ATARI_SWITCH_SND6
atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift;
if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) {
((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) |
#define ATARI_SWITCH_OVSC_SND6 (ATARI_SWITCH_SND6 << ATARI_SWITCH_OVSC_SHIFT)