Mega Drive (JAP) technical info
From MegaWiki
Contents |
Processors
- Primary: Motorola MC68000 CPU with 7.67 MHz (NTSC) or 7.60 MHz (PAL)
- Secondary: Zilog Z80 CPU with 3.84 MHz (NTSC) or 3.80 MHz (PAL)
Memory
- 64 KB for MC68000
- 8 KB for Z80
- 64 KB for VDP (pattern tables and graphics)
- 128 Bytes for VDP (colors)
- 80 Bytes for VDP (vertical scroll)
- 4 MB for ROM (address range for cartridge)
Graphics
- 16-Bit VDP for playfields and sprites
- 3 graphic planes, 1 sprite plane and 2 scrolling planes
- 64 out of 512 colors at the same time
- 320x224 resolution graphic displaymode
- 40x28 resolution text displaymode
Sound
- Yamaha YM2612 FM (6 channels and PCM)
- Texas Instruments TI76489 PSG
I/O
- Cartridge slot
- 2 Joystick ports
- Extension port (only on early models)
- Bus expansion port (used for Mega CD)
- Headphone jack (only model 1)
- Powersupply connector
- A/V port (diffent pin assignment on model 2)
