Uploaded February 2023 | Updated September 2026, 6 hours ago
This is a Colecovision console built on a breadboard. It can accept original cartridges and one joystick. Soldering was only required for the cartridge and joystick connectors, and other than that every wire is unsoldered. Of course, this system generates a lot of noise that can be heard as a buzz on the speaker.
The system is greatly simplified by using a TMS9118 video processor (it only requires two memories instead of eight and can generate the clock signal for the Z80), and a 6116 RAM memory (only 1K is used instead of 2 2114 memories). Some further adaptations like using a 74LS245 for the joystick port (it was the only chip I had, instead of the somewhat rare 74LS541), and no second player, and of course no expansion slot.
It was incredibly hard to make the video processor to oscillate correctly.
For more retro things you can visit my website at nanochess.org
The schematics for the Colecovision come from wiki.console5.com/wiki/Colecovision
#retro #retrogaming #retrogames #z80 #colecovision #homebrew #breadboard
This is a Colecovision console built on a breadboard. It can accept original cartridges and one joystick. Soldering was only required for the cartridge and joystick connectors, and other than that every wire is unsoldered. Of course, this system generates a lot of noise that can be heard as a buzz on the speaker.
The system is greatly simplified by using a TMS9118 video processor (it only requires two memories instead of eight and can generate the clock signal for the Z80), and a 6116 RAM memory (only 1K is used instead of 2 2114 memories). Some further adaptations like using a 74LS245 for the joystick port (it was the only chip I had, instead of the somewhat rare 74LS541), and no second player, and of course no expansion slot.
It was incredibly hard to make the video processor to oscillate correctly.
For more retro things you can visit my website at nanochess.org
The schematics for the Colecovision come from wiki.console5.com/wiki/Colecovision
#retro #retrogaming #retrogames #z80 #colecovision #homebrew #breadboard
