snesapu_arduino.diff

--- SNES_APU_SD.orig/SNES_APU_SD/APU.cpp	2017-04-09 21:46:31.648099700 +0900
+++ SNES_APU_SD/SNES_APU_SD/APU.cpp	2017-04-09 21:46:31.648099700 +0900
@@ -16,10 +16,10 @@
 void APU::init(uint8_t type)
 {
 #if not (defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__))
-  PORTB = 0x0F;
-  DDRB = 0x0F;
-  DDRC &= 0xC0;
-  PORTC &= 0xC0;
+  PORTB = 0x2C;
+  DDRB = 0x2C;
+  DDRC &= 0x01;
+  PORTC &= 0x01;
    
 #else
   mega_type = type;
@@ -126,16 +126,16 @@
 {
   unsigned char data;
 
-  DDRB = 0x0F;
+  DDRB = 0x3C;
   DDRD &= ~0xFC;
-  PORTB &= ~0x03;
-  PORTB |= (address & 0x03);
+  PORTB &= ~0x0C;
+  PORTB |= (address & 0x03) << 2;
 
-  PORTB &= ~0x04;
+  PORTB &= ~0x20;
   __asm__ __volatile__ ("nop");
   __asm__ __volatile__ ("nop");
-  data=((PINB&0x30)>>4) | (PIND&0xFC);
-  PORTB |= 0x04;
+  data=((PINB&0x03) << 6) | ((PIND&0xFC) >> 2);
+  PORTB |= 0x20;
   return data;
 }
 
@@ -147,15 +147,15 @@
   DDRD |= 0xFC;
 
   PORTD &= ~0xFC;
-  PORTD |= (data & 0xFC);
+  PORTD |= ((data << 2) & 0xFC);
 
-  PORTB &= ~0x33;
-  PORTB |= (address & 0x03);
-  PORTB |= ((data & 0x03)<<4);
-  PORTB &= ~0x08;
+  PORTB &= ~0x0F;
+  PORTB |= (address & 0x03) << 2;
+  PORTB |= ((data >> 6) & 0x03);
+  PORTB &= ~0x10;
   __asm__ __volatile__ ("nop");
   __asm__ __volatile__ ("nop");
-  PORTB |= 0x08;
+  PORTB |= 0x10;
 }
 
 void APU::reset_arduino()