Hello, I know it is starting to be off-topic, but some details about how you did the pi (I assume a zero-w) and the case with the level-shifter would be nice. I've done this with other components, but I've never gotten anything nearly so small. I have a pi-hat with a level shifter, and it basically doubled the size of pi zero. Something this small and that would plug right into the serial port of the m100 would be great.
Jonathan >----Original Message---- >From : [email protected] >Date : 2023-12-13 - 02:11 (CEST) >To : [email protected] >Subject : Re: [M100] 19.2Kbps on the Tandy 102 > >Wow Brian! > >This setup with the Pi attached to the back looks amazing. It's attached >so cleanly as well. I appreciate you doing the `stty' at the end, >hopefully mirroring your setup will help me get things working better on >my end. > >I do wonder if the fact that you are using the Pi's GPIO pins to do >serial instead of a USB adapter is part of why your system is working so >well. If you have a USB adapter floating around, I'd be really curious >if you got the same results with that connected to the PI instead of >connecting it directly. > >Thanks again for sharing your experience getting this working. > >On Tue, Dec 12, 2023 at 05:42:28PM -0500, Brian Brindle wrote: >> This has come up in discussion a few times so I wanted to show that >> 19.2Kbps on the Tandy 100 is possible with only software flow control. >> >> Here is a video of me creating a 500 line 40 col file that is 20KB, >> transferring it to the M102 and back again using the 19.2Kbps serial >> connection. It gets slowed down due to the screen being so slow making >> it absolutely of no value to be running at those speeds but does >> demonstrate that flow control can be used on a Linux device in this >> situation. >> >> Hardware flow control would work best and is what I would recommend but >> I wanted a device that would work on a stock M100/102 and on a M200 >> where the flow control lines do not work properly. >> >> It's apparently really hard to film, type and remember what to say so I >> apologize for that.. >> >> [1]https://youtu.be/BGxx__Zr1O4 >> >> Brian >> >> References >> >> 1. https://youtu.be/BGxx__Zr1O4 >
