TheRetroChannel | TRS-80 CoCo2 RAM and ROM upgrades @TheRetroChannel | Uploaded October 2020 | Updated October 2024, 7 hours ago.
We take this 16K CoCo2 with colour basic and see if we can make it a little more usable, without even taking the time to research how…

🛍️ Tindie store: tindie.com/stores/theretrochannel
🛠 Tools and kit: patreon.com/posts/tools-and-kit-77570017
💬 Discord: discord.gg/393FYaM6gM
😎 Ad-free, early access: patreon.com/theretrochannel

🎞
0:00 Intro
1:20 Work to be done
5:18 Burning the ROM image
7:54 Installing Extended Color Basic
10:00 Checking RAM voltages
11:45 Mods for the new RAM
14:05 More voltage tests
14:53 Mods done – time to test
15:34 Results
🎞

🔗
BIOS ROM Images (not my site): http://cominf0.narod.ru/mess130.htm
2364 TO 2764 DIY adapter: blog.worldofjani.com/?p=757# https://symlink.dk/nostalgia/c64/rom/ ist.uwaterloo.ca/~schepers/roms.html
Why only 24K is displayed when I have 32 or 64K: subethasoftware.com/2016/01/19/64k-trs-80-coco-memory-test

If the colours in Zaxxon look weird to you, this is what we had in PAL land, yep ugly greens and purple. There’s an article about the difference between PAL and NTSC artefact colours here: en.wikipedia.org/wiki/Composite_artifact_colors
🔗

Thanks for watching!

#colorcomputer #TRS-80 #CoCo