schematics:megadrivecart
Differences
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schematics:megadrivecart [2005/11/09 06:44] – created 195.149.50.76 | schematics:megadrivecart [2019/08/27 20:45] (current) – external edit 127.0.0.1 | ||
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^pin^Name^Description^-^pin^Name^Description^ | ^pin^Name^Description^-^pin^Name^Description^ | ||
|A01|GND|Ground|-|B01|SL1|Sound input left| | |A01|GND|Ground|-|B01|SL1|Sound input left| | ||
- | |A02|5v|VCC1|-|B02|!HRST|Reset| | + | |A02|5v|VCC1|-|B02|!HRST|Hard reset| |
|A03|A08|Address 08|-|B03|SR1|Sound input right| | |A03|A08|Address 08|-|B03|SR1|Sound input right| | ||
|A04|A11|Address 11|-|B04|A09|Address 09| | |A04|A11|Address 11|-|B04|A09|Address 09| | ||
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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|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)| |
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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, |
- | CLK and HS_CLK are not synchronous, | + |
schematics/megadrivecart.1131482649.txt.gz · Last modified: 2019/08/27 20:44 (external edit)