static WRITE8_HANDLER( namco_54xx_O_w ) { namco_54xx_state *state = get_safe_token(space->cpu->owner()); UINT8 out = (data & 0x0f); if (data & 0x10) discrete_sound_w(state->discrete, NAMCO_54XX_1_DATA(state->basenode), out); else discrete_sound_w(state->discrete, NAMCO_54XX_0_DATA(state->basenode), out); }
************************************************/ DISCRETE_DAC_R1(NODE_30, NAMCO_54XX_1_DATA(NODE_01), 4, /* 4V - unmeasured*/ &bosco_54xx_dac) DISCRETE_OP_AMP_FILTER(BOSCO_CHANL2_SND, 1, /* ENAB */ NODE_30, /* INP0 */ 0, /* INP1 - not used */ DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &bosco_chanl2_filt) /************************************************ * CHANL3 sound ************************************************/ DISCRETE_DAC_R1(NODE_40, NAMCO_54XX_0_DATA(NODE_01), 4, /* 4V - unmeasured*/ &bosco_54xx_dac) DISCRETE_OP_AMP_FILTER(BOSCO_CHANL3_SND, 1, /* ENAB */ NODE_40, /* INP0 */ 0, /* INP1 - not used */ DISC_OP_AMP_FILTER_IS_BAND_PASS_1M, &bosco_chanl3_filt) /************************************************ * CHANL4 sound ************************************************/ /* this circuit was simulated in SPICE and an equivalent filter circuit generated */ DISCRETE_DAC_R1(NODE_50, NAMCO_52XX_P_DATA(NODE_04), 4, /* 4V - unmeasured*/