On 2015-12-18 5:00 PM, Brent Hilpert wrote:
On 2015-Dec-16, at 10:26 PM, Mike Ross wrote:
On Wed, Dec 16, 2015 at 8:01 PM, Brent Hilpert wrote:
First crack can be picked up here:
http://www.cs.ubc.ca/~hilpert/tmp/WIOSelectric.pdf
There are a few areas and pins I couldn't discern from
On 2015-Dec-18, at 12:13 AM, Mike Stein wrote:
> - Original Message -
> From: "Brent Hilpert"
> Sent: Wednesday, December 16, 2015 2:01 AM
>
> First crack can be picked up here:
> http://www.cs.ubc.ca/~hilpert/tmp/WIOSelectric.pdf
>
> - Reply -
>
> Mind telling me/us what softw
On 2015-Dec-16, at 10:26 PM, Mike Ross wrote:
> On Wed, Dec 16, 2015 at 8:01 PM, Brent Hilpert wrote:
>>
>> First crack can be picked up here:
>>http://www.cs.ubc.ca/~hilpert/tmp/WIOSelectric.pdf
>>
>> There are a few areas and pins I couldn't discern from the photos.
>> Mostly around U1
- Original Message -
From: "Brent Hilpert"
Sent: Wednesday, December 16, 2015 2:01 AM
On 2015-Dec-15, at 6:21 PM, Mike Ross wrote:
>
> I have taken Brent up on that :-)
>
First crack can be picked up here:
http://www.cs.ubc.ca/~hilpert/tmp/WIOSelectric.pdf
- Reply -
Awesome
On Tue, 15 Dec 2015, Mike Ross wrote:
On Tue, Dec 15, 2015 at 4:59 AM, tony duell wrote:
This board does not look that complicated and all the ICs have known
numbers on them (mostly TTL logic). If it were mine I'd trace out the
schematic.
That's true and possible. I'm in two minds on this t
In extreme brief as nearly 3am and I've been hacking late on a 3277 :)
1. The mechanism has just been extensively serviced by an expert and works
perfectly in local typewriter mode.
2. Possible bad contacts had occurred to me and will be investigated.
3. Yes there's another board that drives the
On 2015-12-17 2:26 AM, Mike Ross wrote:
On Wed, Dec 16, 2015 at 8:01 PM, Brent Hilpert wrote:
On 2015-Dec-15, at 6:21 PM, Mike Ross wrote:
On Wed, Dec 16, 2015 at 11:43 AM, Mike Stein wrote:
I have taken Brent up on that :-)
I'll poke a bit more myself and see what we can work out together
On Wed, Dec 16, 2015 at 8:01 PM, Brent Hilpert wrote:
> On 2015-Dec-15, at 6:21 PM, Mike Ross wrote:
>> On Wed, Dec 16, 2015 at 11:43 AM, Mike Stein wrote:
>>
>> I have taken Brent up on that :-)
>>
>> I'll poke a bit more myself and see what we can work out together
>> before I decide if the eff
>
> Tony, good advice but probably more work than I'm inclined to put in.
What I have suggested would take about 10 minutes tops. It has probably
taken me longer to type this message than it would take me to figure
that out.
> As you said there were many interfaces with different standards -
> d
On 2015-Dec-15, at 6:21 PM, Mike Ross wrote:
> On Wed, Dec 16, 2015 at 11:43 AM, Mike Stein wrote:
>
> I have taken Brent up on that :-)
>
> I'll poke a bit more myself and see what we can work out together
> before I decide if the effort is worth it.
First crack can be picked up here:
On 2015-12-15 10:21 PM, Mike Ross wrote:
I have taken Brent up on that :-)
I'll poke a bit more myself and see what we can work out together
before I decide if the effort is worth it.
http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for million
On Wed, Dec 16, 2015 at 11:43 AM, Mike Stein wrote:
> - Original Message -
> From: "Mike Ross"
> Sent: Tuesday, December 15, 2015 3:41 PM
>
>
>> On Wed, Dec 16, 2015 at 4:35 AM, tony duell wrote:
>>> If you can identify the data lines on the connector you are getting there.
>>> See if y
- Original Message -
From: "Mike Ross"
Sent: Tuesday, December 15, 2015 3:41 PM
> On Wed, Dec 16, 2015 at 4:35 AM, tony duell wrote:
>> If you can identify the data lines on the connector you are getting there.
>> See if you
>> can trace the other pins to inputs or outputs.
>>
>> -ton
On Wed, Dec 16, 2015 at 4:35 AM, tony duell wrote:
>>
>> I guessed that might be the case... any suggestions for what were
>> common pinouts and signals used? I can analyze 'backwards', testing
>
> There were just about as many parallel interface versions as devices
> that used them back then.
[Printer's Ready signal]
> > Why not? It's all the host really needs to know -- can I send
> > another character or not.
>
> Well...it can be very nice for the host to report "out of paper"
> differently from "paper jam" differently from "motor or position
> encoder failure" differently from "fa
On 12/15/2015 10:34 AM, GerardCJAT wrote:
I would take the bet that this IC is simply a R network, 1 KOhm, 1
resistor "across" ie from pin 1 to opposite pin, from pin 2 to
opposite pin, etc What about simple and quick Ohmmeter check ??
