Platform - Console » Master System (PSG)
This platform is for PSG sound from Texas Instruments SN76489 chip when used in 8-bit Sega console Master System and its less famous predecessors: SG-1000, SC-3000, SG-1000 II & Mark III
While Nintendo dominated 8-bit console markets in the USA and Japan, Master System was popular in many European countries and Brazil.
In the USA Nintendo gave such licenses for game publishers which did not allow publishers to make ports for other platforms. This reduced the availability of Master System games dramatically in the USA (these kind of policies were banned in the USA in 1991). Those same publishers however sold Master System games in Europe.
All these 8-bit Segas share the same Texas Instruments SN76489 sound chip, which allows 4 channel mono sound: 3 Square Waves and 1 White Noise. While older Segas use the original SN76489 chip, Master System actually have clone called SN76489A (Japanese Master System & Mark III also have an FM sound chip which has a platform of its own here at CVGM).
Earlier Segas also use the same sound chip. The very first sega console is SG-1000 (1983) and its computer variant is SC-3000 which had keyboard and floppy drive. SG-1000 II was an updated version of console released in 1984 and Sega Mark III (1985) was the first version of Master System. The systems are downwards compatible. The most important differences are in graphic output features.
In Europe and Brazil Sega released Master System II (1990) which had different case. In Brazil there is also Master System III and some other variations such as wireless Master System Compact and pink Master System Girl aimed at female consumers. Master Systems are still being produced in Brazil.