A few years ago someone asked me about the 24-pin version of the Molex chip carrier for those robots.

https://www.rbrobotics.com/Products/EPROMs.htm

If you have the 24-pin molex socket and didn't want to desolder it to put a standard socket in, there is a 3d-printable model of the carrier to hold a regular dip-24 eprom,

https://github.com/bkw777/Molex78802_Module/blob/master/Carrier/Molex78802_DIP_24.stl


And also a fancy 2-bank virtual 2732 that uses a 28C64 eeprom and a slide switch. Since the chip is SOIC package, it's large enough to be easy to use a test clip to reprogram it.

https://github.com/bkw777/Teeprom/blob/master/MEE2732.md

--
bkw

On 10/2/25 21:17, Scott McDonnell wrote:
Here it is:

https://www.stuff.com.tr/retro-tekno-rb5x/


On 10/2/2025 9:06 PM, Scott McDonnell wrote:
I own two fully working RB5X robots. Two body kits waiting for modern guts.

4 Hero Jrs. 2 Hero 1s.

4 Maxx Steele robots

All of the Omnibots

A teachmover and minimover 5 as well as several of the Spectravideo SVI-2000 arms

And of course Armatrons (my first and only real robot as a kid)

Lots of other lesser known robots. One being a rare Robocycle prototype.

Rick Rowland now owns the RB5X IP and he has been selling body and arm kits. That is where I recently got my two body kits.

https://norlandrobotics.com/rb5x-parts

I am not the first to think of using the RB5X with a Model 100. Somewhere out there is a picture of the RB5X with a M100 attached (from the early 80s) but now I can't seem to find it. I think it may have been in The Robot Book.


On 10/2/2025 8:07 PM, Andrew Ayers wrote:
You have an RB5X? Now I'm jealous...lol...I need another 80s robot like another hole in my head.

I have a Hero Jr, though...my other 80s robots that aren't "toys"; I have the "main line" of the Tomy Omnibot series, plus a few Armatrons (one of these days I'll get around to converting one using that old R-E article; I personally think that was the best conversion I've found of all of 'em from that period).

The others I have are all arms; one Rhino XR-1, two Teachmovers, and a MiniMover 5. I keep hoping to find Terrapin Turtle, or maybe a Hero-1...that I can afford...but I don't think I'll have that kind of luck (I think it all got mostly spent when I found my Altair).

Most of these robots are in various states of needing some TLC; I think the Hero would power up just fine with some batteries, but the arms all need one repair or another to get them back in working shape. The Rhino especially needs a lot of work; my plan is to convert it to some other driving system, because while I have the controller and pendant, I'm not sure how well they work...or if they do.

A long time ago when he was still alive, I did an email interview with David Heiserman about his various books, robots, etc; he mentioned that he had a role in the development of the RB5X, and that it was essentially a polished version of his Rodney machine.

One thing I was glad of, is that when the company shut down fully, they released a bunch of photos, schematics, and what not for the RB5X - in theory, there's enough that that you could probably nearly duplicate one...

Andrew L. Ayers
Glendale, Arizona
phoenixgarage.org
github.com/andrew-ayers

On 10/2/25 1:02 PM, [email protected] wrote:
Send M100 mailing list submissions to
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Today's Topics:

    1. Re: This is my plan (Dave Everett)
    2. Re: This is my plan (Scott McDonnell)
    3. Re: This is my plan (Stephen Adolph)
    4. Re: This is my plan (Scott McDonnell)
    5. Re: This is my plan (Andrew Ayers)


----------------------------------------------------------------------

Message: 1
Date: Thu, 2 Oct 2025 08:07:13 +1000
From: Dave Everett <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID:
    <cag61pbcbyqyif5kxfq8y357a84vhmfakvhp0fmz9fwoaaaw...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Certainly more expensive, they used to be $11 each and they were rock
solid. I will need to order a set of the ones from Amazon and give them a
go.

Dave

On Wed, 1 Oct 2025 at 5:32 pm, Scott McDonnell <[email protected]>
wrote:

They look like expensive versions of the HC-12 modules.


https://www.amazon.com/433Mhz-Wireless-Replace-Bluetooth-Antenna/ dp/B0C7M99BQM


On 9/30/2025 9:08 PM, Dave Everett wrote:

Check out the description for these:

https://ebay.us/m/drkr36


Dave

On Wed, 1 Oct 2025 at 11:04, Scott McDonnell <[email protected]>
wrote:

1200 baud seems to be the most reliable. 9600 is possible, though.
On 9/30/2025 8:50 PM, Dave Everett wrote:

What was the max baud rate for the m100? I regularly use transceiver
modules that do ttl rs-232. They run at 9600 but from memory that can be
changed. I just don?t recall if it can go lower.

Dave

On Wed, 1 Oct 2025 at 08:50, Scott McDonnell <[email protected]>
wrote:

I plan to dedicate one of my Model 100s to use as a controller for my
80s robots.

These are my planned mods to implement this:

1. Internal retro wifi modem (oldnet.com)

       I plan to make hack onto the MC14412 chip. I have no plan to
retain the original modem functionality, but if I did, I am thinking I could implement this via the modem enable signal. That would also allow me to control power to the ESP8266 so that it did not drain the battery
when not in use. I could bring the enable line out to a switch to
reconnect the enable line to the MC14412. At the moment, I can't really
think of why I might ever want the original modem.

I will use a Wemos D1 mini with an external antenna that I will attach
to the M100 body.

2. Complete my originally idea to port the TPDDuino project to the
sparkfun openlog hardware and make this internal

      Here, I am thinking the BCR TTL serial mod would be appropriate. This frees up the serial port which I will need for the robot control. Not sure if TSDOS already supports this, however. There could could be
some benefits to the faster speed possible with the BCR hack.

