[M100] NEC 8201 LCD

[Robert J. Hutchins]

Question: 

My NEC 8201 has a defect, one half column is always lit up. 

I disassembled it, cleaned the strips but no change.

Is this usually a screen memory defect?

 

If anyone has a Model 100 LCD, in good shape I would like to purchase it.

 

Thank you

Robert J. Hutchins

 

 

Re: [M100] NEC PC8201

[Robert J. Hutchins]

Sounds quite reasonable. Do you have PayPal?

 

Robert

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Gregory 
McGill
Sent: Wednesday, April 06, 2022 9:39 AM
To: m...@bitchin100.com
Subject: Re: [M100] NEC PC8201

 

how's $20 sound? + shipping

 

On Wed, Apr 6, 2022 at 9:13 AM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Yes, I would like that. What would be the cost?

 

Thank you

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com 
<mailto:m100-boun...@lists.bitchin100.com> ] On Behalf Of Gregory McGill
Sent: Tuesday, April 05, 2022 3:37 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] NEC PC8201

 

if you need one printed lmk 

 

On Tue, Apr 5, 2022 at 3:24 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Well, I would be able to assemble it, but unable to create the box.

How does one do that?

 

Thank you

Robert J. Hutchins

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com 
<mailto:m100-boun...@lists.bitchin100.com> ] On Behalf Of John R. Hogerhuis
Sent: Tuesday, April 05, 2022 2:39 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] NEC PC8201

 

I looked on Thingiverse... here's a model if you will take a DIY project 
instead of a battery cassette :-)

https://www.thingiverse.com/thing:2811609

 

-- John.

 

On Tue, Apr 5, 2022 at 2:16 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Does anyone have a battery cassette for an NEC PC-8201A.

Just came across this but it is missing this part.

 

Thank you

Robert J. Hutchins

Re: [M100] NEC PC8201

[Robert J. Hutchins]

Yes, I would like that. What would be the cost?

 

Thank you

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Gregory 
McGill
Sent: Tuesday, April 05, 2022 3:37 PM
To: m...@bitchin100.com
Subject: Re: [M100] NEC PC8201

 

if you need one printed lmk 

 

On Tue, Apr 5, 2022 at 3:24 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Well, I would be able to assemble it, but unable to create the box.

How does one do that?

 

Thank you

Robert J. Hutchins

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com 
<mailto:m100-boun...@lists.bitchin100.com> ] On Behalf Of John R. Hogerhuis
Sent: Tuesday, April 05, 2022 2:39 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] NEC PC8201

 

I looked on Thingiverse... here's a model if you will take a DIY project 
instead of a battery cassette :-)

https://www.thingiverse.com/thing:2811609

 

-- John.

 

On Tue, Apr 5, 2022 at 2:16 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Does anyone have a battery cassette for an NEC PC-8201A.

Just came across this but it is missing this part.

 

Thank you

Robert J. Hutchins

Re: [M100] NEC PC8201

[Robert J. Hutchins]

Well, I would be able to assemble it, but unable to create the box.

How does one do that?

 

Thank you

Robert J. Hutchins

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of John R. 
Hogerhuis
Sent: Tuesday, April 05, 2022 2:39 PM
To: m...@bitchin100.com
Subject: Re: [M100] NEC PC8201

 

I looked on Thingiverse... here's a model if you will take a DIY project 
instead of a battery cassette :-)

https://www.thingiverse.com/thing:2811609

 

-- John.

 

On Tue, Apr 5, 2022 at 2:16 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Does anyone have a battery cassette for an NEC PC-8201A.

Just came across this but it is missing this part.

 

Thank you

Robert J. Hutchins

[M100] NEC PC8201

[Robert J. Hutchins]

Does anyone have a battery cassette for an NEC PC-8201A.

Just came across this but it is missing this part.

 

Thank you

Robert J. Hutchins

Re: [M100] M100 Information

[Robert J. Hutchins]

I have used thin stick on copper tape to repair the tracks at times

 

Robert Hutchins

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Russell
Pitman
Sent: Saturday, January 01, 2022 5:01 PM
To: m...@bitchin100.com
Subject: Re: [M100] M100 Information

 

I have a feeling it could be down to track corrosion  on the LCD PCB as this
unit looks like it has had battery leakage in the past

and some of the tracks on the LCD PCB are darker

 

Russ

 

Sent from Mail   for Windows

 

From: Jeffrey Birt  
Sent: 01 January 2022 03:13
To: m...@bitchin100.com  
Subject: Re: [M100] M100 Information

 

The missing horizontal stripes could be ab LCD driver issue, LCD glass
issue, zebra strip issue or issue with corrosion on the LCD PCB. 

 

Jeff Birt

 

From: M100 mailto:m100-boun...@lists.bitchin100.com> > On Behalf Of Russell Pitman
Sent: Friday, December 31, 2021 7:28 PM
To: m...@bitchin100.com  
Subject: Re: [M100] M100 Information

 

OK, 

 

Progress has been made!  It now seems to boot.  I still feel that a new VR1
is needed as this one is VERY sensitive.

 

Next issue is that of missing lines on the screen...

 

Looks like the screen is in 2 halves and the top line is playing up on
both...

 

Getting excited now, new toy lol

 

Thanks

Russ

 

 

 

Sent from Mail   for Windows

 

From: Brian K. White  
Sent: 01 January 2022 01:18
To: m...@bitchin100.com  
Subject: Re: [M100] M100 Information

 

Thanks much, and wow.

If you look at page 71, pages 70 and 71 are the same, but 70 is a low 
res scan and 71 is a high res scan. It shows both the main and option 
roms right next to each other and sure enough shows that their pinouts 
are different.

I have uploaded a cropped and de-duped copy to archive.org, so for 
everyone else, you can see page 70 here:
https://archive.org/details/kyotronic-kc-85-service-manual/
(download the pdf, the web viewer is super blurry)
https://archive.org/download/kyotronic-kc-85-service-manual/Kyotronic_KC-85_
Service_Manual.pdf


I have the user guide and basic manuals, and I just noticed that the 
user guide the section at the end with all the interface pinouts, 
doesn't even mention the option rom socket at all, even though it does 
include the system bus socket. Though does not include the ram sockets 
either. Even the service manual doesn't mention the option rom socket in 
the same section where all the other interfaces are described. Strange.

I guess this means that if you ever wanted to create an option rom for 
KC-85, you'd actually have to use a Teeprom or REX to do it!

This is super strange. Maybe the M100 pinout was not invented custom for 
the M100 after all? Like maybe Sharp already had a mask rom model with 
this pinout that Kyocera & Tandy just selected from Sharp's existing 
offerings? Or Kyocera created the custom pinout just for the option rom 
for some reason, and Tandy just kept it and even went further to apply 
it to the main rom, again "for some reason"?

