic 8H is working there is untold opportunities for follow on
projects, including;
>
> 1) reproduction chassis - although it looks bare bones, I'm pretty sure
the original production chassis were custom built to SCELBI specifications
and not modified off the shelf chassis.
> 2) cassette interface
> 3) TTY interface
> 4) oscilloscope interface
> 5) SCELBI 8B (4 additional/different PCBs required)
> 6) 2 varieties of power supplies
>
> regards,
> Mike Willegal
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

#28924 From: joshbensadon
Date: Fri Jan 11, 2013 3:27 pm
Subject: Re: SCELBI PCBs on order
joshbensadon
 
--- In midatlanticretro@yahoogroups.com, "Mike"  wrote:
>
> I excited to announce that I've ordered a batch of reproduction SCELBI PCBs. 
This will enable  building of a batch of reproduction SCELBI 8Hs.  There is
still a lot of work to do before a basic system is operational,  but this is a
major milestone in an effort that was started in earnest about 15 months ago.

Put me down for 1 set.  Sounds like a project I'd like to do.

#28925 From: Dave McGuire <Mcguire@...>
Date: Fri Jan 11, 2013 5:32 pm
Subject: Re: SCELBI PCBs on order
purringdave
Send Email Send Email
 
On 01/11/2013 09:06 AM, Mike wrote:
> I excited to announce that I've ordered a batch of reproduction SCELBI PCBs. 
This will enable  building of a batch of reproduction SCELBI 8Hs.  There is
still a lot of work to do before a basic system is operational,  but this is a
major milestone in an effort that was started in earnest about 15 months ago.
>
> Once the basic 8H is working there is untold opportunities for follow on
projects, including;
>
> 1) reproduction chassis - although it looks bare bones, I'm pretty sure the
original production chassis were custom built to SCELBI specifications and not
modified off the shelf chassis.
> 2) cassette interface
> 3) TTY interface
> 4) oscilloscope interface
> 5) SCELBI 8B (4 additional/different PCBs required)
> 6) 2 varieties of power supplies

   Please put me down for a set!

               -Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

#28926 From: "B. Degnan" <billdeg@...>
Date: Fri Jan 11, 2013 6:27 pm
Subject: Re: SCELBI PCBs on order
billdeg
Send Email Send Email
 
>
> On 01/11/2013 09:06 AM, Mike wrote:
> > I excited to announce that I've ordered a batch of reproduction SCELBI
PCBs.  This will enable  building of a batch of reproduction SCELBI 8Hs.
There is still a lot of work to do before a basic system is operational,
but this is a major milestone in an effort that was started in earnest
about 15 months ago.
> >
> > Once the basic 8H is working there is untold opportunities for follow
on projects, including;
> >
> > 1) reproduction chassis - although it looks bare bones, I'm pretty sure
the original production chassis were custom built to SCELBI specifications
and not modified off the shelf chassis.
> > 2) cassette interface
> > 3) TTY interface
> > 4) oscilloscope interface
> > 5) SCELBI 8B (4 additional/different PCBs required)
> > 6) 2 varieties of power supplies
>
>   Please put me down for a set!
>


Me, too boss!

Bill Degnan

#28927 From: "Mike" <mike@...>
Date: Sat Jan 12, 2013 12:41 am
Subject: Re: SCELBI PCBs on order
mwillega
Send Email Send Email
 
awesome,

I should have boards in about 2 weeks - still have to find many of the parts,
but I think I have the hard ones (8008 and 1101) -  most of the rest is pretty
conventional 74xx series.  The original units used a zener in a funky package
for over voltage protection, witch I doubt can be found very easily, but there
are modern equivalents.  watch my blog as details unfold

Also I've promised Evan that MARCH will get a set of bare boards for free.  It
will be up to MARCH to find the parts and build it up into a museum piece.

www.willegal.net/blog

regards,
Mike W.

--- In midatlanticretro@yahoogroups.com, "B. Degnan"  wrote:
>
>
> >
> > On 01/11/2013 09:06 AM, Mike wrote:
> > > I excited to announce that I've ordered a batch of reproduction SCELBI
> PCBs.  This will enable  building of a batch of reproduction SCELBI 8Hs.
> There is still a lot of work to do before a basic system is operational,
> but this is a major milestone in an effort that was started in earnest
> about 15 months ago.
> > >
> > > Once the basic 8H is working there is untold opportunities for follow
> on projects, including;
> > >
> > > 1) reproduction chassis - although it looks bare bones, I'm pretty sure
> the original production chassis were custom built to SCELBI specifications
> and not modified off the shelf chassis.
> > > 2) cassette interface
> > > 3) TTY interface
> > > 4) oscilloscope interface
> > > 5) SCELBI 8B (4 additional/different PCBs required)
> > > 6) 2 varieties of power supplies
> >
> >   Please put me down for a set!
> >
>
>
> Me, too boss!
>
> Bill Degnan
>

#28928 From: "John" <jaevans@...>
Date: Sat Jan 12, 2013 12:53 am
Subject: Re: SCELBI PCBs on order
n0hj
Send Email Send Email
 
Aren't some of the components near unobtainium ?  BTW, I have a set of Mark-8
boars here waiting for the opportune moment to begin that project.

John


--- In midatlanticretro@yahoogroups.com, "B. Degnan"  wrote:
>
>
> >
> > On 01/11/2013 09:06 AM, Mike wrote:
> > > I excited to announce that I've ordered a batch of reproduction SCELBI
> PCBs.  This will enable  building of a batch of reproduction SCELBI 8Hs.
> There is still a lot of work to do before a basic system is operational,
> but this is a major milestone in an effort that was started in earnest
> about 15 months ago.
...