3. Wireless serial

      For this, I have not decided whether to use bluetooth or an HC-12 module. This will be in an external modules so that I can use the serial port for other purposes. I do plan to add a fused 5V output to pin 25 of the serial port. This was a common pin to use back in the day for adding a power output. It doesn't appear to be connected to ground in the M100
per the schematics, but I will need to double-check.

4. Joystick mod mentioned previously

      If I will be using the BCR port for the TPPDuino, then I will end
up implementing the ideas discussed in that thread for using the
parallel port. But I also might just hack into the keyboard matrix
arrows since this will be dedicated for this purpose. Still weighing
this while I work on the other mods.

-----------------------

Interested in internal battery hacks. I have been thinking of installing
a 7.2V nimh pack. I am not really sure it could fit anywhere inside,
though.

While looking through old magazines, I had seen products that were
available at the time which were battery packs that also doubled as tilt
stands. I liked the look of those and might end up 3-D printing
something like that. There was a simpler project to use a PVC pipe with
D cell batteries and the author fashioned that to also act as a tilt
stand.

For my first M100, I had modified a book light to attach to the BCR port to provide light for the LCD. I wasn't especially happy with it as the clear plastic bezel is too glossy and reflected too much of the light. I feel like if there were any possible enhancement here, it would need to be some sort of front light mounted internally. This is probably outside
of how much effort I want to put into this.

Interested in hearing about any experience and efforts into trying to
improve the readability of the LCD.


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------------------------------

Message: 2
Date: Wed, 1 Oct 2025 18:18:28 -0400
From: Scott McDonnell <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

The ebay listing says they are 2.4GHZ. The HC-12 is 433mhz. I missed
that initially because they look pretty much identical physically.

The HC-12 is supposedly transparent and can operate at the much lower
baudrates. Most bluetooth modules can only go down to 9600 baud. You
might recall from our other group discussions that I ended up making an
ESP32 bluetooth serial relay for the Hero and RB5X because of the 7 bit
data width and the lower baudrates. The old roving networks bluetooth
modules supported 7 bits, but the firmware was later changed when
Microchip bought RN and that support was dropped.

Others have used this HC-12 module with our robots.

https://www.youtube.com/watch?v=QVCrRt5IkiI


On 10/1/2025 6:07 PM, Dave Everett wrote:
Certainly more expensive, they used to be $11 each and they were rock
solid. I will need to order a set of the ones from Amazon and give
them a go.

Dave

On Wed, 1 Oct 2025 at 5:32 pm, Scott McDonnell
<[email protected]> wrote:

     They look like expensive versions of the HC-12 modules.

https://www.amazon.com/433Mhz-Wireless-Replace-Bluetooth-Antenna/ dp/B0C7M99BQM


     On 9/30/2025 9:08 PM, Dave Everett wrote:
     Check out the description for these:

     https://ebay.us/m/drkr36


     Dave

     On Wed, 1 Oct 2025 at 11:04, Scott McDonnell
     <[email protected]> wrote:

         1200 baud seems to be the most reliable. 9600 is possible,
         though.

         On 9/30/2025 8:50 PM, Dave Everett wrote:
         What was the max baud rate for the m100? I regularly use
         transceiver modules that do ttl rs-232. They run at 9600 but
         from memory that can be changed. I just don?t recall if it
         can go lower.

         Dave

         On Wed, 1 Oct 2025 at 08:50, Scott McDonnell
         <[email protected]> wrote:

             I plan to dedicate one of my Model 100s to use as a
             controller for my
             80s robots.

             These are my planned mods to implement this:

             1. Internal retro wifi modem (oldnet.com
             <http://oldnet.com>)

             ?? ? ?I plan to make hack onto the MC14412 chip. I have
             no plan to
             retain the original modem functionality, but if I did, I
             am thinking I
             could implement this via the modem enable signal. That
             would also allow
             me to control power to the ESP8266 so that it did not
             drain the battery
             when not in use. I could bring the enable line out to a
             switch to
             reconnect the enable line to the MC14412. At the moment,
             I can't really
             think of why I might ever want the original modem.

             I will use a Wemos D1 mini with an external antenna that
             I will attach
             to the M100 body.

             2. Complete my originally idea to port the TPDDuino
             project to the
             sparkfun openlog hardware and make this internal

             ?? ? Here, I am thinking the BCR TTL serial mod would be
             appropriate.
             This frees up the serial port which I will need for the
             robot control.
             Not sure if TSDOS already supports this, however. There
             could could be
             some benefits to the faster speed possible with the BCR
             hack.

             3. Wireless serial

             ?? ? For this, I have not decided whether to use
             bluetooth or an HC-12
             module. This will be in an external modules so that I
             can use the serial
             port for other purposes. I do plan to add a fused 5V
             output to pin 25 of
             the serial port. This was a common pin to use back in
             the day for adding
             a power output. It doesn't appear to be connected to
             ground in the M100
             per the schematics, but I will need to double-check.

             4. Joystick mod mentioned previously

             ?? ? If I will be using the BCR port for the TPPDuino,
             then I will end
             up implementing the ideas discussed in that thread for
             using the
             parallel port. But I also might just hack into the
             keyboard matrix
             arrows since this will be dedicated for this purpose.
             Still weighing
             this while I work on the other mods.

             -----------------------

             Interested in internal battery hacks. I have been
             thinking of installing
             a 7.2V nimh pack. I am not really sure it could fit
             anywhere inside, though.

             While looking through old magazines, I had seen products
             that were
             available at the time which were battery packs that also
             doubled as tilt
             stands. I liked the look of those and might end up 3-D
             printing
             something like that. There was a simpler project to use
             a PVC pipe with
             D cell batteries and the author fashioned that to also
             act as a tilt stand.

             For my first M100, I had modified a book light to attach
             to the BCR port
             to provide light for the LCD. I wasn't especially happy
             with it as the
             clear plastic bezel is too glossy and reflected too much
             of the light. I
             feel like if there were any possible enhancement here,
             it would need to
             be some sort of front light mounted internally. This is
             probably outside
             of how much effort I want to put into this.

