Support for Atmega8?

[kokospalme]

Hello,
I'm working on a small arduino synth-project which contains a diy pcb with an atmega8 and a 16Mhz crystal on it.
When I try to compile the my code, which works fine on an Arduino Uno gives me the following error:
(It's actually a fork on this library: https://github.com/ChrisMicro/the_synth)

Arduino:` 1.8.19 (Mac OS X), Board: "ATmega8, No bootloader, EEPROM retained, BOD 2.7V, LTO enabled, External 16 MHz"

In file included from /Users/xx/Documents/Arduino/P13_TinySynthKeys_Wavetable_ardu/P13_TinySynthKeys_Wavetable_ardu.ino:2:0:
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h: In function 'void __vector_6()':
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:72:2: error: 'OCR2A' was not declared in this scope
  OCR2A = OCR2B = Output;
  ^~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:72:2: note: suggested alternative: 'OCR2'
  OCR2A = OCR2B = Output;
  ^~~~~
  OCR2
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:72:10: error: 'OCR2B' was not declared in this scope
  OCR2A = OCR2B = Output;
          ^~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:72:10: note: suggested alternative: 'OCR2'
  OCR2A = OCR2B = Output;
          ^~~~~
          OCR2
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h: In member function 'void synth::begin()':
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:157:2: error: 'TCCR1C' was not declared in this scope
  TCCR1C = 0x00;
  ^~~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:157:2: note: suggested alternative: 'TCCR1A'
  TCCR1C = 0x00;
  ^~~~~~
  TCCR1A
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:159:6: error: 'TIMSK1' was not declared in this scope
  SET(TIMSK1, OCIE1A);                            //-Start audio interrupt
      ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:35:19: note: in definition of macro 'SET'
 #define SET(x,y) (x |=(1<<y))            //-Bit set/clear macros
                   ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:159:6: note: suggested alternative: 'TIMSK'
  SET(TIMSK1, OCIE1A);                            //-Start audio interrupt
      ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:35:19: note: in definition of macro 'SET'
 #define SET(x,y) (x |=(1<<y))            //-Bit set/clear macros
                   ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:162:2: error: 'TCCR2A' was not declared in this scope
  TCCR2A = 0x83;                                  //-8 bit audio PWM
  ^~~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:162:2: note: suggested alternative: 'TCCR1A'
  TCCR2A = 0x83;                                  //-8 bit audio PWM
  ^~~~~~
  TCCR1A
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:163:2: error: 'TCCR2B' was not declared in this scope
  TCCR2B = 0x01;                                  // |
  ^~~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:163:2: note: suggested alternative: 'TCCR1B'
  TCCR2B = 0x01;                                  // |
  ^~~~~~
  TCCR1B
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:164:2: error: 'OCR2A' was not declared in this scope
  OCR2A = 127;                                    //-+
  ^~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:164:2: note: suggested alternative: 'OCR2'
  OCR2A = 127;                                    //-+
  ^~~~~
  OCR2
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h: In member function 'void synth::begin(unsigned char)':
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:183:2: error: 'TCCR1C' was not declared in this scope
  TCCR1C = 0x00;
  ^~~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:183:2: note: suggested alternative: 'TCCR1A'
  TCCR1C = 0x00;
  ^~~~~~
  TCCR1A
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:185:6: error: 'TIMSK1' was not declared in this scope
  SET(TIMSK1, OCIE1A);                            //-Start audio interrupt
      ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:35:19: note: in definition of macro 'SET'
 #define SET(x,y) (x |=(1<<y))            //-Bit set/clear macros
                   ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:185:6: note: suggested alternative: 'TIMSK'
  SET(TIMSK1, OCIE1A);                            //-Start audio interrupt
      ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:35:19: note: in definition of macro 'SET'
 #define SET(x,y) (x |=(1<<y))            //-Bit set/clear macros
                   ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:193:3: error: 'TCCR2A' was not declared in this scope
   TCCR2A = 0xB3;                                  //-8 bit audio PWM
   ^~~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:193:3: note: suggested alternative: 'TCCR1A'
   TCCR2A = 0xB3;                                  //-8 bit audio PWM
   ^~~~~~
   TCCR1A
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:194:3: error: 'TCCR2B' was not declared in this scope
   TCCR2B = 0x01;                                  // |
   ^~~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:194:3: note: suggested alternative: 'TCCR1B'
   TCCR2B = 0x01;                                  // |
   ^~~~~~
   TCCR1B
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:195:3: error: 'OCR2A' was not declared in this scope
   OCR2A = OCR2B = 127;                            //-+
   ^~~~~
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:195:3: note: suggested alternative: 'OCR2'
   OCR2A = OCR2B = 127;                            //-+
   ^~~~~
   OCR2
/Users/Chris/Documents/Arduino/libraries/the_synth/src/synth.h:195:11: error: 'OCR2B' was not declared in this scope
   OCR2A = OCR2B = 127;                            //-+
           ^~~~~
/Users/Chris/Documents/Arduino/libraries/the_synth/src/synth.h:195:11: note: suggested alternative: 'OCR2'
   OCR2A = OCR2B = 127;                            //-+
           ^~~~~
           OCR2
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h: In member function 'void synth::suspend()':
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:394:10: error: 'TIMSK1' was not declared in this scope
      CLR(TIMSK1, OCIE1A);                            //-Stop audio interrupt
          ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:36:19: note: in definition of macro 'CLR'
 #define CLR(x,y) (x &= (~(1<<y)))          // |
                   ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:394:10: note: suggested alternative: 'TIMSK'
      CLR(TIMSK1, OCIE1A);                            //-Stop audio interrupt
          ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:36:19: note: in definition of macro 'CLR'
 #define CLR(x,y) (x &= (~(1<<y)))          // |
                   ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h: In member function 'void synth::resume()':
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:398:10: error: 'TIMSK1' was not declared in this scope
      SET(TIMSK1, OCIE1A);                            //-Start audio interrupt
          ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:35:19: note: in definition of macro 'SET'
 #define SET(x,y) (x |=(1<<y))            //-Bit set/clear macros
                   ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:398:10: note: suggested alternative: 'TIMSK'
      SET(TIMSK1, OCIE1A);                            //-Start audio interrupt
          ^
/Users/xx/Documents/Arduino/libraries/the_synth/src/synth.h:35:19: note: in definition of macro 'SET'
 #define SET(x,y) (x |=(1<<y))            //-Bit set/clear macros
                   ^
exit status 1
Fehler beim Kompilieren für das Board ATmega8.

I think the registers of the Atmega328 and Atmega8 are different... What do I have to know about the processor to get this library working on an Atmega8? The Library is really great it would be a charm if I could get it working on my project...

Thank you :)