-- 
bkw

On 12/31/21 4:59 PM, Stephen Adolph wrote:
> Brian,
> I will send you a link.
> schematic is a bit blurry.
> ALE on pin 23.  yep same as M100.
> 
> image.png
> 
> I still have the original with me, maybe I can get some better diagrams 
> scanned.
> 
> Steve
> 
> 
> On Fri, Dec 31, 2021 at 4:51 PM Brian K. White mailto:b.kenyo...@gmail.com%20%0b> 
> > wrote:
> 
> On 12/31/21 11:16 AM, Stephen Adolph wrote:
>  > Yep.  Some M100s were built with that PCB, as was the KC-85. 
> Makes sense.
>  > cheers
>  > Steve
> 
> Could you send me the docs you have for the kc-85? A few months ago I
> asked if anyone had downloaded the service manual from the now-dead
> link
> in Don Fox's member directory on club100.
> 
> http://club100.org/memfiles/index.php?directory=Don%20Fox
> 
> 
> At that time you said that you thought you had it and would look.
> 
> I can't believe it's really the same pcb, because if nothing else, I
> can't believe the kc-85 would have the m100 pinout for the option rom,
> and even the late model 100's with a standard pinout for the main rom
> still have the 100 pinout for the option rom.
> 
> kc-85 also has no bcr port or modem, but it does have the
> footprints, so
> possibly the related parts could be populated.
> 
> -- 
> bkw
> 


-- 
bkw

 

 

Re: [M100] Checking Traces on TRS -80 Model 100 + = keyswitch

[Robert J. Hutchins]

Martin,

With key trace problems, what you want to do is check continuity with the
ohm meter function of your VOM...
Visually follow the trace to see where it goes.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Martin
Harding
Sent: Friday, December 31, 2021 4:32 PM
To: m100@lists.bitchin100.com
Subject: [M100] Checking Traces on TRS -80 Model 100 + = keyswitch

Hi,

Before I ask a friend to de-solder and re-solder the + = keyswitch on my
Model 100 I thought I would check if the traces were in good order.

Does anyone know where on the back of the keyboard I should place the red
and black pointers of my Voltmeter to check that the traces to the + =
keyswitch are okay ? Also, what numbers should I expect to see on my
Voltmeter screen when I do this ?

Thanks 

Martin Harding

Sent from my iPhone=

Re: [M100] Model 100 battery cover

[Robert J. Hutchins]

Ken,

 

Were you ever able to find them?

 

Bob

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Ken Pettit
Sent: Thursday, August 19, 2021 9:50 AM
To: m100@lists.bitchin100.com
Subject: Re: [M100] Model 100 battery cover

 

I have a whole stack of original M100 battery covers down in the garage 
somewhere.  Give me until the weekend to dig through my stuff (the garage has 
turned into my storage / junk location) and find them.

Ken

On 8/19/21 9:42 AM, Robert J. Hutchins wrote:

This is a link to the one I purchased. The plastic is rather weak and crumbly. 

https://www.thingiverse.com/thing:955567

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jesse Lafleur
Sent: Wednesday, August 18, 2021 9:13 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] Model 100 battery cover

 

Was it resin printer or filament printed? Any pics? any links from where you 
bought it?

I'm positive one that could survive many many openings could be made with the 
right technique.

 

On Wed, Aug 18, 2021 at 10:20 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

 

 

Re: [M100] Model 100 battery cover

[Robert J. Hutchins]

Ken,

 

A whole stack! You should put them on eBay. I’m sure I’m not the only person 
that needs one…

Thanks, I’ll be waiting for your eMail.

 

Robert

 

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Ken Pettit
Sent: Thursday, August 19, 2021 9:50 AM
To: m100@lists.bitchin100.com
Subject: Re: [M100] Model 100 battery cover

 

I have a whole stack of original M100 battery covers down in the garage 
somewhere.  Give me until the weekend to dig through my stuff (the garage has 
turned into my storage / junk location) and find them.

Ken

On 8/19/21 9:42 AM, Robert J. Hutchins wrote:

This is a link to the one I purchased. The plastic is rather weak and crumbly. 

https://www.thingiverse.com/thing:955567

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jesse Lafleur
Sent: Wednesday, August 18, 2021 9:13 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] Model 100 battery cover

 

Was it resin printer or filament printed? Any pics? any links from where you 
bought it?

I'm positive one that could survive many many openings could be made with the 
right technique.

 

On Wed, Aug 18, 2021 at 10:20 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

 

 

Re: [M100] Model 100 battery cover

[Robert J. Hutchins]

This is a link to the one I purchased. The plastic is rather weak and crumbly. 

https://www.thingiverse.com/thing:955567

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jesse Lafleur
Sent: Wednesday, August 18, 2021 9:13 PM
To: m...@bitchin100.com
Subject: Re: [M100] Model 100 battery cover

 

Was it resin printer or filament printed? Any pics? any links from where you 
bought it?

I'm positive one that could survive many many openings could be made with the 
right technique.

 

On Wed, Aug 18, 2021 at 10:20 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

I didn’t print it myself. I purchased it. But even I could see that it would 
not be durable.

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com 
<mailto:m100-boun...@lists.bitchin100.com> ] On Behalf Of Jesse Lafleur
Sent: Wednesday, August 18, 2021 4:35 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] Model 100 battery cover

 

what material did you print with?

 

On Wed, Aug 18, 2021 at 7:30 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Hi all,

 

I am looking for a battery cover for one of my Model 100s.

I tried a 3D printed one from ThingVerse, but the tabs broke after removing it 
a couple of times…

So if anyone has one to sell please let me know.

 

Thank you

Robert

Re: [M100] Model 100 battery cover

[Robert J. Hutchins]

I didn’t print it myself. I purchased it. But even I could see that it would 
not be durable.

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jesse Lafleur
Sent: Wednesday, August 18, 2021 4:35 PM
To: m...@bitchin100.com
Subject: Re: [M100] Model 100 battery cover

 

what material did you print with?

 

On Wed, Aug 18, 2021 at 7:30 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Hi all,

 

I am looking for a battery cover for one of my Model 100s.

I tried a 3D printed one from ThingVerse, but the tabs broke after removing it 
a couple of times…

So if anyone has one to sell please let me know.

 

Thank you

Robert

[M100] Model 100 battery cover

[Robert J. Hutchins]

Hi all,

 

I am looking for a battery cover for one of my Model 100s.

I tried a 3D printed one from ThingVerse, but the tabs broke after removing
it a couple of times.

So if anyone has one to sell please let me know.

 

Thank you

Robert

Re: [M100] A decent replacement for M100 "Feet"

[Robert J. Hutchins]

I just love a cheap lo-tech solution!

 

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Alex ...
Sent: Friday, July 09, 2021 4:42 PM
To: m...@bitchin100.com
Subject: Re: [M100] A decent replacement for M100 "Feet"

 

Fancy!


