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schematics:megadrivecart [2005/11/09 11:40] aidaniischematics:megadrivecart [2005/11/09 11:41] aidanii
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-==== Genesis/Megadrive cartridge pinout ==== 
-The following table describes the pinout for the Genesis/Megadrive cartridge port. With the console facing you, row A is the rearmost row, and row B is the frontmost row. Numbering starts from left to right.\\ 
-\\ 
  
-^pin^Name^Description^-^pin^Name^Description^ 
-|A01|GND|Ground|-|B01|SL1|Sound input left| 
-|A02|5v|VCC1|-|B02|!HRST|Reset| 
-|A03|A08|Address 08|-|B03|SR1|Sound input right| 
-|A04|A11|Address 11|-|B04|A09|Address 09| 
-|A05|A07|Address 07|-|B05|A10|Address 10| 
-|A06|A12|Address 12|-|B06|A18|Address 18| 
-|A07|A06|Address 06|-|B07|A19|Address 19| 
-|A08|A13|Address 13|-|B08|A20|Address 20| 
-|A09|A05|Address 05|-|B09|A21|Address 21| 
-|A10|A14|Address 14|-|B10|A22|Address 22| 
-|A11|A04|Address 04|-|B11|A23|Address 23| 
-|A12|A15|Address 15|-|B12|!YS|Video| 
-|A13|A03|Address 03|-|B13|!VSync|Vsync| 
-|A14|A16|Address 16|-|B14|!HSync|HSync| 
-|A15|A02|Address 02|-|B15|HS_CLK|VCLK| 
-|A16|A17|Address 17|-|B16|!C_OE|!AS| 
-|A17|A01|Address 01|-|B17|!C_CE|!CE0| 
-|A18|GND|Ground|-|B18|!AS|Address strobe| 
-|A19|D07|Data 7|-|B19|CLK|68000 clock| 
-|A20|D00|Data 0|-|B20|!DTACK|Data ack| 
-|A21|D08|Data 8|-|B21|!CAS_2|!CAS_2| 
-|A22|D06|Data 6|-|B22|D15|Data 15| 
-|A23|D01|Data 1|-|B23|D14|Data 14| 
-|A24|D09|Data 9|-|B24|D13|Data 13| 
-|A25|D05|Data 5|-|B25|D12|Data 12| 
-|A26|D02|Data 2|-|B26|!LO_MEM|!ASEL| 
-|A27|D10|Data 10|-|B27|!RST |68K reset| 
-|A28|D04|Data 4|-|B28|!LDS|Lower data strobe| 
-|A29|D03|Data 3|-|B29|!UDSW|Upper data strobe| 
-|A30|D11|Data 11|-|B30|!SRST|!M3 - soft reset| 
-|A31|5v|VCC1|-|B31|!TIME|Unknown| 
-|A32|GND|Ground|-|B32|!C_DTCT|Cart detect - disables onboard ROM(s)| 
- 
- 
- 
-Notes:\\ 
-Address and Data busses are from the 68000 perspective.\\ 
-VCC1 supplies power to the 68000 and the YM2612 and possibly some other minor parts.\\ 
-VCC2 supplies power to the Z80, memory and custom chips. They are generated by two seperate voltage regulators. \\ 
-CLK and HS_CLK are not synchronous, just in case you want to do anything funky (like I did).\\ 
schematics/megadrivecart.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1