Mercurial > repos > blastem
diff ym2612.h @ 1904:8312e574100a
Implement selectable YM2612/YM3834 invalid status port behavior
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Wed, 26 Feb 2020 22:40:37 -0800 |
| parents | 32a3aa7b4a45 |
| children | 508522f08e4d |
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--- a/ym2612.h Tue Feb 25 20:03:04 2020 -0800 +++ b/ym2612.h Wed Feb 26 22:40:37 2020 -0800 @@ -16,6 +16,7 @@ #define NUM_OPERATORS (4*NUM_CHANNELS) #define YM_OPT_WAVE_LOG 1 +#define YM_OPT_3834 2 typedef struct { int16_t *mod_src[2]; @@ -72,6 +73,9 @@ uint32_t write_cycle; uint32_t busy_start; uint32_t busy_cycles; + uint32_t last_status_cycle; + uint32_t invalid_status_decay; + uint32_t status_address_mask; int32_t volume_mult; int32_t volume_div; ym_operator operators[NUM_OPERATORS]; @@ -97,6 +101,7 @@ uint8_t lfo_pm_step; uint8_t csm_keyon; uint8_t status; + uint8_t last_status; uint8_t selected_reg; uint8_t selected_part; uint8_t part1_regs[YM_PART1_REGS]; @@ -139,7 +144,7 @@ void ym_address_write_part1(ym2612_context * context, uint8_t address); void ym_address_write_part2(ym2612_context * context, uint8_t address); void ym_data_write(ym2612_context * context, uint8_t value); -uint8_t ym_read_status(ym2612_context * context, uint32_t cycle); +uint8_t ym_read_status(ym2612_context * context, uint32_t cycle, uint32_t port); uint8_t ym_load_gst(ym2612_context * context, FILE * gstfile); uint8_t ym_save_gst(ym2612_context * context, FILE * gstfile); void ym_print_channel_info(ym2612_context *context, int channel);