Building the COMIX-35 Computer

Описание: In this video I am building the "COMIX-35" replica of the COMX-35 computer from 1983. What's special about this computer is its CPU, an RCA 1802!

This is NOT my project. The replica circuit and PCB have been designed by "Tube Time" in 2020.

All parts are readily available, you don't need to butcher any retro hardware for parts. On Ebay you can find IC kits for this replica.

The Emma emulator package contains lots of software in .comx format, download it from the link below. For loading software over the tape input port, there's a lot of WAV files on The Clueless Engineer's Dropbox, the link is below.

I have published my humble additions to this project on my Google drive:
https://drive.google.com/drive/folder...
There you will find:
My bill of materials (BOM)
The Gerber files for my little micro-USB power adapter board

Thanks to:
Tube Time (User "schlae" on GitHub) for creating this wonderful replica
The makers of the "High Speed Direct Connect" project (Andrew, Hank and Marcel)
Marcel for his Emma emulator
The Clueless Engineer for his YouTube videos that inspired me to build this computer

Photo credits:
Original hardware: www.comx35.com
Keycap profiles: https://commons.wikimedia.org/wiki/Fi..., User "jacobus". The photo has been published under the "Creative Commons Attribution-Share Alike 4.0 International license" (https://creativecommons.org/licenses/..., the modified images in my video can be used under the same license.

Links:
https://github.com/schlae/comix-35
Tube Time's project site, containing the Gerber files for the main board.

https://github.com/etxmato/COMiX-High...
COMiX High Speed Direct Connect project, Gerber files and modified ROMs are available for downloads, I've built the "slim" adapter.

https://hackaday.io/project/178186-co...
COMIX-35 built by "Dave's Dev Lab"

https://retrocomputingforum.com/t/the...
3D-printed case for the COMIX-35

   • 🇭🇰 COMX-35: Part 1 (Does It Work?) [TCE #0...  
The Clueless Engineer's video series on the COMX, the COMIX-35 build starts at Part 5.

https://www.emma02.hobby-site.com/
Emulator for various 1802-based computers including the COMX-35. The package contains a lot of software in .comx format.

https://archive.org/download/comx-35roms
Another COMX-35 software repository

https://www.dropbox.com/scl/fo/b40fzh...
The Clueless Engineer's COMX-35 repository, including many WAV files for loading software over the tape input port.

https://github.com/Fabrizio-Caruso/CR...
https://github.com/Fabrizio-Caruso/CR...
Cross Chase and other cross-platform games made by Fabrizio

https://teratermproject.github.io/ind...
Tera Term Terminal Software

https://ymdkey.com/products/143-125-k...
DSA profile keycaps from YMDK

DTECH USB to TTL Serial 5V Adapter Cable with FTDI FT232RL Chip 6 Pin 0.1 inch Pitch Female Socket Header UART IC Windows 11 10 8 7 Linux MAC OS (6ft, Black)
Amazon Germany:
https://www.amazon.de/DTech-Seriell-A...
Amazon US:
https://www.amazon.com/Serial-Adapter...

Chapters:
0:00 Introduction
2:32 Soldering
3:31 Main board complete
4:05 Checks
7:21 Writing the ROM image to the EPROM
10:44 Populating the IC sockets
11:27 First test without the keyboard
13:18 Missing sound issue fixed
15:08 Key switches and keycaps introduction
20:14 Inserting and soldering the Cherry MX switches
21:11 Inserting the keycaps
22:08 Assembly of the space bar stabilizer
23:42 First test with keyboard
24:40 Tape loading attempts
27:10 High Speed Direct Connect: introduction and soldering
28:29 High Speed Direct Connect: soldering done, transfer cable
29:42 How to load software using the High Speed Direct Connect interface
31:55 Games