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diagram.txt
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+------------------------------------------------------------------+
|Famidi (Midi cart) |
| |
| | |
| | midiin |
| v |
| +------------+ 8bit +---------+ +--------+ |
| | | data bus | | | | |
| | atmega328p |--------->| 74HC541 |-----+-----| 27C256 | |
| | | | | | | | |
| +------------+ +---------+ | +--------+ |
| | ^ ^ | ^ |
| | +-----------------+ | | |
+-------|--------|----------------------------|---------|----------+
| NMI |15bit | 8bit | 14bit
| |Address | data | Address
v | v bus | bus
+------------------------------------------------------------------+
|Family Computer (NES) |
+------------------------------------------------------------------+