I just cut a BIC pen tube in half and stuck them in the screw holes. Works 
great.

 

On Fri, Jul 9, 2021 at 4:01 PM Brian Brindle mailto:bbrin...@gmail.com> > wrote:

I found this thing called a "Laptop Foot" at the checkout of my local Barnes 
and Noble the other day. I am slightly embarrassed to admit that I paid $12 for 
it but also I've been very happy with how it works so...

 

It's just the one wedge, you pop it under the back of the M100 and it just sort 
of tripods. It's very stable, no rocking or anything and has it at a decent 
angle for me. I find it easier to keep up with and quicker to deploy than my 
plastic feet. 

 

Quick Amazon search for "Laptop Foot" or Universal Laptop/Notebook stands will 
reveal 4-packs available from $10-$13 but totally lacks the instant 
gratification I received for 4x the price, not to mention the blank look from 
my SO as I ran from the checkout to the Starbucks inside, ripped my rubberized 
wedge from its box and plopped my M102 on it happily exclaiming "Hu?! HU?!! 
Awesome right?!" 

 

She didn't respond, likely because it was too awesome for her to handle. 
Anyway, I thought you guys would appreciate it. 

 

Behold - the M100 foot!

 

http://niedobry.com/mod100/images/

 

 

Brian

 



-- 

Disclaimer: Any resemblance between the above views and those of my employer, 
my terminal, or the view out my window are purely coincidental.  Any 
resemblance between the above and my own views is non-deterministic.  The 
question of the existence of views in the absence of anyone to hold them is 
left as an exercise for the reader.
The question of the existence of the reader is left as an exercise for the 
second god coefficient.  (A discussion of non-orthogonal, non-integral 
polytheism is beyond the scope of this article.) Thanks /usr/games/fortune

Re: [M100] M100 / 102 Wanted

[Robert J. Hutchins]

Bill, 

 

I have clean Model 100, that has a Y2K updated ROM,

with a new memory battery installed.

It also will come with an original manual.

The price is $150 plus shipping.

 

Thank you

Robert

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of
bill.mira...@gmail.com
Sent: Monday, July 05, 2021 6:20 PM
To: m...@bitchin100.com
Subject: Re: [M100] M100 / 102 Wanted

 

Thanks Robert. I look forward to hearing from you.

 

From: M100 mailto:m100-boun...@lists.bitchin100.com> > On Behalf Of Robert J. Hutchins
Sent: Monday, July 5, 2021 7:49 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] M100 / 102 Wanted

 

Bill,

 

I have a few. One M102 some M100s and an NEC 8201.

Let me check them and see how they are.

 

Robert

 

Re: [M100] M100 / 102 Wanted

[Robert J. Hutchins]

Bill,

 

I have a few. One M102 some M100s and an NEC 8201.

Let me check them and see how they are.

 

Robert

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of
bill.mira...@gmail.com
Sent: Monday, July 05, 2021 3:12 PM
To: m...@bitchin100.com
Subject: [M100] M100 / 102 Wanted

 

Hi I am new to the mailing list and I am trying to buy a Model 100 or
preferably a model 102 that is fully functioning and has 32K RAM.  I would
like to find a unit in very good to excellent condition if possible.  Does
anyone have an extra that they would like to sell?  Apologies in advance if
this isn't allowed to ask.

 

Bill

 

 

Re: [M100] NEC PC-8201(A) Recapping Help

[Robert J. Hutchins]

Jeff,

 

Maybe it has the problem that you fixed on mine? The bad buffer chip?

 

Robert

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of ExPLIT | 
Pawel Radomychelski
Sent: Wednesday, May 05, 2021 1:28 PM
To: m...@bitchin100.com
Subject: Re: [M100] NEC PC-8201(A) Recapping Help

 

Thanks for the Info, Jeff.

No, i have no leaking caps on my PC-8201, but i think something is wrong with 
couple of my units. Sometimes, they switched, sometimes display became 
unreadable, sometimes contrast can't be changed.

+5 and -5 are ok, so maybe some of the chips need to be replaced...

 

 

-- 

Kind regards / 

Mit freundlichen Grüßen

 

ExPLIT IT Solutions

Pawel Radomychelski

 

 

 

-Original Message-

From: Jeffrey Birt mailto:jeffrey%20birt%20%3cbir...@soigeneris.com%3e> >

Reply-To: m...@bitchin100.com  

To: m...@bitchin100.com  

Subject: Re: [M100] NEC PC-8201(A) Recapping Help

Date: Wed, 5 May 2021 14:38:42 -0500

 

I have only worked on a few PC-8201/A computers. I have not seen one that 
needed recapped. The TRS-80 Model 100 and Olivetti M10 are a different story, 
they all need recapped.

 

Do your capacitors appear to be leaking or do you suspect they are faulty?

 

Jeff Birt

 

From: M100 mailto:m100-boun...@lists.bitchin100.com> > On Behalf Of ExPLIT | Pawel 
Radomychelski
Sent: Wednesday, May 5, 2021 7:06 AM
To: m...@bitchin100.com  
Subject: [M100] NEC PC-8201(A) Recapping Help

 

Hello Friends!

 

Have someone already did a recapping job on the NEC PC-8201 or PC-8201A ?

I am searching for a starting point, or simple table sheet which capacitors / 
voltage / capacity should be used ?

 

Any help is welcome.

Thanks

 

-- 

Kind regards / 

Mit freundlichen Grüßen

 

ExPLIT IT Solutions

Pawel Radomychelski

 

 

Re: [M100] Happy Earth Day from my M100

[Robert J. Hutchins]

Glad to hear that.

Robert

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jeffrey Birt
Sent: Tuesday, April 27, 2021 5:28 AM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

It will not get thrown away at the very least it will provide parts to fix 
other machines ??


Jeff

-Original Message-
From: M100  On Behalf Of Robert J. Hutchins
Sent: Monday, April 26, 2021 8:19 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

Well, I hope you can fix that M102 board, would be shame to throw it away.
However I did overheat that socket...

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jeffrey Birt
Sent: Monday, April 26, 2021 6:09 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

>>And that M102 board I donated, do you think you will be able  fix it? Just 
>>curious I also have the empty case and keyboard but no LCD if you or anyone 
>>wants it.

I have a 102 with a bad LCD glass and other unknown problems. I was recently 
able to get a few M100 LCDs, and the glass is the same. I may try to swap one 
of the M100 LCD glasses into the 102 LCD frame/PCB and then use parts from both 
PCBs to make one good 102.

I had the LCD frame on the 102 apart several times fixing a bad trace and 
diagnosing the fault was in the glass itself so it may or may not last one more 
round. It would be fun to takes parts of three machines and make on good one 
though.

