Okay, the time has finally come. I'm going to make a new drop-in replacement PCB for the ColecoVision. Other form factors such as portables could be made in the future (but not right now). This is still a ColecoVision; I've been calling it a CV-1.2. It's a regular CV with some improvements; it's not the next generation CV-2 with more graphics modes, audio channels, bits, etc.
Here's the feature list of the CV-1.2:
- Component (YPbPr) video output - both RCAs and 1/8" jack provided
- Composite video output - both RCA and 1/8" jack provided - I don't really want to add this, but I'm guessing it's pretty much required, right?
- VGA (pure analog, not an F18A type solution) video output - I'm not sure if this will work yet, so don't count on it
- Audio output - both RCAs and 1/8" jack provided - mono of course, but two outputs available for stereo TVs
- 24K RAM - for Adam conversions such as Super Zaxxon and Dragon's Lair
- Static RAM for VDP - instead of DRAM
- Extra controller ports - to use 2 button Atari 7800 (or 2600), Sega SMS, Sega Genesis controllers
- Extra keypad support - could be added on the top of the CV console (useful if using Atari or Sega controllers)
- Easily replaceable controller input chips
- Single +5V input - either via standard CV power supply or smaller/efficient adapter
- Internally created -5V and +12V output - Atari Expansion Module support
- Output voltage for Roller controller - via standard CV power jack
- Power on LED - multicolour
- Alternate BIOSes - standard 10s delay, 3s delay, 10s/fire delay, etc.
- Pause button - capacitive so it's hidden (hopefully), also turns on light, and turns off audio output
- Built-in 31 game multi-"cart" - activated if no game is inserted
- Expansion module circuitry remains - for SGM and Atari Expansion Module support
- All new parts used - except for VDP and audio, which use NOS (new old stock) parts
- Fits in standard CV case - existing holes in back of CV will likely line up with A/V output and power input
The features listed are meant to improve the quality of play of the system, for instance by adding proper video outputs, extra controller/keypad inputs, pause switch, and the simple multicart. The reliability of the system is improved by using static RAM for the VDP, allowing a standard 5V power adapter to be used (this should also make the power switch less finicky), making the controller input chips easy to replace, and using brand new parts.
If there are features missing that you think should be added, please feel free to discuss.
Unfortunately, this isn't going to be cheap. As usual, I'll do my best to make it as affordable as possible. I'd also like to make a bare-bones version that is still reliable, but doesn't provide some of the extras such as multicart, extra controller inputs, etc.
As mentioned, a 31 game multi-"cart" is included. I don't want to add games that I don't have permission to include, so if there's anyone who has games or utilities that could be added, whether it be full or demo versions, please contact me. I'm not sure what kind of compensation could be given, but that's all up for discussion, I guess.
Edited by 5-11under, Tue Sep 3, 2013 8:21 AM.