#28929 From: "Mike" <mike@...>
Date: Sat Jan 12, 2013 1:06 am
Subject: Re: SCELBI PCBs on order
mwillega
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the 8008 is most expensive, but not really that hard to find -  I think the
prices people are getting on ebay are way to high as Intel made them into the
80's. American Microsemiconductor has almost 5000 1101 SRAMs and are asking
under $4 each.  The rest of the TTL stuff is basic 74xx - which are available
from unicorn electronics and other sources.

regards,
Mike W.

--- In midatlanticretro@yahoogroups.com, "John"  wrote:
>
> Aren't some of the components near unobtainium ?  BTW, I have a set of Mark-8
boars here waiting for the opportune moment to begin that project.
>
> John
>
>
> --- In midatlanticretro@yahoogroups.com, "B. Degnan"  wrote:
> >
> >
> > >
> > > On 01/11/2013 09:06 AM, Mike wrote:
> > > > I excited to announce that I've ordered a batch of reproduction SCELBI
> > PCBs.  This will enable  building of a batch of reproduction SCELBI 8Hs.
> > There is still a lot of work to do before a basic system is operational,
> > but this is a major milestone in an effort that was started in earnest
> > about 15 months ago.
> ...
>

#28930 From: "hornbetw" <hornbetw@...>
Date: Sat Jan 12, 2013 1:42 am
Subject: Re: SCELBI PCBs on order
hornbetw
Send Email Send Email
 
If MARCH needs volunteers to help build their set, I can help out.

Tom


--- In midatlanticretro@yahoogroups.com, "Mike"  wrote:
>
> awesome,
>
> I should have boards in about 2 weeks - still have to find many of the parts,
but I think I have the hard ones (8008 and 1101) -  most of the rest is pretty
conventional 74xx series.  The original units used a zener in a funky package
for over voltage protection, witch I doubt can be found very easily, but there
are modern equivalents.  watch my blog as details unfold
>
> Also I've promised Evan that MARCH will get a set of bare boards for free.  It
will be up to MARCH to find the parts and build it up into a museum piece.
>
> www.willegal.net/blog
>
> regards,
> Mike W.
>
> --- In midatlanticretro@yahoogroups.com, "B. Degnan"  wrote:
> >
> >
> > >
> > > On 01/11/2013 09:06 AM, Mike wrote:
> > > > I excited to announce that I've ordered a batch of reproduction SCELBI
> > PCBs.  This will enable  building of a batch of reproduction SCELBI 8Hs.
> > There is still a lot of work to do before a basic system is operational,
> > but this is a major milestone in an effort that was started in earnest
> > about 15 months ago.
> > > >
> > > > Once the basic 8H is working there is untold opportunities for follow
> > on projects, including;
> > > >
> > > > 1) reproduction chassis - although it looks bare bones, I'm pretty sure
> > the original production chassis were custom built to SCELBI specifications
> > and not modified off the shelf chassis.
> > > > 2) cassette interface
> > > > 3) TTY interface
> > > > 4) oscilloscope interface
> > > > 5) SCELBI 8B (4 additional/different PCBs required)
> > > > 6) 2 varieties of power supplies
> > >
> > >   Please put me down for a set!
> > >
> >
> >
> > Me, too boss!
> >
> > Bill Degnan
> >
>

#28931 From: "DougCrawford" <touchetek@...>
Date: Sat Jan 12, 2013 4:22 pm
Subject: Early Microcomputer Software... Wow!
dougmemphis
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So I was poking around on Intel 4004 and came across materials
on the first 4004 implementation, the 141-PF calculator.

http://www.4004.com/2009/Busicom-141PF-Calculator_asm_rel-1-0-1.txt
(Explore 4004.com if you haven't)

I was surprised to find that the software written as a interpreter; an engine
written in Intel 4004 machine code that processed a set of calculator pseudo
instructions. I really expected a brute-force native machine code
implementation.  I suspect I highly underestimate the software engineering
concepts that existed before the microprocessor, which would have yielded such a
sophisticated implementation right from the get-go on the 4004.

Hope you find this interesting also.
There's some very cool stuff being done with visual simulators of old processors
too, which is how I got down this path.
The Visual 6502 project is linked from 4004.com near the top,
if you haven't seen it, its worth a look.

#28932 From: David Gesswein <djg@...>
Date: Sat Jan 12, 2013 5:42 pm
Subject: Re: VCF-E 9.0 exhibit options
dgesswein
Send Email Send Email
 
On Thu, Jan 10, 2013 at 07:26:32PM -0000, mloewen16823 wrote:
>    I'm soliciting opinions from the group about my choice of exhibit for
> this year's VCF-E.
>
I've been thinking some about that also. Since Dave McGuire is likely
bringing the big stuff I would do something different this year. I'll
go for our family computing history. Have the slide rule, mechanical
adding machine, books with tables to show parents computing. Then funky hand
calculator that doesn't do floating point, OSI computer, & TI professional
PC with IBM compatibility board for my early computing history. 3B1
for my wifes. Not that our computing is that special but the progression
is a reasonable show of how it progressed. Sorry, can't bring the
UNIVAC my mother did some work with.

Mechanical adding machines are Sears and Underwood Sundstrand 10140. Not
the most fancy but the Sundstrand can do shift and add multiply.

If anybody thinks its a bad idea let me know (conflicts with your exhibit?)

The other options would be card reader with a PDP-8 showing batch programming.
DEC had mark sense cards where you could do your basic programs with a #2
pencil on punch cards then run them on THE computer. It could also do
normal punched cards.

The last which is risky for completing is an 8/L with third party LINCtape.
Since I haven't done anything with it yet other than collect some needed
repair parts who knows how long it will take.

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