Jeff

-Original Message-
From: M100  On Behalf Of Robert J. Hutchins
Sent: Monday, April 26, 2021 7:17 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

Jeff,

Sorry about that.
And that M102 board I donated, do you think you will be able  fix it? Just 
curious I also have the empty case and keyboard but no LCD if you or anyone 
wants it.

-Original Message-

Re: [M100] Happy Earth Day from my M100

[Robert J. Hutchins]

Well, I hope you can fix that M102 board, would be shame to throw it away.
However I did overheat that socket...

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jeffrey Birt
Sent: Monday, April 26, 2021 6:09 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

>>And that M102 board I donated, do you think you will be able  fix it? Just 
>>curious I also have the empty case and keyboard but no LCD if you or anyone 
>>wants it.

I have a 102 with a bad LCD glass and other unknown problems. I was recently 
able to get a few M100 LCDs, and the glass is the same. I may try to swap one 
of the M100 LCD glasses into the 102 LCD frame/PCB and then use parts from both 
PCBs to make one good 102.

I had the LCD frame on the 102 apart several times fixing a bad trace and 
diagnosing the fault was in the glass itself so it may or may not last one more 
round. It would be fun to takes parts of three machines and make on good one 
though.

Jeff

-Original Message-
From: M100  On Behalf Of Robert J. Hutchins
Sent: Monday, April 26, 2021 7:17 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

Jeff,

Sorry about that.
And that M102 board I donated, do you think you will be able  fix it? Just 
curious I also have the empty case and keyboard but no LCD if you or anyone 
wants it.

-Original Message-

Re: [M100] Happy Earth Day from my M100

[Robert J. Hutchins]

Jeff,

Sorry about that.
And that M102 board I donated, do you think you will be able  fix it? Just 
curious
I also have the empty case and keyboard but no LCD if you or anyone wants it.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jeffrey Birt
Sent: Monday, April 26, 2021 5:07 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

Give it a rest, please...

Jeff Birt

-Original Message-
From: M100  On Behalf Of Robert J. Hutchins
Sent: Monday, April 26, 2021 6:56 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

"It is the left who have promoted the nonsense that the Earth is in danger"
That sounds like an insult to me.
Sorry if I offended anyone.
I forget that there are kinds of people on this board, maybe some flat earthers 
too!
Enough said, I will leave it there.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Robert J. 
Hutchins
Sent: Monday, April 26, 2021 2:49 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

I think if you are unable to behave, you should leave this board. Please keep 
the politics out of this space.
There are plenty of places on the Internet where you can discuss your ignorant 
beliefs. 
This is not the place.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Hiraghm
Sent: Monday, April 26, 2021 10:41 AM
To: m100@lists.bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

No, it's a leftist cause. It is the left who have promoted the nonsense that 
the Earth is in danger... from Man. Specifically, from western civilization. 
For political purposes.

Oh, and Soylent Green ISN'T a thing, either.

(I originally typed this on my Model 100, then copied it into my Windows email 
client by reading the M100's screen and typing it into the Windows computer. So 
it's on-topic and relevant)

Message: 9
Date: Sat, 24 Apr 2021 22:17:08 -0700
From: Peter Vollan To:m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100
Message-ID:

Content-Type: text/plain; charset="utf-8"

"saving the Earth" is a liberal cause. Hey, wait a minute.

Re: [M100] Happy Earth Day from my M100

[Robert J. Hutchins]

"It is the left who have promoted the nonsense that the Earth is in danger"
That sounds like an insult to me.
Sorry if I offended anyone.
I forget that there are kinds of people on this board, maybe some flat earthers 
too!
Enough said, I will leave it there.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Robert J. 
Hutchins
Sent: Monday, April 26, 2021 2:49 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

I think if you are unable to behave, you should leave this board. Please keep 
the politics out of this space.
There are plenty of places on the Internet where you can discuss your ignorant 
beliefs. 
This is not the place.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Hiraghm
Sent: Monday, April 26, 2021 10:41 AM
To: m100@lists.bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

No, it's a leftist cause. It is the left who have promoted the nonsense that 
the Earth is in danger... from Man. Specifically, from western civilization. 
For political purposes.

Oh, and Soylent Green ISN'T a thing, either.

(I originally typed this on my Model 100, then copied it into my Windows email 
client by reading the M100's screen and typing it into the Windows computer. So 
it's on-topic and relevant)

Message: 9
Date: Sat, 24 Apr 2021 22:17:08 -0700
From: Peter Vollan To:m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100
Message-ID:

Content-Type: text/plain; charset="utf-8"

"saving the Earth" is a liberal cause. Hey, wait a minute.

Re: [M100] Happy Earth Day from my M100

[Robert J. Hutchins]

Sorry I used the word ignorant - the comments just seemed that way to me.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jeffrey Birt
Sent: Monday, April 26, 2021 3:14 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

>> There are plenty of places on the Internet where you can discuss your 
>> ignorant beliefs. 
This is not the place.

Nor is this a place for personal insults...

Jeff Birt

-Original Message-
From: M100  On Behalf Of Robert J. Hutchins
Sent: Monday, April 26, 2021 4:49 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

I think if you are unable to behave, you should leave this board. Please keep 
the politics out of this space.
There are plenty of places on the Internet where you can discuss your ignorant 
beliefs. 
This is not the place.

Re: [M100] Happy Earth Day from my M100

[Robert J. Hutchins]

OK, sorry – but I do not think I was name calling, just using an appropriate 
descriptive adjective.

I hope you warn him too about posting provocative comments that do not belong 
on a board such as this.

And I am entitled to my beliefs also, but I will keep them mum.

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of John R. 
Hogerhuis
Sent: Monday, April 26, 2021 3:52 PM
To: m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

 

Well. I can't allow name calling either. Please don't do that Robert. That's a 
warning.

Hiraghm is entitled to his beliefs and we're not going to discuss them or 
indict him for them. He's a fellow listmember until he isn't. Let us show him 
that respect.

While acknowledging we are not going down this path of political acrimony!

 

-= Model T's Forever =-

 

-- John.

Re: [M100] Happy Earth Day from my M100

[Robert J. Hutchins]

I think if you are unable to behave, you should leave this board. Please keep 
the politics out of this space.
There are plenty of places on the Internet where you can discuss your ignorant 
beliefs. 
This is not the place.

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Hiraghm
Sent: Monday, April 26, 2021 10:41 AM
To: m100@lists.bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100

No, it's a leftist cause. It is the left who have promoted the nonsense that 
the Earth is in danger... from Man. Specifically, from western civilization. 
For political purposes.

Oh, and Soylent Green ISN'T a thing, either.

(I originally typed this on my Model 100, then copied it into my Windows email 
client by reading the M100's screen and typing it into the Windows computer. So 
it's on-topic and relevant)

Message: 9
Date: Sat, 24 Apr 2021 22:17:08 -0700
From: Peter Vollan To:m...@bitchin100.com
Subject: Re: [M100] Happy Earth Day from my M100
Message-ID:

Content-Type: text/plain; charset="utf-8"

"saving the Earth" is a liberal cause. Hey, wait a minute.

