315-5309: Difference between revisions
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The 315-5309 is found on early revision of the MegaDrive I. | The 315-5309 is found on early revision of the MegaDrive I. | ||
Revision as of 23:27, 13 June 2012
The 315-5309 is found on early revision of the MegaDrive I.
It handle the IO port and the version register
Pinout
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