             Interested in hearing about any experience and efforts
             into trying to
             improve the readability of the LCD.

-------------- next part --------------
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------------------------------

Message: 3
Date: Wed, 1 Oct 2025 18:23:50 -0400
From: Stephen Adolph <[email protected]>
To: "[email protected]" <[email protected]>
Subject: Re: [M100] This is my plan
Message-ID:
    <camcmnv5scetvrgrc2actvmefsod1yfzuzxhnpnnzg8joxyo...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

I'll add a comment.
I would make sure the modules support hardware handshaking fornlocal flow
control.

These Bluetooth dongles don't at all actually emulate a wire. The flow of bytes is very different and you might find applications like tsdos suffer
from timeouts and other problems arising from buffer overflows.

Another good feature would be to have the dongle obey software flow control.

Good luck.  I've played around with Bluetooth in the past with mixed
results.  I wanted to have wireless connectivity to a nadsbox or online
laddiealpha folder.  Never got it to work well.

Cheers
Steve



On Wednesday, October 1, 2025, Dave Everett <[email protected]> wrote:

Certainly more expensive, they used to be $11 each and they were rock
solid. I will need to order a set of the ones from Amazon and give them a
go.

Dave

On Wed, 1 Oct 2025 at 5:32 pm, Scott McDonnell <[email protected]>
wrote:

They look like expensive versions of the HC-12 modules.

https://www.amazon.com/433Mhz-Wireless-Replace-Bluetooth-
Antenna/dp/B0C7M99BQM


On 9/30/2025 9:08 PM, Dave Everett wrote:

Check out the description for these:

https://ebay.us/m/drkr36


Dave

On Wed, 1 Oct 2025 at 11:04, Scott McDonnell <[email protected]>
wrote:

1200 baud seems to be the most reliable. 9600 is possible, though.
On 9/30/2025 8:50 PM, Dave Everett wrote:

What was the max baud rate for the m100? I regularly use transceiver
modules that do ttl rs-232. They run at 9600 but from memory that can be
changed. I just don?t recall if it can go lower.

Dave

On Wed, 1 Oct 2025 at 08:50, Scott McDonnell <[email protected]>
wrote:

I plan to dedicate one of my Model 100s to use as a controller for my
80s robots.

These are my planned mods to implement this:

1. Internal retro wifi modem (oldnet.com)

       I plan to make hack onto the MC14412 chip. I have no plan to
retain the original modem functionality, but if I did, I am thinking I could implement this via the modem enable signal. That would also allow me to control power to the ESP8266 so that it did not drain the battery
when not in use. I could bring the enable line out to a switch to
reconnect the enable line to the MC14412. At the moment, I can't really
think of why I might ever want the original modem.

I will use a Wemos D1 mini with an external antenna that I will attach
to the M100 body.

2. Complete my originally idea to port the TPDDuino project to the
sparkfun openlog hardware and make this internal

      Here, I am thinking the BCR TTL serial mod would be appropriate. This frees up the serial port which I will need for the robot control. Not sure if TSDOS already supports this, however. There could could be
some benefits to the faster speed possible with the BCR hack.

3. Wireless serial

      For this, I have not decided whether to use bluetooth or an HC-12
module. This will be in an external modules so that I can use the
serial
port for other purposes. I do plan to add a fused 5V output to pin 25
of
the serial port. This was a common pin to use back in the day for
adding
a power output. It doesn't appear to be connected to ground in the M100
per the schematics, but I will need to double-check.

4. Joystick mod mentioned previously

      If I will be using the BCR port for the TPPDuino, then I will end
up implementing the ideas discussed in that thread for using the
parallel port. But I also might just hack into the keyboard matrix
arrows since this will be dedicated for this purpose. Still weighing
this while I work on the other mods.

-----------------------

Interested in internal battery hacks. I have been thinking of
installing
a 7.2V nimh pack. I am not really sure it could fit anywhere inside,
though.

While looking through old magazines, I had seen products that were
available at the time which were battery packs that also doubled as
tilt
stands. I liked the look of those and might end up 3-D printing
something like that. There was a simpler project to use a PVC pipe with D cell batteries and the author fashioned that to also act as a tilt
stand.

For my first M100, I had modified a book light to attach to the BCR
port
to provide light for the LCD. I wasn't especially happy with it as the clear plastic bezel is too glossy and reflected too much of the light.
I
feel like if there were any possible enhancement here, it would need to
be some sort of front light mounted internally. This is probably
outside
of how much effort I want to put into this.

Interested in hearing about any experience and efforts into trying to
improve the readability of the LCD.


-------------- next part --------------
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URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/ attachments/20251001/e56faa68/attachment-0001.htm>

------------------------------

Message: 4
Date: Wed, 1 Oct 2025 18:29:48 -0400
From: Scott McDonnell <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Yeah, I am not aware of any modules that actually pass the handshaking
beyond high-end industrial converters. That would likely need to be
serial over wifi as the bluetooth serial protocol just doesn't have this
built in. I also have a pair of those, but they are around $95 a piece
and not small. You might be able to do it with ESP32s.

Thankfully I don't need handshaking for the robots. They only have TX
and RX.

Scott

On 10/1/2025 6:23 PM, Stephen Adolph wrote:
I'll add a comment.
I would make sure the modules support hardware handshaking fornlocal
flow control.

These Bluetooth dongles don't at all actually emulate a wire.? The
flow of bytes is very different and you might find applications like
tsdos suffer from timeouts and other problems arising from buffer
overflows.

Another good feature would be to have the dongle obey software flow
control.

Good luck.? I've played around with Bluetooth in the past with mixed
results.? I wanted to have wireless connectivity to a nadsbox or
online laddiealpha folder.? Never got it to work well.

Cheers
Steve



On Wednesday, October 1, 2025, Dave Everett <[email protected]>
wrote:

     Certainly more expensive, they used to be $11 each and they were
     rock solid. I will need to order a set of the ones from Amazon and
     give them a go.

