diff options
Diffstat (limited to 'ym2612.c')
| -rw-r--r-- | ym2612.c | 34 |
1 files changed, 12 insertions, 22 deletions
@@ -582,9 +582,20 @@ void ym_update_phase_inc(ym2612_context * context, ym_operator * operator, uint3 void ym_data_write(ym2612_context * context, uint8_t value) { - if (context->selected_reg < 0x21 || context->selected_reg > 0xB6 || (context->selected_reg < 0x30 && context->selected_part)) { + if (context->selected_reg >= YM_REG_END) { return; } + if (context->selected_part) { + if (context->selected_reg < YM_PART2_START) { + return; + } + context->part2_regs[context->selected_reg - YM_PART2_START] = value; + } else { + if (context->selected_reg < YM_PART1_START) { + return; + } + context->part1_regs[context->selected_reg - YM_PART1_START] = value; + } dfprintf(debug_file, "write of %X to reg %X in part %d\n", value, context->selected_reg, context->selected_part+1); if (context->selected_reg < 0x30) { //Shared regs @@ -765,24 +776,3 @@ uint8_t ym_read_status(ym2612_context * context) return context->status; } -#define GST_YM_OFFSET 0x1E4 -#define GST_YM_SIZE (0x3E4-GST_YM_OFFSET) - -uint8_t ym_load_gst(ym2612_context * context, FILE * gstfile) -{ - uint8_t regdata[GST_YM_SIZE]; - fseek(gstfile, GST_YM_OFFSET, SEEK_SET); - if (fread(regdata, 1, sizeof(regdata), gstfile) != sizeof(regdata)) { - return 0; - } - for (int i = 0; i < sizeof(regdata); i++) { - if (i & 0x100) { - ym_address_write_part2(context, i & 0xFF); - } else { - ym_address_write_part1(context, i); - } - ym_data_write(context, regdata[i]); - } - return 1; -} - |