315-5309

The 315-5309 is found on early revision of the MegaDrive I.

It handle the IO port, the version register

Pinout

(Max size:File:315-5309_pinout.png)

OpenOffice Draw file : File:315-5309.odg

• IOX_X: To the DE-9 port
• FREQ: +5V = 60Hz, 0V = 50Hz
• LANG: +5V = English, 0V = Japanese
• A0-A6: 68K address bus
• D0-D15: 68K data bus
• ZA0-ZA7: Z80 address bus
• ZD0-ZD7: Z80 data bus