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Tim - are you including the TP-10 and serial cable as well, or was that just to test and make sure the serial port is working? (I will mention it on this weekend's Coco Nation Show, to give people in the area another bit of incentive to attend Tandy Assembly. 🙂)

which model of 5 pin din plug you used? i can see in your video you just have one trs plug i just need the data in from the pc to make it work?

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Videos like yours inspired me to dig up my old coco 3 and go through this process. Unfortunately, I ventured into my parents' attic and could not find it. I'm going to have to wait until summer is over to inspect every corner of the attic to confirm it really is MIA. (It's too damn hot.) I'm not sure if finding it will be a blessing or a curse. 😀

Thank you for this video. It has helped me build my cable. Just wondering, what is that in your expansion port? The piece with the SD card in it? Do you have a video on that? Thanks again.

Fantastic step by step guide. I’m new to Linux and your guide made everything so easy to setup. I’ve subscribed to your channel and I’m looking forward to more great content!

This is fascinating! My father was an inventory specialist and later a buyer for the Westfield Digital location!

i had my color computer 2 running on 8 d-cell batterys

I thought the model4 had no cassette port?

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The Albuquerque public schools had a PDP-11 and Dec System 10 computers and a single VT-100 terminal that students could use along with a lot of TTYs. DEC was making the terminals in Albuquerque at the time so I suspect that is why the school had the DEC equipment. I have a stick of 8080's that a schoolmate gave me back then that I'm sure came from DEC meant to be in at VT-100.

Super helpful, just came into possession of a CoCo 2 and it is missing this cable. Time to break out the solder, cheers!

Thanks you for this video. I never new high schools had PDP-11 computers.

This is awesome! I grew up in Shrewsbury but didn't hit SHS until the 90's so missed the boat on a lot of this fun, tech. Got my PiDP-11 sitting here though and someday, when I'm settled a little more, I hope I'll be able to find one of those older terminals to hook up to it... Thank you for sharing!

Completely the same story! Fitchburg High School (massachusetts), late 80's we had the PDP11 in the computer room. The poor math teacher taught some basic classes and this terminal is where I started my programming life. My senior year, they threw out the PDP11 and all the terminals. The math teacher kept one VT100 and gave it to me when I graduated because I was his best student. I went on to bring that terminal to college at Lowell where the VT100 was connected through the modem to the computer science lab and I was in an exclusive club of one; students who could program on the college servers from his dorm room. Got me a leg up for sure. To think 25 years later I'm a chief architect at Dell and this is how it all started for me. Thanks for making the video because it had me saying "no way...." several times. If I ever came across a VT100, I would definitely scoop it up and have it in the background of my zoom office.

Did you ever find a permanent solution? My transformer is completely blown on mine and but I was able to at least see the machine power on using the usb setup from your last video.

Is there a good syntax highlighting editor that you know of that would run on MacOS?

Thank you for the walk through, It helped me with my Mac. Now I'm all set up and ready to rock and roll. I hope you will be posting video's of the Tandy Assembly presentation you are doing so those of us who can't make it can see and learn.

What an amazingly thorough and detailed walk through. I especially appreciated you covering Mac OS X. Thank you for helping to keep the TRS-80 community alive and allowing me to relive my youth. And thanks to George Phillips for the extraordinary work with writing a toolchain that allows us to write our software on modern workstations.

Great job Tim!

I really enjoyed this video too. Great job Tim! I was 16 when I first played Haunted House on my best friends TRS80. We also played an adventure game that had something to do with chasing down a "saboteur" in a nuclear power plant...(I think)...does anyone know the name of this game? I remember collecting different colored keys, throwing a recorder through a window to get the yellow key. Its funny what little shreds got stuck in my memory!

nice

In general do you have to replace the capacitors on these before using them? I hear they can explode if they're very old.

I was about to put a comment about the computerarcheology site but I see you already mentioned it on your other video.

I used to be mesmerised by those asterisks. I could often tell if the program was going to load just by how they flashed.

The best programming video I've seen, not boring, explaining all the way thru, thanks, great content! Thumbs up!

Where do you look to find stuff like this? I have found coco's at flea markets once in awhile..

Absolutely brilliant, Tim! I recall buying Haunted House back in 1979 or so when I was around 10 years old. I recall the joy I felt when I actually got to the second level/load, and it was so annoying! Nice upgrade!

Hello! If you don't mind, I have a question. I have successfully converted a Model III keyboard to USB using an arduino, however, the Model I's keyboard eludes me. Both keyboards have 20 pin connectors (off top of my head) but the Model I seems to handle the input very differently. Would you happen to have any insight about the Model I keyboard circuitry you would care to share? FYI: All mods I've done are non-destructive so the machines can be restored to original condition.

I had actually watched it, but, not being a hardware guy, I probably didn't understand a lot of it. :)

Part of the reason that more power is drawn when the cassette is in use is the CoCo driving the cassette motor control relay. If you disconnect that, you can probably reduce the power requirement a bit.

I think you may want to bypass the built-in 5v regulator and supply the other voltages directly (e.g. use the regulated 5v from the USB and then create a more efficient +/- regulated rails from that... Probably an isolated brick)

What current/voltage? I would expect around 500-750mA. But the cocsdc + two joysticks may get close to an amp?

Should be possible to put ftdi USB chip on board and bypass the whole +/-12v rs232 stuff to get the bit banger going (at 5v). But it would probably need to run on a powered hub for that

The serial will not work as it requires +-12V (well, closer to +-10V actually).