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Re: TRS-80 Model 100 Board Replication

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Black Epyon <Blackepyon01@yahoo.ca> writes:

> On Sunday, 5 February 2023 at 18:32:23 UTC-8, Daniel wrote:
>> I guess I've decided to do a board replication project starting on the 
>> M100. At this point, I'm looking for a dead model on ebay but no one 
>> wants to sell for less than $100 with shipping it seems. I'd pay $50 for 
>> a 'for parts' unit. 
>> 
>> Success will define this project if I can get some assistance. I have 
>> designed pcb's in the past but for simple projects. This will be, by 
>> far, my most complex effort to date. And I hope a success in this 
>> project will lead to more restoration projects in the future. 
>> 
>> Daniel
> Are you planning on doing a drop-in replacement "replica" using modern
> components, or just an emulator? There's a copy of the service manual
> on Internet Archive that has the schematics, and should help get you
> started.
> https://archive.org/details/TandyM100ServiceManual/page/n81/mode/2up

I'm planning a replica, one-for-one drop in of the board and all traces,
stencils, etc. Some dead devices are due to battery leakage and traces
will be destroyed in many areas - but many components will be okay. In
these cases the device is usually salvaged for parts only and that means
one device removed from circulation. Like the commodore, I'd like a
board replacement and there's been very little interest in the project.

I have the service manuals already and also have Birt's modern remake of
the schematics from his github.

I need to get a dead device so I can depopulate the board, remove all
solder/flux, and do a high definition scan of both sides for all three
boards.

Later, I'd like to redesign the power supply and convert it to USB-C
input and rechargable batteries, but that's way down the road.

I plan on posting my progress of this project on this thread as I go -
barring health issues. Also, I invite community members interested in
helping with design and/or documentation.

Daniel

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Thread

TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-06 02:32 +0000
  Re: TRS-80 Model 100 Board Replication Black Epyon <Blackepyon01@yahoo.ca> - 2023-02-06 07:07 -0800
    Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-07 08:25 +0000
      Re: TRS-80 Model 100 Board Replication Josh Malone <josh.malone@gmail.com> - 2023-02-07 07:16 -0800
        Re: TRS-80 Model 100 Board Replication Walt Perko <r4rguy@gmail.com> - 2023-02-07 09:58 -0800
        Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-09 10:41 +0000
        Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2025-11-08 21:44 -0800
  Re: TRS-80 Model 100 Board Replication bill <bill.gunshannon@gmail.com> - 2023-02-06 10:11 -0500
    Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-07 08:20 +0000
      Re: TRS-80 Model 100 Board Replication bill <bill.gunshannon@gmail.com> - 2023-02-07 12:31 -0500
        Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-13 12:23 +0000
          Re: TRS-80 Model 100 Board Replication David Plass <dplass@gmail.com> - 2023-02-16 10:04 -0800
            Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-17 07:28 +0000
  Re: TRS-80 Model 100 Board Replication Walt Perko <r4rguy@gmail.com> - 2023-02-07 04:36 -0800
  Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-18 09:04 +0000
    Re: TRS-80 Model 100 Board Replication Black Epyon <Blackepyon01@yahoo.ca> - 2023-02-19 06:43 -0800
      Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-20 10:16 +0000
        Re: TRS-80 Model 100 Board Replication Black Epyon <Blackepyon01@yahoo.ca> - 2023-02-21 07:16 -0800
  Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-21 10:21 +0000
  Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-02-27 01:53 +0000
  Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-03-03 14:43 +0000
    Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-03-10 17:53 +0000
      Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-08-07 07:16 +0000
    Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2023-03-23 10:12 +0000
      Re: TRS-80 Model 100 Board Replication Bob Campbell <none@none.none> - 2023-04-02 04:14 +0000
        Re: TRS-80 Model 100 Board Replication Walt Perko <r4rguy@gmail.com> - 2023-04-02 04:55 -0700
          Re: TRS-80 Model 100 Board Replication Bob Campbell <none@none.none> - 2023-04-05 03:52 +0000
            Re: TRS-80 Model 100 Board Replication Walt Perko <r4rguy@gmail.com> - 2023-04-04 22:25 -0700
              Re: TRS-80 Model 100 Board Replication bill <bill.gunshannon@gmail.com> - 2023-04-05 08:51 -0400
                Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2025-11-08 19:14 -0800
  Re: TRS-80 Model 100 Board Replication Daniel <me@sc1f1dan.com> - 2025-11-13 21:29 -0800

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