1. request z80 bus 2. clear z80 reset 3. copy inital z80 "ram clear program" to the z80 ram area 4. start z80 reset 4. return z80 bus 5. clear z80 reset 6. do some stuff 7. start z80 reset 8. request z80 bus 9. clear z80 reset 10. copy sound program to the z80 ram area 11. start z80 request 12. return z80 bus 13. clear z80 reset