     Dave

     On Wed, 1 Oct 2025 at 5:32 pm, Scott McDonnell
     <[email protected]> wrote:

         They look like expensive versions of the HC-12 modules.

https://www.amazon.com/433Mhz-Wireless-Replace-Bluetooth-Antenna/ dp/B0C7M99BQM <https://www.amazon.com/433Mhz-Wireless-Replace-Bluetooth-Antenna/ dp/B0C7M99BQM>


         On 9/30/2025 9:08 PM, Dave Everett wrote:
         Check out the description for these:

         https://ebay.us/m/drkr36


         Dave

         On Wed, 1 Oct 2025 at 11:04, Scott McDonnell
         <[email protected]> wrote:

             1200 baud seems to be the most reliable. 9600 is
             possible, though.

             On 9/30/2025 8:50 PM, Dave Everett wrote:
             What was the max baud rate for the m100? I regularly use              transceiver modules that do ttl rs-232. They run at 9600              but from memory that can be changed. I just don?t recall
             if it can go lower.

             Dave

             On Wed, 1 Oct 2025 at 08:50, Scott McDonnell
             <[email protected]> wrote:

                 I plan to dedicate one of my Model 100s to use as a
                 controller for my
                 80s robots.

                 These are my planned mods to implement this:

                 1. Internal retro wifi modem (oldnet.com
                 <http://oldnet.com>)

                 ?? ? ?I plan to make hack onto the MC14412 chip. I
                 have no plan to
                 retain the original modem functionality, but if I
                 did, I am thinking I
                 could implement this via the modem enable signal.
                 That would also allow
                 me to control power to the ESP8266 so that it did
                 not drain the battery
                 when not in use. I could bring the enable line out
                 to a switch to
                 reconnect the enable line to the MC14412. At the
                 moment, I can't really
                 think of why I might ever want the original modem.

                 I will use a Wemos D1 mini with an external antenna
                 that I will attach
                 to the M100 body.

                 2. Complete my originally idea to port the TPDDuino
                 project to the
                 sparkfun openlog hardware and make this internal

                 ?? ? Here, I am thinking the BCR TTL serial mod
                 would be appropriate.
                 This frees up the serial port which I will need for
                 the robot control.
                 Not sure if TSDOS already supports this, however.
                 There could could be
                 some benefits to the faster speed possible with the
                 BCR hack.

                 3. Wireless serial

                 ?? ? For this, I have not decided whether to use
                 bluetooth or an HC-12
                 module. This will be in an external modules so that
                 I can use the serial
                 port for other purposes. I do plan to add a fused 5V
                 output to pin 25 of
                 the serial port. This was a common pin to use back
                 in the day for adding
                 a power output. It doesn't appear to be connected to
                 ground in the M100
                 per the schematics, but I will need to double- check.

                 4. Joystick mod mentioned previously

                 ?? ? If I will be using the BCR port for the
                 TPPDuino, then I will end
                 up implementing the ideas discussed in that thread
                 for using the
                 parallel port. But I also might just hack into the
                 keyboard matrix
                 arrows since this will be dedicated for this
                 purpose. Still weighing
                 this while I work on the other mods.

                 -----------------------

                 Interested in internal battery hacks. I have been
                 thinking of installing
                 a 7.2V nimh pack. I am not really sure it could fit
                 anywhere inside, though.

                 While looking through old magazines, I had seen
                 products that were
                 available at the time which were battery packs that
                 also doubled as tilt
                 stands. I liked the look of those and might end up
                 3-D printing
                 something like that. There was a simpler project to
                 use a PVC pipe with
                 D cell batteries and the author fashioned that to
                 also act as a tilt stand.

                 For my first M100, I had modified a book light to
                 attach to the BCR port
                 to provide light for the LCD. I wasn't especially
                 happy with it as the
                 clear plastic bezel is too glossy and reflected too
                 much of the light. I
                 feel like if there were any possible enhancement
                 here, it would need to
                 be some sort of front light mounted internally. This
                 is probably outside
                 of how much effort I want to put into this.

                 Interested in hearing about any experience and
                 efforts into trying to
                 improve the readability of the LCD.

-------------- next part --------------
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URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/ attachments/20251001/41ece378/attachment-0001.htm>

------------------------------

Message: 5
Date: Thu, 2 Oct 2025 10:45:09 -0700
From: Andrew Ayers <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8; format=flowed

In regards to the battery thing, probably the safest thing might be to
use some AA lithium rechargeable cells; get the highest Ah you can
find...you would then need to build some kind of balance charging/BMS
setup...but there are boards for that.

Or, maybe go with a decent 3.7v prismatic or folded lithium device (like
tablets and phones use) with a decent Ah, then use a boost converter to
5 volts?

As far as the hardware goes:

1. Does the BCR route provide for 2-way (TX/RX) serial? I only ask
because IIRC, wasn't the pen one-way only?

2. If you plan on using an ESP8266 - why not instead an ESP32-CS mini
board? You could get bluetooth that way without needing a secondary
module...

3. If there isn't any real need for bluetooth, you could stick with
using wifi...?

4. That Sparkfun OpenLog hardware looks interesting; a very tiny Arduino
with microSD seems perfect for what you want to do.

Now - all of that aside, is there any reason you couldn't consolidate
all of this onto a single small embedded board (like the ESP32-C3),
hooked up to the serial port?

I'm sure it would take some extra programming effort, but I'm wondering
if maybe you could extend the way the TPDDuino firmware works to add in
the extra communication needs (if I'm understanding you right, the
wireless comms you want are to communicate with/control your robots?)...

Andrew L. Ayers
Glendale, Arizona
phoenixgarage.org
github.com/andrew-ayers

On 10/1/25 1:02 PM, [email protected] wrote:
Send M100 mailing list submissions to
    [email protected]

To subscribe or unsubscribe via the World Wide Web, visit
    http://lists.bitchin100.com/listinfo.cgi/m100-bitchin100.com
or, via email, send a message with subject or body 'help' to
    [email protected]

You can reach the person managing the list at
    [email protected]

When replying, please edit your Subject line so it is more specific
than "Re: Contents of M100 digest..."


