#pragma once #ifndef __YMDELTAT_H__ #define __YMDELTAT_H__ #define YM_DELTAT_SHIFT (16) #define YM_DELTAT_EMULATION_MODE_NORMAL 0 #define YM_DELTAT_EMULATION_MODE_YM2610 1 typedef void (*STATUS_CHANGE_HANDLER)(void *chip, UINT8 status_bits); /* DELTA-T (adpcm type B) struct */ struct YM_DELTAT { /* AT: rearranged and tigntened structure */ UINT8 *memory; INT32 *output_pointer;/* pointer of output pointers */ INT32 *pan; /* pan : &output_pointer[pan] */ double freqbase; #if 0 double write_time; /* Y8950: 10 cycles of main clock; YM2608: 20 cycles of main clock */ double read_time; /* Y8950: 8 cycles of main clock; YM2608: 18 cycles of main clock */ #endif UINT32 memory_size; int output_range; UINT32 now_addr; /* current address */ UINT32 now_step; /* currect step */ UINT32 step; /* step */ UINT32 start; /* start address */ UINT32 limit; /* limit address */ UINT32 end; /* end address */ UINT32 delta; /* delta scale */ INT32 volume; /* current volume */ INT32 acc; /* shift Measurement value*/ INT32 adpcmd; /* next Forecast */ INT32 adpcml; /* current value */ INT32 prev_acc; /* leveling value */ UINT8 now_data; /* current rom data */ UINT8 CPU_data; /* current data from reg 08 */ UINT8 portstate; /* port status */ UINT8 control2; /* control reg: SAMPLE, DA/AD, RAM TYPE (x8bit / x1bit), ROM/RAM */ UINT8 portshift; /* address bits shift-left: ** 8 for YM2610, ** 5 for Y8950 and YM2608 */ UINT8 DRAMportshift; /* address bits shift-right: ** 0 for ROM and x8bit DRAMs, ** 3 for x1 DRAMs */ UINT8 memread; /* needed for reading/writing external memory */ /* handlers and parameters for the status flags support */ STATUS_CHANGE_HANDLER status_set_handler; STATUS_CHANGE_HANDLER status_reset_handler; /* note that different chips have these flags on different ** bits of the status register */ void * status_change_which_chip; /* this chip id */ UINT8 status_change_EOS_bit; /* 1 on End Of Sample (record/playback/cycle time of AD/DA converting has passed)*/ UINT8 status_change_BRDY_bit; /* 1 after recording 2 datas (2x4bits) or after reading/writing 1 data */ UINT8 status_change_ZERO_bit; /* 1 if silence lasts for more than 290 miliseconds on ADPCM recording */ /* neither Y8950 nor YM2608 can generate IRQ when PCMBSY bit changes, so instead of above, ** the statusflag gets ORed with PCM_BSY (below) (on each read of statusflag of Y8950 and YM2608) */ UINT8 PCM_BSY; /* 1 when ADPCM is playing; Y8950/YM2608 only */ UINT8 reg[16]; /* adpcm registers */ UINT8 emulation_mode; /* which chip we're emulating */ }; /*void YM_DELTAT_BRDY_callback(YM_DELTAT *DELTAT);*/ UINT8 YM_DELTAT_ADPCM_Read(YM_DELTAT *DELTAT); void YM_DELTAT_ADPCM_Write(YM_DELTAT *DELTAT,int r,int v); void YM_DELTAT_ADPCM_Reset(YM_DELTAT *DELTAT,int pan,int emulation_mode); void YM_DELTAT_ADPCM_CALC(YM_DELTAT *DELTAT); void YM_DELTAT_postload(YM_DELTAT *DELTAT,UINT8 *regs); void YM_DELTAT_savestate(device_t *device,YM_DELTAT *DELTAT); #endif /* __YMDELTAT_H__ */