Recent content by behines

I recently was working on this problem as well. For the reasons mentioned by SirRichard I decided that I wanted to include the BS170. The fix amounted to this simple haywire. For those only following this thread, I wrote up the details in here.

The concept of a wireless keyboard really set my head swirling with possibilities. Suddenly the "right" solution seems so natural - Bluetooth. This is exactly the sort of thing it's made for. Inside the TRS-80 you have just the MT8808 chip and a ESP32-C3-Zero. The MT8808 is wired in parallel...

Wow, that looks very much like the device I was thinking of making, this is great! A RP2040 with a MT8808! It looks like it's intended to be used in place of the existing keyboard rather than in addition to? Definitely indicates that the idea will work. Looks like you basically just need to...

I continue to slowly spool up on learning my way around my recently acquired TRS-80 Model III. The Gotek drive is a really great thing. However, using sneaker-net to transfer disk images from PC to Gotek is a bit tiresome. I just stumbled across a thing called a "Wifi USB stick", with the...

Thanks, that's an interesting project! I puzzled over it for a while trying to figure out how they could do this with no hardware other than the micro. It finally occurred to me I think it may be doing the opposite of what I want to do. It appears that you unplug the keyboard from the...

This is a really interesting thread. I am interested in developing a joystick port (up/down/left/right/space), that can also potentially act as a USB keyboard port, so I've been studying what everyone has said. I've spent some time over the last couple of days doing a further deep dive on...

I took a few photos of my Thingiverse build of the dual Gotek-FreHD bracket. Here's photo 1. Ignore the items I've marked with an X. (I have added an internal speaker to my TRS-80, and these are the volume knob and sound-disable switch for that.) Note that in the photo there is no plastic...

This did indeed work. The required fix is quite simple. As shown here, you don't put Q1's gate lead into its hole in the board, but instead run it over the to voltage regulator U4 right next to it and solder to its output leg. I'll note that 1) This is the OnSemi version of the B170. I've...

Awesome, thanks Larry! Okay, I'll order a GreaseWeazle. Sounds like it will just show up as /dev/fd0 in Linux then. I am enjoying trying to restore this old "not tested" floppy drive I bought. The head motor was completely seized when I got it, but following instructions here on the forum I...

Larry, thanks for the advice the other day on writing floppies from Debian. I have an old 5.25" floppy drive, but I do not (at the moment) have an old PC or a floppy controller. I was looking at the Kryoflux before, but now just learned about the Greaseweazle. Seems like almost a no-brainer...

For anyone who happened to follow this, I am standing down on the port to MPLab X, as I got my FreHD working. It was just a bad cable. (My arrogant assertion that my self-made cable was "excellent" turned out to be wrong. I had put the little clamping piece on backwards and wasn't getting a...

Real short summary: Has anyone built the FreHD PIC code in the latest MPLab X? TL;DR: I have built up a FreHD board, but it's not working. I am digging in on diagnosing it. (The board was built by PCBWay per this fab, and I flashed the GAL and PIC with version 2.14 using the images from...

This is an interesting thread. I just learned about KryoFlux, am thinking about getting one. I am working on restoring a vintage Model III drive and would love to have a Dysan alignment diskette. I wondered if the KryoFlux might be flexible enough to allow me to create my own alignment...

Just saw this query. The dual adapter worked okay. I'm pretty happy overall. Two things to be aware of. 1) It is a bit flimsy, so some care is required, but I like how it turned out. I managed to break the thin strip between the two LEDs for the FreHD when pushing them into their holes...

Thanks. I think I'll give that a go then. I'll post back here if I get it working.