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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. >> >>