Today's Topics:

     1. This is my plan (Scott McDonnell)
     2. Re: This is my plan (Dave Everett)
     3. Re: This is my plan (Scott McDonnell)
     4. Re: This is my plan (Dave Everett)
     5. Re: This is my plan (Scott McDonnell)
     6. Re: This is my plan (Justin Poirier)
     7. Re: This is my plan (Scott McDonnell)


----------------------------------------------------------------------

Message: 1
Date: Tue, 30 Sep 2025 18:49:47 -0400
From: Scott McDonnell <[email protected]>
To: [email protected]
Subject: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8; format=flowed

I plan to dedicate one of my Model 100s to use as a controller for my
80s robots.

These are my planned mods to implement this:

1. Internal retro wifi modem (oldnet.com)

   ? ? ?I plan to make hack onto the MC14412 chip. I have no plan to
retain the original modem functionality, but if I did, I am thinking I
could implement this via the modem enable signal. That would also allow me to control power to the ESP8266 so that it did not drain the battery
when not in use. I could bring the enable line out to a switch to
reconnect the enable line to the MC14412. At the moment, I can't really
think of why I might ever want the original modem.

I will use a Wemos D1 mini with an external antenna that I will attach
to the M100 body.

2. Complete my originally idea to port the TPDDuino project to the
sparkfun openlog hardware and make this internal

   ? ? Here, I am thinking the BCR TTL serial mod would be appropriate.
This frees up the serial port which I will need for the robot control.
Not sure if TSDOS already supports this, however. There could could be
some benefits to the faster speed possible with the BCR hack.

3. Wireless serial

   ? ? For this, I have not decided whether to use bluetooth or an HC-12 module. This will be in an external modules so that I can use the serial port for other purposes. I do plan to add a fused 5V output to pin 25 of the serial port. This was a common pin to use back in the day for adding a power output. It doesn't appear to be connected to ground in the M100
per the schematics, but I will need to double-check.

4. Joystick mod mentioned previously

   ? ? If I will be using the BCR port for the TPPDuino, then I will end
up implementing the ideas discussed in that thread for using the
parallel port. But I also might just hack into the keyboard matrix
arrows since this will be dedicated for this purpose. Still weighing
this while I work on the other mods.

-----------------------

Interested in internal battery hacks. I have been thinking of installing a 7.2V nimh pack. I am not really sure it could fit anywhere inside, though.

While looking through old magazines, I had seen products that were
available at the time which were battery packs that also doubled as tilt
stands. I liked the look of those and might end up 3-D printing
something like that. There was a simpler project to use a PVC pipe with D cell batteries and the author fashioned that to also act as a tilt stand.

For my first M100, I had modified a book light to attach to the BCR port
to provide light for the LCD. I wasn't especially happy with it as the
clear plastic bezel is too glossy and reflected too much of the light. I feel like if there were any possible enhancement here, it would need to be some sort of front light mounted internally. This is probably outside
of how much effort I want to put into this.

Interested in hearing about any experience and efforts into trying to
improve the readability of the LCD.



------------------------------

Message: 2
Date: Wed, 1 Oct 2025 10:50:52 +1000
From: Dave Everett <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID:
    <CAG61pbdUm=2o+CR31yAFdeNKpXpMmYRXML8YKhHxTWASXm=u...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

What was the max baud rate for the m100? I regularly use transceiver
modules that do ttl rs-232. They run at 9600 but from memory that can be
changed. I just don?t recall if it can go lower.

Dave

On Wed, 1 Oct 2025 at 08:50, Scott McDonnell <[email protected]>
wrote:

I plan to dedicate one of my Model 100s to use as a controller for my
80s robots.

These are my planned mods to implement this:

1. Internal retro wifi modem (oldnet.com)

        I plan to make hack onto the MC14412 chip. I have no plan to
retain the original modem functionality, but if I did, I am thinking I could implement this via the modem enable signal. That would also allow me to control power to the ESP8266 so that it did not drain the battery
when not in use. I could bring the enable line out to a switch to
reconnect the enable line to the MC14412. At the moment, I can't really
think of why I might ever want the original modem.

I will use a Wemos D1 mini with an external antenna that I will attach
to the M100 body.

2. Complete my originally idea to port the TPDDuino project to the
sparkfun openlog hardware and make this internal

       Here, I am thinking the BCR TTL serial mod would be appropriate. This frees up the serial port which I will need for the robot control. Not sure if TSDOS already supports this, however. There could could be
some benefits to the faster speed possible with the BCR hack.

3. Wireless serial

       For this, I have not decided whether to use bluetooth or an HC-12 module. This will be in an external modules so that I can use the serial port for other purposes. I do plan to add a fused 5V output to pin 25 of the serial port. This was a common pin to use back in the day for adding a power output. It doesn't appear to be connected to ground in the M100
per the schematics, but I will need to double-check.

4. Joystick mod mentioned previously

       If I will be using the BCR port for the TPPDuino, then I will end
up implementing the ideas discussed in that thread for using the
parallel port. But I also might just hack into the keyboard matrix
arrows since this will be dedicated for this purpose. Still weighing
this while I work on the other mods.

-----------------------

Interested in internal battery hacks. I have been thinking of installing
a 7.2V nimh pack. I am not really sure it could fit anywhere inside,
though.

While looking through old magazines, I had seen products that were
available at the time which were battery packs that also doubled as tilt
stands. I liked the look of those and might end up 3-D printing
something like that. There was a simpler project to use a PVC pipe with D cell batteries and the author fashioned that to also act as a tilt stand.

For my first M100, I had modified a book light to attach to the BCR port to provide light for the LCD. I wasn't especially happy with it as the clear plastic bezel is too glossy and reflected too much of the light. I feel like if there were any possible enhancement here, it would need to be some sort of front light mounted internally. This is probably outside
of how much effort I want to put into this.