Re: [M100] Broken NEC 8201a

[Robert J. Hutchins]

Jeff,

 

Yes, I would like you to have a look at it. 

My thought was RAM. But my desoldering skills are not adequate.

I managed to ruin an M102 board trying to remove the ROM.

Please tell me what to send and to where.

 

Thank you

Robert

 

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jeffrey
Birt
Sent: Wednesday, March 24, 2021 10:36 AM
To: m...@bitchin100.com
Subject: Re: [M100] Broken NEC 8201a

 

The black screen is an indication that the LCD is getting power but not
getting initialized properly. This is most likely because the system is not
booting properly. The RAM modules can fail causing a no boot situation, or
it might be stuck in rest, etc. 

If you want, I'll have a crack at repairing it. They are very similar to the
M100/T102 as far as fixing one.

 

Jeff Birt

 

From: M100 mailto:m100-boun...@lists.bitchin100.com> > On Behalf Of Robert J. Hutchins
Sent: Wednesday, March 24, 2021 11:50 AM
To: m100@lists.bitchin100.com <mailto:m100@lists.bitchin100.com> 
Subject: [M100] Broken NEC 8201a

 

I have an NEC 8201a that will not run. 

On startup I get the black screen that does respond to the contrast control.

I don't believe it is the typical capacitor problem. I have checked a few
voltages and they appear OK.

The unit is in good physical condition.

I also have several Model 100s and a 102 which I have been able to upgrade
the ROMs to Y2K spec and manage a few repairs on.

I am of two minds about the NEC though. 

I might just sell it as is (make an offer?) or if someone would like to have
a go at repairing it, I would be happy to pay for that.

 

Please advise.

 

Thank you 

Robert J. Hutchins

 

 

[M100] Broken NEC 8201a

[Robert J. Hutchins]

I have an NEC 8201a that will not run. 

On startup I get the black screen that does respond to the contrast control.

I don't believe it is the typical capacitor problem. I have checked a few
voltages and they appear OK.

The unit is in good physical condition.

I also have several Model 100s and a 102 which I have been able to upgrade
the ROMs to Y2K spec and manage a few repairs on.

I am of two minds about the NEC though. 

I might just sell it as is (make an offer?) or if someone would like to have
a go at repairing it, I would be happy to pay for that.

 

Please advise.

 

Thank you 

Robert J. Hutchins

 

 

Re: [M100] M100 battery cover

[Robert J. Hutchins]

Went to purchase one today – did not find any.

Will you have more?

 

Thank you

Robert J. Hutchins

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Gregory 
McGill
Sent: Sunday, November 15, 2020 7:06 PM
To: m...@bitchin100.com
Subject: Re: [M100] M100 battery cover

 

I have them in my store at arcadeshopper.com <http://arcadeshopper.com> 

 

On Sun, Nov 15, 2020 at 5:40 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Dear All,

 

I need a battery cover for a Model 100.

Anyone have an extra one for sale?

I know someone responded but I deleted it by mistake!

Please try again.

 

Thank you

Robert J. Hutchins

 

Re: [M100] Why not transfer with Telcom?

[Robert J. Hutchins]

Most Model T file transfer programs use an old non TCP/IP protocol called 
Xmodem...

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Brian K. 
White
Sent: Thursday, February 25, 2021 9:56 PM
To: m...@bitchin100.com
Subject: Re: [M100] Why not transfer with Telcom?

On 2/25/21 9:08 PM, AvantGuard Systems wrote:
> I can use Telcom and connect to BBS's. When on a session you have the 
> options to (I forget the exact terminology on the screen) UPLOAD, DOWNLOAD.

TELCOM has no file transfer ability. All it can do is capture text from the 
serial port to a file and it can read a file and send it out the serial port.

That is missing too many things. No binary data, no machine language programs, 
not even 8-bit text, no error detection, let alone error correction, it can't 
even tell when a file begins or ends out of any other data coming in the serial 
port, nor can tell the host side when sending a file.

You have to do all those kinds of things yourself with separate programs in a 
dozen laborious, inefficient, error-prone steps before and after the actual 
transfer, to manage to get a file transferred that way. 
(encode the file with some kind of utility, generate a checksum of either the 
original file or maybe the encoded file, start the capture on one end, start 
sending from the other end, somehow arrange to ensure that there is not a 
single byte of other junk included in the capture before or after the file 
contents, run a decoder program on the receiving end to unpack the encoded file 
back into it's real form, run a checksum program to verify that, delete the 
encoded version, have an empty machine so that the ram can all be used up on 
having both the file you want and the 2x size encoded copy of it and the 
decoder app all in ram at the same time (so no big files), and then how did you 
get the encoder or decoder app onto the 100 in the first place? Manually type 
it in? Cassette? TELCOM capture an ascii format BASIC program and just hope it 
wasn't corrupted?

You only do that once per reset simply because the system rom provides no other 
option besides the cassette interface (for instance TELCOM has no xmodem), and 
you physically have no choice. So you do that once, just to bootstrap some kind 
of software to do that job for real the rest of the time, until the next time 
you wipe the machine.

> So if I can upload and download files, why can't I build my own FTP 
> SERVER? or whatever server, put the program files on it and download 
> them to the Model100?

I'm not sure what exactly is the question. Yes you can place files on a 
computer and download them to the 100. That's exactly all a TPDD emulator (akak 
tpdd server) does is exactly that.

It's not FTP though. FTP is a tcp/ip protocol. There is no such thing as tcp/ip 
on a 100.

--
bkw

Re: [M100] Remove RAM modules

[Robert J. Hutchins]

Just gently lever them up with a narrow thin screwdriver from each end. And 
don’t worry about the leg length, just gently insert the module until it stops…

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of AvantGuard 
Systems
Sent: Monday, February 22, 2021 6:09 PM
To: m...@bitchin100.com
Subject: [M100] Remove RAM modules

 

So I've got a "new" working M100, but it only has 1 RAM module in it. My old 
non-working is full. I want to remove the ones from the old one, but when I 
tried to pull them out, they just don't move. I'm afraid I might break them. 
But I'm sure I just need to pull them out, right?

 

Also I have 1 new module with very long legs. When I tried putting it into one 
of the available spaces in the "new" device, it just went in maybe half the way 
up the legs. Again, I'm afraid if I push too hard I might break something. Am I 
just being paranoid? 

 

I'm looking through Birt and Josh videos, but I don't see where they removed or 
inserted these modules. 

 

 Curtis

Re: [M100] Retrobrighting. To do or not to do?

[Robert J. Hutchins]

Thanks, I have a jug of 50… The saran wrap sounds like a good idea.

