Master System

From HwB

Console manufactured by Sega.


Technical specs

CPU: Zilog Z80, 3.54MHz (PAL/SECAM) / 3.57MHz (NTSC)
  • 8 kB (Main RAM)
  • 16 kB (Video RAM)
ROM: 8 kB to 256 kB (depending on built-in game)
Video chip: 315-5124 (VDP, Video Display Processor) derived from Texas Instruments TMS9918
Graphic modes:
  • 256 x 192 pixels
  • 256 x 224 pixels
  • 256 x 240 pixels (PAL/SECAM only)
Sound chip (PSG): Texas Instruments SN76489
Sound chip (FM): Yamaha YM2413


  • Master System Card (not available in the Master System II)
  • Cartridge
    • Japanese and South Korean consoles use 44-pin cartridges, same shape as Mark I and Mark II
    • All other consoles use 50-pin cartridges with a different shape
    • The difference in cartridge style is a form of regional lockout
  • Expansion
  • Joystick
  • Audio/Video
  • Power, 9V DC 1A Negative Tip
  • RF (Channel 36)