Interested in hearing about any experience and efforts into trying to
improve the readability of the LCD.


-------------- next part --------------
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------------------------------

Message: 3
Date: Tue, 30 Sep 2025 20:59:06 -0400
From: Scott McDonnell <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

1200 baud seems to be the most reliable. 9600 is possible, though.

On 9/30/2025 8:50 PM, Dave Everett wrote:
What was the max baud rate for the m100? I regularly use transceiver
modules that do ttl rs-232. They run at 9600 but from memory that can
be changed. I just don?t recall if it can go lower.

Dave

On Wed, 1 Oct 2025 at 08:50, Scott McDonnell
<[email protected]> wrote:

      I plan to dedicate one of my Model 100s to use as a controller for my
      80s robots.

      These are my planned mods to implement this:

      1. Internal retro wifi modem (oldnet.com <http://oldnet.com>)

      ?? ? ?I plan to make hack onto the MC14412 chip. I have no plan to
      retain the original modem functionality, but if I did, I am
      thinking I
      could implement this via the modem enable signal. That would also
      allow
      me to control power to the ESP8266 so that it did not drain the
      battery
      when not in use. I could bring the enable line out to a switch to       reconnect the enable line to the MC14412. At the moment, I can't
      really
      think of why I might ever want the original modem.

      I will use a Wemos D1 mini with an external antenna that I will
      attach
      to the M100 body.

      2. Complete my originally idea to port the TPDDuino project to the
      sparkfun openlog hardware and make this internal

      ?? ? Here, I am thinking the BCR TTL serial mod would be appropriate.
      This frees up the serial port which I will need for the robot
      control.
      Not sure if TSDOS already supports this, however. There could
      could be
      some benefits to the faster speed possible with the BCR hack.

      3. Wireless serial

      ?? ? For this, I have not decided whether to use bluetooth or an
      HC-12
      module. This will be in an external modules so that I can use the
      serial
      port for other purposes. I do plan to add a fused 5V output to pin
      25 of
      the serial port. This was a common pin to use back in the day for
      adding
      a power output. It doesn't appear to be connected to ground in the
      M100
      per the schematics, but I will need to double-check.

      4. Joystick mod mentioned previously

      ?? ? If I will be using the BCR port for the TPPDuino, then I will
      end
      up implementing the ideas discussed in that thread for using the       parallel port. But I also might just hack into the keyboard matrix       arrows since this will be dedicated for this purpose. Still weighing
      this while I work on the other mods.

      -----------------------

      Interested in internal battery hacks. I have been thinking of
      installing
      a 7.2V nimh pack. I am not really sure it could fit anywhere
      inside, though.

      While looking through old magazines, I had seen products that were       available at the time which were battery packs that also doubled
      as tilt
      stands. I liked the look of those and might end up 3-D printing
      something like that. There was a simpler project to use a PVC pipe
      with
      D cell batteries and the author fashioned that to also act as a
      tilt stand.

      For my first M100, I had modified a book light to attach to the
      BCR port
      to provide light for the LCD. I wasn't especially happy with it as
      the
      clear plastic bezel is too glossy and reflected too much of the
      light. I
      feel like if there were any possible enhancement here, it would
      need to
      be some sort of front light mounted internally. This is probably
      outside
      of how much effort I want to put into this.

      Interested in hearing about any experience and efforts into trying to
      improve the readability of the LCD.

-------------- next part --------------
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------------------------------

Message: 4
Date: Wed, 1 Oct 2025 11:08:32 +1000
From: Dave Everett <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID:
    <CAG61pbed2Za1mtux27b=z3x37hqa6nhlndmycd8df5rwf3z...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Check out the description for these:

https://ebay.us/m/drkr36


Dave

On Wed, 1 Oct 2025 at 11:04, Scott McDonnell <[email protected]>
wrote:

1200 baud seems to be the most reliable. 9600 is possible, though.
On 9/30/2025 8:50 PM, Dave Everett wrote:

What was the max baud rate for the m100? I regularly use transceiver
modules that do ttl rs-232. They run at 9600 but from memory that can be
changed. I just don?t recall if it can go lower.

Dave

On Wed, 1 Oct 2025 at 08:50, Scott McDonnell <[email protected]>
wrote:

I plan to dedicate one of my Model 100s to use as a controller for my
80s robots.

These are my planned mods to implement this:

1. Internal retro wifi modem (oldnet.com)

        I plan to make hack onto the MC14412 chip. I have no plan to
retain the original modem functionality, but if I did, I am thinking I could implement this via the modem enable signal. That would also allow me to control power to the ESP8266 so that it did not drain the battery
when not in use. I could bring the enable line out to a switch to
reconnect the enable line to the MC14412. At the moment, I can't really
think of why I might ever want the original modem.

I will use a Wemos D1 mini with an external antenna that I will attach
to the M100 body.

2. Complete my originally idea to port the TPDDuino project to the
sparkfun openlog hardware and make this internal

       Here, I am thinking the BCR TTL serial mod would be appropriate. This frees up the serial port which I will need for the robot control. Not sure if TSDOS already supports this, however. There could could be
some benefits to the faster speed possible with the BCR hack.

3. Wireless serial

       For this, I have not decided whether to use bluetooth or an HC-12 module. This will be in an external modules so that I can use the serial port for other purposes. I do plan to add a fused 5V output to pin 25 of the serial port. This was a common pin to use back in the day for adding a power output. It doesn't appear to be connected to ground in the M100
per the schematics, but I will need to double-check.

4. Joystick mod mentioned previously

       If I will be using the BCR port for the TPPDuino, then I will end
up implementing the ideas discussed in that thread for using the
parallel port. But I also might just hack into the keyboard matrix
arrows since this will be dedicated for this purpose. Still weighing
this while I work on the other mods.