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Scott 
McDonnell
Sent: Sunday, January 03, 2021 6:05 PM
To: m...@bitchin100.com
Subject: Re: [M100] Retrobrighting. To do or not to do?

 

I used 40V cream developer that I bought in a huge jug a couple of years ago. 
Brushed on and wrapped in saran wrap.

 

 

From: Robert J. Hutchins <mailto:robert.hutch...@cox.net> 
Sent: Sunday, January 3, 2021 8:31 PM
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] Retrobrighting. To do or not to do?

 

Very impressive.

 

Did you soak it in solution of H2O2, or just brush on the paste.

 

Bob Hutchins

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Peter Noeth
Sent: Sunday, January 03, 2021 4:48 PM
To: Model 100 Discussion mailto:m100@lists.bitchin100.com> >
Subject: Re: [M100] Retrobrighting. To do or not to do?

 

I believe the original color was a "Bone White" (slight grey and very slight 
yellow added) as opposed to a "paper white". Your Retrobrighted picture looks 
very much like my T102, which has never been exposed to sunlight or tobacco 
smoke, and is the same color on the outside and inside. My M100 was second hand 
and is slightly more yellowish on the outside than the inside, but only 
noticeable when sitting next to the T102.

 

I can't tell from the picture, but how did the function key labels fair in the 
process. They are silk screened on. 

 

At least Radio Shack had the good sense to keep the "double shot molded" 
keycaps, otherwise the legends would be pretty well expired on most of these 
computers by now.

 

Regards,

 

Peter



-

Message: 14
Date: Sun, 3 Jan 2021 09:26:21 -0800
From: "C.Magaret" mailto:mega...@yahoo.com> >
To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
Subject: Re: [M100] Retrobrighting. To do or not to do?
Message-ID: <166a614b-22c6-4051-87ed-e8e4e6817...@yahoo.com 
<mailto:166a614b-22c6-4051-87ed-e8e4e6817...@yahoo.com> >
Content-Type: text/plain; charset="utf-8"

Agreed.  The M100 was originally that off-white color, so I don?t think it will 
get much whiter than that.

CAM

-- 

C.A. Magaret

Sent from my newfangled mobile technogizmo.  Please forgive any typos, 
inelegant brevity, or nonsensical auto-corrections.

> On Jan 3, 2021, at 05:01, Jeffrey Birt  <mailto:bir...@soigeneris.com> > wrote:
> 
> ?
> Looks nice!
>  
> Jeff Birt
>  
> From: M100  <mailto:m100-boun...@lists.bitchin100.com> > On Behalf Of Scott McDonnell
> Sent: Sunday, January 3, 2021 4:10 AM
> To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
> Subject: Re: [M100] Retrobrighting. To do or not to do?
>  
> I don?t know if this picture will embed or not, but this is the result of my 
> retrobright. I decided not to remove the LCD lens because it looked too easy 
> to crack trying to pry it away from the glue. So I just masked it off. I 
> thought it would turn out whiter, but I think the natural color is off-white. 
> Here it is beside a non-whitened case:
>  
> https://drive.google.com/file/d/1MZCpylAc7sEgBvqDzL0j89Z7oVEL8uc_/view?usp=sharing
>  
>  
>  
> From: Scott McDonnell
> Sent: Friday, January 1, 2021 11:13 AM
> To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
> Subject: Re: [M100] Retrobrighting. To do or not to do?
>  
> Since I will be ordering the Novus polish, I guess I will order some white 
> epoxy as well to fill in the burn mark on this case.
>  
> I started disassembly and see that I will need to be careful of the little 
> speaker inside. No way to remove that without breaking some plastic.
>  
> I also need to make funeral arrangements for the spider that apparently chose 
> the M100 as its preferred final resting place.
>  
> Scott M.
>  
> From: Joshua O'Keefe
> Sent: Friday, January 1, 2021 10:57 AM
> To: m...@bitchin100.com <mailto:m...@bitchin100.com> 
> Subject: Re: [M100] Retrobrighting. To do or not to do?
>  
> On Jan 1, 2021, at 7:48 AM, Scott McDonnell  <mailto:mcdonnell.j...@comcast.net> > wrote:
> > I am going to remove the LCD lens and badge first.
>  
> If you're going to have the clear piece out already, I come to very highly 
> recommend Novus 3 step plastic polish to buff out any scratches or wear on 
> it.  I had light to moderate "micro" scratches on my LCD lens and even with 
> my fairly poor buffing technique I was able to almost completely rejuvenate 
> the part using steps 2 and 3.
>  
>  
-- next part --
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Re: [M100] Retrobrighting. To do or not to do?

[Robert J. Hutchins]

Very impressive.

 

Did you soak it in solution of H2O2, or just brush on the paste.

 

Bob Hutchins

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Peter Noeth
Sent: Sunday, January 03, 2021 4:48 PM
To: Model 100 Discussion 
Subject: Re: [M100] Retrobrighting. To do or not to do?

 

I believe the original color was a "Bone White" (slight grey and very slight 
yellow added) as opposed to a "paper white". Your Retrobrighted picture looks 
very much like my T102, which has never been exposed to sunlight or tobacco 
smoke, and is the same color on the outside and inside. My M100 was second hand 
and is slightly more yellowish on the outside than the inside, but only 
noticeable when sitting next to the T102.

 

I can't tell from the picture, but how did the function key labels fair in the 
process. They are silk screened on. 

 

At least Radio Shack had the good sense to keep the "double shot molded" 
keycaps, otherwise the legends would be pretty well expired on most of these 
computers by now.

 

Regards,

 

Peter



-

Message: 14
Date: Sun, 3 Jan 2021 09:26:21 -0800
From: "C.Magaret" mailto:mega...@yahoo.com> >
To: m...@bitchin100.com  
Subject: Re: [M100] Retrobrighting. To do or not to do?
Message-ID: <166a614b-22c6-4051-87ed-e8e4e6817...@yahoo.com 
 >
Content-Type: text/plain; charset="utf-8"

Agreed.  The M100 was originally that off-white color, so I don?t think it will 
get much whiter than that.

CAM

-- 

C.A. Magaret

Sent from my newfangled mobile technogizmo.  Please forgive any typos, 
inelegant brevity, or nonsensical auto-corrections.

