• The Master System's CPU is an 8-bit Zilog Z80. The maximum addressable memory is 64 kB. • Graphics: Texas Instruments TMS9918A Up to 32 simultaneous colors Screen resolutions 256×192 and 256×224. PAL/SECAM also supports 256×240 8×8 pixel characters, max 463 (due to VRAM space limitation) 8×8 or 8×16 pixel sprites, max 64 Horizontal, vertical, and partial screen scrolling • Sound 4 channel mono sound (3 Square Waves, 1 White noise) 3 tone generators, 10 octaves each, 1 white noise generator Sound (FM): Yamaha YM2413 Mono FM synthesis Switchable between 9 tone channels or 6 tone channels + 5 percussion channels Included as a built-in "accessory" with the Japanese Master System (1987) Supported by certain games only • Onboard RAM : Boot ROM: 64 kbit (8 KB) to 2048 kbit (256 KB), depending on built-in game Main RAM: 64 kbit (8 KB), can be supplemented by game cartridges Video RAM: 128 kbit (16 KB) • Game Card slot (not available in the Master System II) • Game Cartridge slot (not included on newer Brazilian models, as these have built-in games) Japanese and South Korean consoles used 44-pin cartridges, the same shape as SG-1000 cartridges All other consoles use 50-pin cartridges with a wider shape The difference in cartridge style is a form of regional lockout Expansion slot Unused, pinout compatible with 50-pin cartridges (but opposite gender) in all regions
