Originally Posted by JJT_Defender

1. Liugi Ruffolo what is with the temperature, cool, hot, warm for NTSC and PAL?
2. What does it mean?

Nothing relevant. This just impacts the colour palette.

Cool: Hue Separation of ~25.7 degrees. This is the ‘factory’ setting and instructed method, per the CPS 7800 Diagnostic Test Cartridge, to calibrate the system’s color pot located on the motherboard just below the cartridge slot. This seems typically to have been set within a minute or two of a system being powered on, as many factory set consoles appear to drift higher in hue separation as the system continues to warm up. Some early titles have their colors represented best at this setting such as Galaga and Joust. Titles that have their colors best showcased under “Cool” look their worst under “Hot”.

Hot: Hue Separation of ~27.7 degrees. This is the ‘typical’ setting often experience after a console has been running continuously for 15-30 minutes. Most late release titles such as Midnight Mutants and Ikari Warriors, as well as the earlier released Choplifter, display optimal colors when the palette is provisioned this way. Game colors looking best “Hot” have the least favorable appearance under “Cool”.

Warm: Hue Separation of ~26.7 degrees. This is the ‘ideal’ setting as it best matches official documentation on the color order for the console, including a full 256 unique colors palette for the system. It allows for some system warm-up, resulting in several games yielding colors neither at their best or worst. However, other games do yield best color results with a “Warm” palette. Scrapyard Dog, for example, results in a fence and sky having the best balance of colors. Some games, such as Dig Dug, look excellent regardless of temperature.

For more information regarding colors, see the 7800 Color Documentation page located on the 7800.8bitdev.org site: http://7800.8bitdev.org/index.php/At..._Documentation