Uploaded September 2023 | Updated September 2026, 2 weeks ago
It's time to upgrade the stock 128K Tandy memory in my Radio Shack TRS-80 Color Computer 3 to a whopping 512K. We then discuss upgrading the stock 6809E CPU with a Hitachi 63B09E CPU and recapping the CoCo 3 to future proof the machine! Let's go #SepTandy!
DISCLAIMER: Please do not take this video as a tutorial / advice. I'm not an expert, this is just my hobby :)
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youtube.com/geekwithsocialskills?sub_confirmation=1
--- Video Index
0:00 - Tandy Radio Shack TRS-80 Color Computer 3 Memory Upgrade
0:53 - Checking out the stock Tandy 128K CoCo 3 badge
1:57 - TRIAD 512K SRAM Memory and Upgraded 512K badge by CLOUD-9
2:25 - Bottom of TRS-80 Color Computer 3 and warranty sticker
3:26 - Removing the factory Radio Shack void if removed warranty sticker
4:02 - Opening the Tandy Color Computer 3 case
4:45 - Starting the CLOUD 9 TRIAD 512K memory upgrade process
5:46 - It's time to remove the stock KM41464AP-12 memory chips
6:20 - Installing the TRIAD 512K SRAM memory PCB
6:33 - Removing the original Tandy CoCo 3 128K badge
7:54 - Cleaning up the old badge glue from the computer case
8:05 - Installing the new Tandy 512K computer badge
8:23 - The new TANDY 512K Color Computer 3 badge looks freaking amazing!
8:41 - Chatting about recapping the motherboard
8:46 - Discussing upgrading the stock 6809E CPU with a Hitachi 63B09E CPU
9:09 - Powering up after upgrading the Color Computer memory
9:28 - Outro
9:47 - Sneak peek of an upcoming video with my 2-XL Robot from the 1970s
--- Video Links
I upgraded my CoCo 3 to 2048K of memory:
youtube.com/watch?v=L6poiGLmf4A
CoCo 3 Hitachi 63B09E CPU Upgrade:
youtube.com/watch?v=PSViEE9zTnU
Geek With Social Skills Tandy Playlist:
youtube.com/playlist?list=PLOgohYmiitqmrq43DjhwWpHvEQwk2CKa4
TRIAD 512K SRAM Upgrade from Cloud-9:
cloud9tech.com/Cloud-9/Hardware/Triad.html
Hitachi 6309 CPU from Retro Rewind:
retrorewind.ca/63b09e
RGB Switch-a-roo SCART cable by the CoCo Man:
https://cocoman.onlineweb.shop/details/p7004829_20319861.aspx
CoCo 3 cap kit from Console5:
console5.com/store/tandy-radio-shack-color-computer-3-cap-kit-coco3.html
SepTandy Playlist:
youtube.com/hashtag/septandy
--- Channel Links
View this video on the Geek With Social Skills website:
geekwithsocialskills.com/tandy-coco-3-ram-expansion-upgrade
#computerknowledge #retro #technology
It's time to upgrade the stock 128K Tandy memory in my Radio Shack TRS-80 Color Computer 3 to a whopping 512K. We then discuss upgrading the stock 6809E CPU with a Hitachi 63B09E CPU and recapping the CoCo 3 to future proof the machine! Let's go #SepTandy!
DISCLAIMER: Please do not take this video as a tutorial / advice. I'm not an expert, this is just my hobby :)
Subscribe:
youtube.com/geekwithsocialskills?sub_confirmation=1
--- Video Index
0:00 - Tandy Radio Shack TRS-80 Color Computer 3 Memory Upgrade
0:53 - Checking out the stock Tandy 128K CoCo 3 badge
1:57 - TRIAD 512K SRAM Memory and Upgraded 512K badge by CLOUD-9
2:25 - Bottom of TRS-80 Color Computer 3 and warranty sticker
3:26 - Removing the factory Radio Shack void if removed warranty sticker
4:02 - Opening the Tandy Color Computer 3 case
4:45 - Starting the CLOUD 9 TRIAD 512K memory upgrade process
5:46 - It's time to remove the stock KM41464AP-12 memory chips
6:20 - Installing the TRIAD 512K SRAM memory PCB
6:33 - Removing the original Tandy CoCo 3 128K badge
7:54 - Cleaning up the old badge glue from the computer case
8:05 - Installing the new Tandy 512K computer badge
8:23 - The new TANDY 512K Color Computer 3 badge looks freaking amazing!
8:41 - Chatting about recapping the motherboard
8:46 - Discussing upgrading the stock 6809E CPU with a Hitachi 63B09E CPU
9:09 - Powering up after upgrading the Color Computer memory
9:28 - Outro
9:47 - Sneak peek of an upcoming video with my 2-XL Robot from the 1970s
--- Video Links
I upgraded my CoCo 3 to 2048K of memory:
youtube.com/watch?v=L6poiGLmf4A
CoCo 3 Hitachi 63B09E CPU Upgrade:
youtube.com/watch?v=PSViEE9zTnU
Geek With Social Skills Tandy Playlist:
youtube.com/playlist?list=PLOgohYmiitqmrq43DjhwWpHvEQwk2CKa4
TRIAD 512K SRAM Upgrade from Cloud-9:
cloud9tech.com/Cloud-9/Hardware/Triad.html
Hitachi 6309 CPU from Retro Rewind:
retrorewind.ca/63b09e
RGB Switch-a-roo SCART cable by the CoCo Man:
https://cocoman.onlineweb.shop/details/p7004829_20319861.aspx
CoCo 3 cap kit from Console5:
console5.com/store/tandy-radio-shack-color-computer-3-cap-kit-coco3.html
SepTandy Playlist:
youtube.com/hashtag/septandy
--- Channel Links
View this video on the Geek With Social Skills website:
geekwithsocialskills.com/tandy-coco-3-ram-expansion-upgrade
#computerknowledge #retro #technology
