#pragma once #ifndef __OKIM6295_H__ #define __OKIM6295_H__ /* an interface for the OKIM6295 and similar chips */ /* Note about the playback frequency: the external clock is internally divided, depending on pin 7, by 132 (high) or 165 (low). */ typedef struct _okim6295_interface okim6295_interface; struct _okim6295_interface { int pin7; const char *rgnoverride; }; extern const okim6295_interface okim6295_interface_pin7high; extern const okim6295_interface okim6295_interface_pin7low; void okim6295_set_bank_base(int which, int base); void okim6295_set_pin7(int which, int pin7); READ8_HANDLER( okim6295_status_0_r ); READ8_HANDLER( okim6295_status_1_r ); READ8_HANDLER( okim6295_status_2_r ); READ16_HANDLER( okim6295_status_0_lsb_r ); READ16_HANDLER( okim6295_status_1_lsb_r ); READ16_HANDLER( okim6295_status_2_lsb_r ); READ16_HANDLER( okim6295_status_0_msb_r ); READ16_HANDLER( okim6295_status_1_msb_r ); READ16_HANDLER( okim6295_status_2_msb_r ); WRITE8_HANDLER( okim6295_data_0_w ); WRITE8_HANDLER( okim6295_data_1_w ); WRITE8_HANDLER( okim6295_data_2_w ); WRITE16_HANDLER( okim6295_data_0_lsb_w ); WRITE16_HANDLER( okim6295_data_1_lsb_w ); WRITE16_HANDLER( okim6295_data_2_lsb_w ); WRITE16_HANDLER( okim6295_data_0_msb_w ); WRITE16_HANDLER( okim6295_data_1_msb_w ); WRITE16_HANDLER( okim6295_data_2_msb_w ); /* To help the various custom ADPCM generators out there, the following routines may be used. */ struct adpcm_state { INT32 signal; INT32 step; }; void reset_adpcm(struct adpcm_state *state); INT16 clock_adpcm(struct adpcm_state *state, UINT8 nibble); #endif /* __OKIM6295_H__ */