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schematics:megadrivecart

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schematics:megadrivecart [2005/11/09 06:44] – created 195.149.50.76schematics:megadrivecart [2005/11/09 11:40] aidanii
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 |A28|D04|Data 4|-|B28|!LDS|Lower data strobe| |A28|D04|Data 4|-|B28|!LDS|Lower data strobe|
 |A29|D03|Data 3|-|B29|!UDSW|Upper data strobe| |A29|D03|Data 3|-|B29|!UDSW|Upper data strobe|
-|A30|D11|Data 11|-|B30|!SRST|!M3|+|A30|D11|Data 11|-|B30|!SRST|!M3 - soft reset|
 |A31|5v|VCC1|-|B31|!TIME|Unknown| |A31|5v|VCC1|-|B31|!TIME|Unknown|
-|A32|GND|Ground|-|B32|!C_DTCT|!CART|+|A32|GND|Ground|-|B32|!C_DTCT|Cart detect - disables onboard ROM(s)|
  
  
Line 42: Line 42:
 Address and Data busses are from the 68000 perspective.\\ Address and Data busses are from the 68000 perspective.\\
 VCC1 supplies power to the 68000 and the YM2612 and possibly some other minor parts.\\ 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.\\ +VCC2 supplies power to the Z80, memory and custom chips. They are generated by two seperate voltage regulators. \\ 
-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).\\
-CLK and HS_CLK are not synchronous, just in case you want to do anything funky.\\+
schematics/megadrivecart.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1