> On Jan 3, 2021, at 05:01, Jeffrey Birt   > wrote:
> 
> ?
> Looks nice!
>  
> Jeff Birt
>  
> From: M100   > On Behalf Of Scott McDonnell
> Sent: Sunday, January 3, 2021 4:10 AM
> To: m...@bitchin100.com  
> Subject: Re: [M100] Retrobrighting. To do or not to do?
>  
> I don?t know if this picture will embed or not, but this is the result of my 
> retrobright. I decided not to remove the LCD lens because it looked too easy 
> to crack trying to pry it away from the glue. So I just masked it off. I 
> thought it would turn out whiter, but I think the natural color is off-white. 
> Here it is beside a non-whitened case:
>  
> https://drive.google.com/file/d/1MZCpylAc7sEgBvqDzL0j89Z7oVEL8uc_/view?usp=sharing
>  
>  
>  
> From: Scott McDonnell
> Sent: Friday, January 1, 2021 11:13 AM
> To: m...@bitchin100.com  
> Subject: Re: [M100] Retrobrighting. To do or not to do?
>  
> Since I will be ordering the Novus polish, I guess I will order some white 
> epoxy as well to fill in the burn mark on this case.
>  
> I started disassembly and see that I will need to be careful of the little 
> speaker inside. No way to remove that without breaking some plastic.
>  
> I also need to make funeral arrangements for the spider that apparently chose 
> the M100 as its preferred final resting place.
>  
> Scott M.
>  
> From: Joshua O'Keefe
> Sent: Friday, January 1, 2021 10:57 AM
> To: m...@bitchin100.com  
> Subject: Re: [M100] Retrobrighting. To do or not to do?
>  
> On Jan 1, 2021, at 7:48 AM, Scott McDonnell   > wrote:
> > I am going to remove the LCD lens and badge first.
>  
> If you're going to have the clear piece out already, I come to very highly 
> recommend Novus 3 step plastic polish to buff out any scratches or wear on 
> it.  I had light to moderate "micro" scratches on my LCD lens and even with 
> my fairly poor buffing technique I was able to almost completely rejuvenate 
> the part using steps 2 and 3.
>  
>  
-- next part --
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Re: [M100] FFC for LCD & Keyboard (M102)

[Robert J. Hutchins]

Bert,

I don't really need it so how about $20 plus shipping?

Robert

-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Bert Put
Sent: Wednesday, December 16, 2020 12:39 PM
To: m...@bitchin100.com
Subject: Re: [M100] FFC for LCD & Keyboard (M102)

Hi Robert,

If you still have that M-102 keyboard flat cable, I'll take it off your hands.  
I mangled mine in a previous operation.

Cheers,Bert

On 12/14/20 8:58 PM, Robert J. Hutchins wrote:
> You are right... I put a n M100 lcd in a M102 by soldering the cable 
> ends to the motherboard . Very tricky - but worked I have an M102 cable in my 
> hand. Do you need it?
> 
> 
> -Original Message-
> From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of 
> Michael Kohne
> Sent: Monday, December 14, 2020 5:44 PM
> To: m...@bitchin100.com
> Subject: Re: [M100] FFC for LCD & Keyboard (M102)
> 
> Robert Hutchins: The 102 has a flat flex cable - it's a thin bit of plastic 
> with copper laid down on it. It's not like the connectors that you see on the 
> 100, where yes, ide cable is just the right wire.
> 
> Perhaps217: I did some looking on this subject. The original display FFC is 
> 1.25mm pitch, 152mm long (measured with calipers).
> I thought that was Molex part #15168-0375 , but I ended up buying Molex part 
> #15168-0379 (a 202 mm FFC) as the 152 mm version was not available quantity 1.
> That turned out to be a bit on the thin side, but worked fine once I backed 
> it with a bit of kapton tape.
> 
> Good luck!
> 
> On Mon, Dec 14, 2020 at 7:22 PM Robert J. Hutchins  
> wrote:
>>
>> I needed to do that, and I just used some old IDE cables I had, stripped to 
>> the correct width.
>>
>>
>>
>> Robert
>>
>>
>>
>> From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of 
>> perhaps...@gmail.com
>> Sent: Monday, December 14, 2020 3:33 PM
>> To: m...@bitchin100.com
>> Subject: [M100] FFC for LCD & Keyboard (M102)
>>
>>
>>
>> Hello.
>>
>>
>>
>> I m looking to replace the 18-pin and 30-pin flat-flex-cables in my Model 
>> 102, and was wondering if anyone can confirm the dot pitch. I did order some 
>> 1.0 mm dot pitch from DigiKey which don t appear to be correct - the FFCs 
>> are too narrow:
>>
>> 686618152001
>> 0982670475
>>
>> If someone has the information to share, and perhaps even a known good 
>> source that would be great.
>>
>>
>>
>> Thanks, Alan
> 
> 
> 
> --
> Michael Kohne
> mhko...@kohne.org
> 
> Anything real you do that's important will be scary. Having kids.
> Getting married. Donating a kidney.  Writing a book. Do it anyway. - 
> Neil Gaiman
> 

Re: [M100] FFC for LCD & Keyboard (M102)

[Robert J. Hutchins]

You are right... I put a n M100 lcd in a M102 by soldering the cable ends to 
the motherboard . Very tricky - but worked
I have an M102 cable in my hand. Do you need it?


-Original Message-
From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Michael Kohne
Sent: Monday, December 14, 2020 5:44 PM
To: m...@bitchin100.com
Subject: Re: [M100] FFC for LCD & Keyboard (M102)

Robert Hutchins: The 102 has a flat flex cable - it's a thin bit of plastic 
with copper laid down on it. It's not like the connectors that you see on the 
100, where yes, ide cable is just the right wire.

Perhaps217: I did some looking on this subject. The original display FFC is 
1.25mm pitch, 152mm long (measured with calipers).
I thought that was Molex part #15168-0375 , but I ended up buying Molex part 
#15168-0379 (a 202 mm FFC) as the 152 mm version was not available quantity 1.
That turned out to be a bit on the thin side, but worked fine once I backed it 
with a bit of kapton tape.

Good luck!

On Mon, Dec 14, 2020 at 7:22 PM Robert J. Hutchins  
wrote:
>
> I needed to do that, and I just used some old IDE cables I had, stripped to 
> the correct width.
>
>
>
> Robert
>
>
>
> From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of 
> perhaps...@gmail.com
> Sent: Monday, December 14, 2020 3:33 PM
> To: m...@bitchin100.com
> Subject: [M100] FFC for LCD & Keyboard (M102)
>
>
>
> Hello.
>
>
>
> I m looking to replace the 18-pin and 30-pin flat-flex-cables in my Model 
> 102, and was wondering if anyone can confirm the dot pitch. I did order some 
> 1.0 mm dot pitch from DigiKey which don t appear to be correct - the FFCs are 
> too narrow:
>
> 686618152001
> 0982670475
>
> If someone has the information to share, and perhaps even a known good source 
> that would be great.
>
>
>
> Thanks, Alan



--
Michael Kohne
mhko...@kohne.org

Anything real you do that's important will be scary. Having kids.
Getting married. Donating a kidney.  Writing a book. Do it anyway. - Neil Gaiman

Re: [M100] FFC for LCD & Keyboard (M102)

[Robert J. Hutchins]

I needed to do that, and I just used some old IDE cables I had, stripped to the 
correct width.

