static void K054539_keyon(int chip, int channel) { if(K054539_regupdate(chip)) K054539_chips.chip[chip].regs[0x22c] |= 1 << channel; }
static void K054539_keyoff(int chip, int channel) { if(K054539_regupdate(chip)) K054539_chips.chip[chip].regs[0x22c] &= ~(1 << channel); }
static void K054539_keyoff(struct k054539_info *info, int channel) { if(K054539_regupdate(info)) info->regs[0x22c] &= ~(1 << channel); }