That was my first guess--the numbering matches th
>> [T]here's a whole lot of potential 'no, wait, I'm not ready!'
>> conditions. Would they all be ORed onto one pin?
> Why not? It's all the host really needs to know -- can I send
> another character or not.
Well...it can be very nice for the host to report "out of paper"
differently from "pape
>
> > Well, 19 could be a general printer-ready pin in that if the paper runs
> > out it would say the printer is not ready for another character but
> > it might well also be put to the not-ready state when the printer
> > was printing the current character. Seen that before.
>
> Maybe, but Sele
>
> I guessed that might be the case... any suggestions for what were
> common pinouts and signals used? I can analyze 'backwards', testing
There were just about as many parallel interface versions as devices
that used them back then. Nothing 'common' really...
The idea of 7 or 8 data lines,
Solder side pic sent to your email! Thanks!
On Dec 16, 2015 2:22 AM, "Brent Hilpert" wrote:
> On 2015-Dec-14, at 2:02 PM, Mike Ross wrote:
> >
> > - intention was to rip all this out and convert it to a full I/O
> > serial terminal, using an Arduino-based setup that Lawrence Wilkinson
> > has alr
On 2015-Dec-14, at 2:02 PM, Mike Ross wrote:
>
> - intention was to rip all this out and convert it to a full I/O
> serial terminal, using an Arduino-based setup that Lawrence Wilkinson
> has already built and tested:
> https://www.flickr.com/photos/ljw/sets/72157632841492802/with/9201494189/
> -
On Mon, Dec 14, 2015 at 9:15 PM, Fred Cisin wrote:
> On Tue, 15 Dec 2015, Mike Ross wrote:
>>
>> I thought Centronics dated back to early 1970s - not always in the
>> standard 'modern' form, but in general principles with same signaling
>> and strobing of data.
>
> I got in late. My first encount
On 12/14/2015 06:15 PM, Fred Cisin wrote:
I got in late. My first encounter with Centronics was TRS80 (1979?)
At that time, Centronics did not yet have a monopoly on parallel
"protocols", although the company had certainly been around for a
while. Once they got the TRS80 market, and then the IB
On Tue, 15 Dec 2015, Mike Ross wrote:
I thought Centronics dated back to early 1970s - not always in the
standard 'modern' form, but in general principles with same signaling
and strobing of data.
I got in late. My first encounter with Centronics was TRS80 (1979?)
At that time, Centronics did
On Tue, Dec 15, 2015 at 1:21 PM, Fred Cisin wrote:
> On Tue, 15 Dec 2015, Mike Ross wrote:
>> That was my conclusion too. The old Western I/O ads I've seen
>> definitely refer to it as having an 'ASCII' or 'parallel' interface.
>> Assuming they only ever made the two models; I suppose it *could*
On Tue, 15 Dec 2015, Mike Ross wrote:
Maybe, but Selectrics aren't exactly fast devices; there's a whole lot
of potential 'no, wait, I'm not ready!' conditions. Would they all be
ORed onto one pin?
possibly. It's been done that way before.
That was my conclusion too. The old Western I/O ads
On Tue, Dec 15, 2015 at 4:59 AM, tony duell wrote:
> Some more random thoughts
>>
>> Of the above 10 pins, 11, 13, 22 & 23 are high at power-up (printer
>> NOT connected to any interface). The only pin with known function is
>> 19, which is 'paper out'; if I toggle the paper out switch I can s
Some more random thoughts
>
> Of the above 10 pins, 11, 13, 22 & 23 are high at power-up (printer
> NOT connected to any interface). The only pin with known function is
> 19, which is 'paper out'; if I toggle the paper out switch I can see
> it going high and low.
Well, 19 could be a general
> On Dec 14, 2015, at 8:12 AM, tony duell wrote:
>
>
>> Can anyone give me a clue as to the purpose and pinouts of an Allen
>> Bradley 314B102??!!
>
> First guess, it's not really an IC, it's a resistor array. Either separate
> resistors
> going across the chip or resistors all commoned to th
On 14/12/15 13:12, tony duell wrote:
Can anyone give me a clue as to the purpose and pinouts of an Allen
Bradley 314B102??!!
First guess, it's not really an IC, it's a resistor array. Either separate
resistors
going across the chip or resistors all commoned to the highest numbered
pin (which ma
Pretty good guess actually... The rest of the board is pretty simple stuff
I think... Maybe just pullups... Someone who is better than me at squinting
at old circuitry can take a peek!
Mike
On Dec 15, 2015 2:18 AM, "tony duell" wrote:
>
> > Can anyone give me a clue as to the purpose and pinouts
> Can anyone give me a clue as to the purpose and pinouts of an Allen
> Bradley 314B102??!!
First guess, it's not really an IC, it's a resistor array. Either separate
resistors
going across the chip or resistors all commoned to the highest numbered
pin (which may well be +5V).
I would secondly
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