 

Robert

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of 
perhaps...@gmail.com
Sent: Monday, December 14, 2020 3:33 PM
To: m...@bitchin100.com
Subject: [M100] FFC for LCD & Keyboard (M102)

 

Hello. 

 

I’m looking to replace the 18-pin and 30-pin flat-flex-cables in my Model 102, 
and was wondering if anyone can confirm the dot pitch. I did order some 1.0 mm 
dot pitch from DigiKey which don’t appear to be correct - the FFCs are too 
narrow:

*   686618152001 

 
*   0982670475 

 

If someone has the information to share, and perhaps even a known good source 
that would be great.

 

Thanks, Alan

Re: [M100] Anyone selling dead Model 100 (shells or otherwise)?

[Robert J. Hutchins]

Hi,

If you are selling pieces, I could use a M102 lcd and motherboard. 

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Benjamin
Forster
Sent: Wednesday, November 18, 2020 5:43 PM
To: m...@bitchin100.com
Subject: Re: [M100] Anyone selling dead Model 100 (shells or otherwise)?

 

Hi: I've got several, though I would have to check to see which ones are
working or not. Do you mind getting a working one? I know I have a 200 that
isn't working

Ben

  _  

From: M100 mailto:m100-boun...@lists.bitchin100.com> > on behalf of Russell Flowers
mailto:rflow...@gmail.com> >
Sent: November 18, 2020 6:01 PM
To: m...@bitchin100.com   mailto:m...@bitchin100.com> >
Subject: [M100] Anyone selling dead Model 100 (shells or otherwise)? 

 

I'm somewhat interested in doing one of those "Raspberry Pi in a 100 case"
projects. Does anyone have a dead 100/102 for sale, and at what price? Due
to the nature of the project, the screen could be total trash (even gone),
the PCB etc. doesn't matter... only thing important would be an intact
keyboard. 

 

If you have one to get rid of, shoot me a price (and shipping)... off or on
list is fine.

 

Yours, Russell

Re: [M100] Dead Model 100

[Robert J. Hutchins]

I assumed you switched off the memory voltage. Hit the reset button. This is 
what corrupted memory does…

Try your memory one piece at a time…

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Peter Vollan
Sent: Wednesday, November 18, 2020 12:04 PM
To: m...@bitchin100.com
Subject: [M100] Dead Model 100

 

 

  modelt.jpg

 

This is what my Model 100s screen looks like now. I cold started, removed the 
REX and even swapped out another main ROM and no change. I was using TS-DOS to 
download files from Dlplus when it happened although I have no idea if that is 
the reason. Anyone have any ideas? Anyone do repairs? Sorry to burden everyone 
with my problems. 

 

Re: [M100] M100 battery cover

[Robert J. Hutchins]

Thank you

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Brian White
Sent: Sunday, November 15, 2020 7:00 PM
To: m...@bitchin100.com
Subject: Re: [M100] M100 battery cover

 

Actually I would download the STL file and have Shapeways or Sculpteo print it 
rather than use the Thingiverse option, because this part has small detailed 
features that are difficult to do a good job with FDM printing. I'd rather get 
it printed by SLS printing.

 

I'll post some links with that all preconfigured in a while so you don't have 
to figure all that out.

 

 

 

On Sun, Nov 15, 2020, 9:54 PM Brian White mailto:b.kenyo...@gmail.com> > wrote:

You mean besides the 3d-printed ones? Go on thingiverse.com 
<http://thingiverse.com>  and put TRS-80 in the search box, and a few different 
covers come up.

 

On Sun, Nov 15, 2020, 8:40 PM Robert J. Hutchins mailto:robert.hutch...@cox.net> > wrote:

Dear All,

 

I need a battery cover for a Model 100.

Anyone have an extra one for sale?

I know someone responded but I deleted it by mistake!

Please try again.

 

Thank you

Robert J. Hutchins

 

[M100] M100 battery cover

[Robert J. Hutchins]

Dear All,

 

I need a battery cover for a Model 100.

Anyone have an extra one for sale?

I know someone responded but I deleted it by mistake!

Please try again.

 

Thank you

Robert J. Hutchins

 

[M100] Model 100 battery cover

[Robert J. Hutchins]

Dear All,

 

I need a battery cover for a Model 100.

Anyone have an extra one for sale?

 

Thank you

Robert J. Hutchins

Re: [M100] Model 100 Boot Issue?

[Robert J. Hutchins]

Try removing the RAM, one at a time…

 

From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Charles 
Hudson
Sent: Saturday, October 17, 2020 2:14 PM
To: m100@lists.bitchin100.com
Subject: [M100] Model 100 Boot Issue?

 

Delving deeper into the mystery:  With no batteries in the tray and no adapter 
powering the unit I measured the voltage of the (nominally) 3.6V 80mah backup 
battery at 4.3 VDC.  I had replaced the original with this battery a few years 
ago and it appears to be in good shape.  (I bought mine on eBay).

 

I also checked the power switch and the adapter socket for continuity; both 
passed.  I unplugged the cable to the display and checked for corrosion; I 
can't see any evidence in the cable, the battery tray or the motherboard in 
that area.  I looked up crystal X1, which seemed to have a foreign substance 
around its base: either glue / insulator or something has leaked.  I don't know 
if there is anything in a crystal that could leak, but I couldn't test the 
crystal directly anyway.

 

Instead I found the 80C85 and located pins 1, 20 and 37, and attached a 
frequency counter to 20 and 37.  The counter was set to sweep from 1.5 MHz to 3 
MHZ.  With power applied to the motherboard the counter never "latched" on any 
frequency.

 

It's too soon to blame the crystal, though: Referring to the troubleshooting 
matrix #1 in the Service Manual, I checked everything listed up until I got to 
the "converter transformer", which was not referenced by part number.  I assume 
it is the one near the power switch, and I took a guess as to which was pin 1.  
If I guessed right, I did not find the expected voltage.

 

I removed and replaced C82 and C83 as recommended but that did not solve the 
problem.  I took some pictures for the benefit of any interested parties:  
https://drive.google.com/file/d/11gkvYUbYowW8TM8zglytiRFqBSvOLlmz/view?usp=sharing,
 
https://drive.google.com/file/d/1BoU6FzNwI6ZIIugVMHL1gieF5Mjrueil/view?usp=sharing,
 
https://drive.google.com/file/d/1M5wl4RLkGL4oSCo6qvCEW8CdmPPl_IVJ/view?usp=sharing,
 
https://drive.google.com/file/d/1g5F2R15J0sJ3UBLnhmxMWurtETGTnaaF/view?usp=sharing.

 

Thanks for your help so far:  Any further suggestions welcome.  

 

-CH-

 

 

 


 

 Image removed by sender.

Virus-free.  

 www.avast.com 

 

[M100] Model M102 board

[Robert J. Hutchins]

I am looking for a Model 102 board and a Model 100 LCD.

Any offers?

 

Thanks

Robert