OPL3_REG_KEYON_BLOCK
opl3_reg = OPL3_LEFT | (OPL3_REG_KEYON_BLOCK + voice_offset);
opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);