-----------------------

Interested in internal battery hacks. I have been thinking of installing
a 7.2V nimh pack. I am not really sure it could fit anywhere inside,
though.

While looking through old magazines, I had seen products that were
available at the time which were battery packs that also doubled as tilt
stands. I liked the look of those and might end up 3-D printing
something like that. There was a simpler project to use a PVC pipe with
D cell batteries and the author fashioned that to also act as a tilt
stand.

For my first M100, I had modified a book light to attach to the BCR port to provide light for the LCD. I wasn't especially happy with it as the clear plastic bezel is too glossy and reflected too much of the light. I feel like if there were any possible enhancement here, it would need to be some sort of front light mounted internally. This is probably outside
of how much effort I want to put into this.

Interested in hearing about any experience and efforts into trying to
improve the readability of the LCD.


-------------- next part --------------
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URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/ attachments/20251001/4fc51a02/attachment-0001.htm>

------------------------------

Message: 5
Date: Wed, 1 Oct 2025 03:10:05 -0400
From: Scott McDonnell <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

They look like expensive versions of the HC-12 modules.

https://www.amazon.com/433Mhz-Wireless-Replace-Bluetooth-Antenna/ dp/B0C7M99BQM


On 9/30/2025 9:08 PM, Dave Everett wrote:
Check out the description for these:

https://ebay.us/m/drkr36


Dave

On Wed, 1 Oct 2025 at 11:04, Scott McDonnell
<[email protected]> wrote:

      1200 baud seems to be the most reliable. 9600 is possible, though.

      On 9/30/2025 8:50 PM, Dave Everett wrote:
      What was the max baud rate for the m100? I regularly use
      transceiver modules that do ttl rs-232. They run at 9600 but from       memory that can be changed. I just don?t recall if it can go lower.

      Dave

      On Wed, 1 Oct 2025 at 08:50, Scott McDonnell
      <[email protected]> wrote:

          I plan to dedicate one of my Model 100s to use as a
          controller for my
          80s robots.

          These are my planned mods to implement this:

          1. Internal retro wifi modem (oldnet.com <http:// oldnet.com>)

          ?? ? ?I plan to make hack onto the MC14412 chip. I have no
          plan to
          retain the original modem functionality, but if I did, I am
          thinking I
          could implement this via the modem enable signal. That would
          also allow
          me to control power to the ESP8266 so that it did not drain
          the battery
          when not in use. I could bring the enable line out to a
          switch to
          reconnect the enable line to the MC14412. At the moment, I
          can't really
          think of why I might ever want the original modem.

          I will use a Wemos D1 mini with an external antenna that I
          will attach
          to the M100 body.

          2. Complete my originally idea to port the TPDDuino project
          to the
          sparkfun openlog hardware and make this internal

          ?? ? Here, I am thinking the BCR TTL serial mod would be
          appropriate.
          This frees up the serial port which I will need for the robot
          control.
          Not sure if TSDOS already supports this, however. There could
          could be
          some benefits to the faster speed possible with the BCR hack.

          3. Wireless serial

          ?? ? For this, I have not decided whether to use bluetooth or
          an HC-12
          module. This will be in an external modules so that I can use
          the serial
          port for other purposes. I do plan to add a fused 5V output
          to pin 25 of
          the serial port. This was a common pin to use back in the day
          for adding
          a power output. It doesn't appear to be connected to ground
          in the M100
          per the schematics, but I will need to double-check.

          4. Joystick mod mentioned previously

          ?? ? If I will be using the BCR port for the TPPDuino, then I
          will end
          up implementing the ideas discussed in that thread for using the           parallel port. But I also might just hack into the keyboard
          matrix
          arrows since this will be dedicated for this purpose. Still
          weighing
          this while I work on the other mods.

          -----------------------

          Interested in internal battery hacks. I have been thinking of
          installing
          a 7.2V nimh pack. I am not really sure it could fit anywhere
          inside, though.

          While looking through old magazines, I had seen products that
          were
          available at the time which were battery packs that also
          doubled as tilt
          stands. I liked the look of those and might end up 3-D printing           something like that. There was a simpler project to use a PVC
          pipe with
          D cell batteries and the author fashioned that to also act as
          a tilt stand.

          For my first M100, I had modified a book light to attach to
          the BCR port
          to provide light for the LCD. I wasn't especially happy with
          it as the
          clear plastic bezel is too glossy and reflected too much of
          the light. I
          feel like if there were any possible enhancement here, it
          would need to
          be some sort of front light mounted internally. This is
          probably outside
          of how much effort I want to put into this.

          Interested in hearing about any experience and efforts into
          trying to
          improve the readability of the LCD.

-------------- next part --------------
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------------------------------

Message: 6
Date: Wed, 01 Oct 2025 07:33:26 -0400
From: Justin Poirier <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset="UTF-8"

No comment on the other hardware, but I will comment on the battery
possibilities. These machines will gladly run on the 5V that a portable USB battery bank puts out. I have made many USB-to-DC barrel connectors to run my 102 and 200s on the go. Not only do you get the power density
of lithium chemistry, but you also get the pack's built-in charge
controller so you can just plug it in and recharge it like anything
else that charges via USB. Some battery backs support pass-through
charging as well so they can supply power while being charged. (This is
not always the case, and not often advertised as a feature so you may
have to test a few different battery packs to find one that supports
this.)

Find a good battery bank and then 3-D print the supports and legs to
make it a good fit for tilting the machine (maybe velco would be fine
to make it easily removable) and you're done from an electrical
perspective.

--Justin

On Tue, 2025-09-30 at 18:49 -0400, Scott McDonnell wrote:
I plan to dedicate one of my Model 100s to use as a controller for my
80s robots.

These are my planned mods to implement this:

1. Internal retro wifi modem (oldnet.com)

?? ? ?I plan to make hack onto the MC14412 chip. I have no plan to
retain the original modem functionality, but if I did, I am thinking
I
could implement this via the modem enable signal. That would also
allow
me to control power to the ESP8266 so that it did not drain the
battery
when not in use. I could bring the enable line out to a switch to
reconnect the enable line to the MC14412. At the moment, I can't
really
think of why I might ever want the original modem.

