A view of the entrance to our permanent exhibition of home computers from the 1970s and 1980s. All devices are fully functional and accessible to our visitors.
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CoCo1 Composite Video
https://www.leadedsolder.com/2025/07/15/tandy-trs80-coco-composite-mod-aquarius.html
#HackerNews #CoCo1 #Composite #Video #TandyTRS80 #RetroTech #VideoMod #CompositeVideo
When I got the CoCo, one of the big problems was the super-smeary, snowy video on the RF-out. Even though composite video is generated internally by the video circuitry of the computer, Tandy didn’t end up breaking it out to an actual port. Lots of other 8-bit machines of the era are in the same boat. Luckily, adding a composite video port to the CoCo is very straightforward! So straightforward, in fact, that I did it twice.
Oops. I thought I'd clean the heads of the disk drives on the Tandy TRS-80 before trying them with the machine. The head on the top side fell off.
It seems it was just glued on, so I applied some fresh glue and stuck it on again. The good news: this was not the boot drive. The bad news: it doesn't seem to be working. Maybe I messed up the head alignment? Guess I need to hook up the oscilloscope and check the signal coming from the head.
At least the boot drive is working, and for the first time in my life I booted up a TRS-80 from disk.
Interesting mods as well, to select between 40 and 80 track operation.
Oh, and it turned out the heads weren't that dirty to begin with, probably didn't need a clean anyway.
#RetroComputing #Tandy #TandyTRS80 #TRS80 #Electronics #ElectronicsRepair
My contribution to #SepTandy. Thanks to @[email protected] for the reminder. Upgrade TANDY TRS-80 MODEL 100 with 1Mb REX# Memory Expansion.
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