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GBHawk: implement some minor audio hardware bugs

This commit is contained in:
alyosha-tas 2020-05-23 14:35:55 -04:00
parent f2f2de8bdd
commit 2e4609ff02
1 changed files with 9 additions and 3 deletions
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12
src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/Audio.cs
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@ -240,6 +240,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
{ {
SQ1_enable = true; SQ1_enable = true;
SQ1_vol_done = false; SQ1_vol_done = false;
SQ1_duty_cntr = 0;
if (SQ1_len_cntr == 0) if (SQ1_len_cntr == 0)
{ {
SQ1_len_cntr = 64; SQ1_len_cntr = 64;
@ -247,8 +249,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
} }
SQ1_vol_state = SQ1_st_vol; SQ1_vol_state = SQ1_st_vol;
SQ1_vol_per = (SQ1_per > 0) ? SQ1_per : 8; SQ1_vol_per = (SQ1_per > 0) ? SQ1_per : 8;
if (sequencer_vol == 4) { SQ1_vol_per++; }
SQ1_frq_shadow = SQ1_frq; SQ1_frq_shadow = SQ1_frq;
SQ1_intl_cntr = (2048 - SQ1_frq_shadow) * 4; SQ1_intl_cntr = ((2048 - SQ1_frq_shadow) * 4) | (SQ1_intl_cntr & 3);
SQ1_intl_swp_cnt = SQ1_swp_prd > 0 ? SQ1_swp_prd : 8; SQ1_intl_swp_cnt = SQ1_swp_prd > 0 ? SQ1_swp_prd : 8;
SQ1_calc_done = false; SQ1_calc_done = false;
@ -332,15 +335,17 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
{ {
SQ2_enable = true; SQ2_enable = true;
SQ2_vol_done = false; SQ2_vol_done = false;
SQ2_duty_cntr = 0;
if (SQ2_len_cntr == 0) if (SQ2_len_cntr == 0)
{ {
SQ2_len_cntr = 64; SQ2_len_cntr = 64;
if (((value & 0x40) > 0) && ((sequencer_len & 1) == 0)) { SQ2_len_cntr--; } if (((value & 0x40) > 0) && ((sequencer_len & 1) == 0)) { SQ2_len_cntr--; }
} }
SQ2_intl_cntr = (2048 - SQ2_frq) * 4; SQ2_intl_cntr = ((2048 - SQ2_frq) * 4) | (SQ2_intl_cntr & 3);
SQ2_vol_state = SQ2_st_vol; SQ2_vol_state = SQ2_st_vol;
SQ2_vol_per = (SQ2_per > 0) ? SQ2_per : 8; SQ2_vol_per = (SQ2_per > 0) ? SQ2_per : 8;
if (sequencer_vol == 4) { SQ2_vol_per++; }
if ((SQ2_vol_state == 0) && !SQ2_env_add) { SQ2_enable = false; } if ((SQ2_vol_state == 0) && !SQ2_env_add) { SQ2_enable = false; }
} }
calculate_bias_gain_2(); calculate_bias_gain_2();
@ -472,6 +477,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
NOISE_intl_cntr = (DIVISOR[NOISE_div_code] << NOISE_clk_shft); NOISE_intl_cntr = (DIVISOR[NOISE_div_code] << NOISE_clk_shft);
NOISE_vol_state = NOISE_st_vol; NOISE_vol_state = NOISE_st_vol;
NOISE_vol_per = (NOISE_per > 0) ? NOISE_per : 8; NOISE_vol_per = (NOISE_per > 0) ? NOISE_per : 8;
if (sequencer_vol == 4) { NOISE_vol_per++; }
NOISE_LFSR = 0x7FFF; NOISE_LFSR = 0x7FFF;
if ((NOISE_vol_state == 0) && !NOISE_env_add) { NOISE_enable = false; } if ((NOISE_vol_state == 0) && !NOISE_env_add) { NOISE_enable = false; }
} }
@ -822,7 +828,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
} }
// clock the volume envelope // clock the volume envelope
if (sequencer_vol == 1) if (sequencer_vol == 5)
{ {
if (SQ1_per > 0) if (SQ1_per > 0)
{ {