I will use a Wemos D1 mini with an external antenna that I will
attach
to the M100 body.

2. Complete my originally idea to port the TPDDuino project to the
sparkfun openlog hardware and make this internal

?? ? Here, I am thinking the BCR TTL serial mod would be appropriate.
This frees up the serial port which I will need for the robot
control.
Not sure if TSDOS already supports this, however. There could could
be
some benefits to the faster speed possible with the BCR hack.

3. Wireless serial

?? ? For this, I have not decided whether to use bluetooth or an HC-
12
module. This will be in an external modules so that I can use the
serial
port for other purposes. I do plan to add a fused 5V output to pin 25
of
the serial port. This was a common pin to use back in the day for
adding
a power output. It doesn't appear to be connected to ground in the
M100
per the schematics, but I will need to double-check.

4. Joystick mod mentioned previously

?? ? If I will be using the BCR port for the TPPDuino, then I will
end
up implementing the ideas discussed in that thread for using the
parallel port. But I also might just hack into the keyboard matrix
arrows since this will be dedicated for this purpose. Still weighing
this while I work on the other mods.

-----------------------

Interested in internal battery hacks. I have been thinking of
installing
a 7.2V nimh pack. I am not really sure it could fit anywhere inside,
though.

While looking through old magazines, I had seen products that were
available at the time which were battery packs that also doubled as
tilt
stands. I liked the look of those and might end up 3-D printing
something like that. There was a simpler project to use a PVC pipe
with
D cell batteries and the author fashioned that to also act as a tilt
stand.

For my first M100, I had modified a book light to attach to the BCR
port
to provide light for the LCD. I wasn't especially happy with it as
the
clear plastic bezel is too glossy and reflected too much of the
light. I
feel like if there were any possible enhancement here, it would need
to
be some sort of front light mounted internally. This is probably
outside
of how much effort I want to put into this.

Interested in hearing about any experience and efforts into trying to
improve the readability of the LCD.




------------------------------

Message: 7
Date: Wed, 1 Oct 2025 07:51:41 -0400
From: Scott McDonnell <[email protected]>
To: [email protected]
Subject: Re: [M100] This is my plan
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8; format=flowed

Of course! Total mental blackout on my part.

There are even DIY kits that could be fitted into a custom 3D printed stand.

On 10/1/2025 7:33 AM, Justin Poirier wrote:
No comment on the other hardware, but I will comment on the battery
possibilities. These machines will gladly run on the 5V that a portable USB battery bank puts out. I have made many USB-to-DC barrel connectors to run my 102 and 200s on the go. Not only do you get the power density
of lithium chemistry, but you also get the pack's built-in charge
controller so you can just plug it in and recharge it like anything
else that charges via USB. Some battery backs support pass-through
charging as well so they can supply power while being charged. (This is
not always the case, and not often advertised as a feature so you may
have to test a few different battery packs to find one that supports
this.)

Find a good battery bank and then 3-D print the supports and legs to
make it a good fit for tilting the machine (maybe velco would be fine
to make it easily removable) and you're done from an electrical
perspective.

--Justin

On Tue, 2025-09-30 at 18:49 -0400, Scott McDonnell wrote:
I plan to dedicate one of my Model 100s to use as a controller for my
80s robots.

These are my planned mods to implement this:

1. Internal retro wifi modem (oldnet.com)

   ?? ? ?I plan to make hack onto the MC14412 chip. I have no plan to
retain the original modem functionality, but if I did, I am thinking
I
could implement this via the modem enable signal. That would also
allow
me to control power to the ESP8266 so that it did not drain the
battery
when not in use. I could bring the enable line out to a switch to
reconnect the enable line to the MC14412. At the moment, I can't
really
think of why I might ever want the original modem.

I will use a Wemos D1 mini with an external antenna that I will
attach
to the M100 body.

2. Complete my originally idea to port the TPDDuino project to the
sparkfun openlog hardware and make this internal

   ?? ? Here, I am thinking the BCR TTL serial mod would be appropriate.
This frees up the serial port which I will need for the robot
control.
Not sure if TSDOS already supports this, however. There could could
be
some benefits to the faster speed possible with the BCR hack.

3. Wireless serial

   ?? ? For this, I have not decided whether to use bluetooth or an HC-
12
module. This will be in an external modules so that I can use the
serial
port for other purposes. I do plan to add a fused 5V output to pin 25
of
the serial port. This was a common pin to use back in the day for
adding
a power output. It doesn't appear to be connected to ground in the
M100
per the schematics, but I will need to double-check.

4. Joystick mod mentioned previously

   ?? ? If I will be using the BCR port for the TPPDuino, then I will
end
up implementing the ideas discussed in that thread for using the
parallel port. But I also might just hack into the keyboard matrix
arrows since this will be dedicated for this purpose. Still weighing
this while I work on the other mods.

-----------------------

Interested in internal battery hacks. I have been thinking of
installing
a 7.2V nimh pack. I am not really sure it could fit anywhere inside,
though.

While looking through old magazines, I had seen products that were
available at the time which were battery packs that also doubled as
tilt
stands. I liked the look of those and might end up 3-D printing
something like that. There was a simpler project to use a PVC pipe
with
D cell batteries and the author fashioned that to also act as a tilt
stand.

For my first M100, I had modified a book light to attach to the BCR
port
to provide light for the LCD. I wasn't especially happy with it as
the
clear plastic bezel is too glossy and reflected too much of the
light. I
feel like if there were any possible enhancement here, it would need
to
be some sort of front light mounted internally. This is probably
outside
of how much effort I want to put into this.

Interested in hearing about any experience and efforts into trying to
improve the readability of the LCD.



------------------------------

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------------------------------

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************************************



------------------------------

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End of M100 Digest, Vol 178, Issue 2
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