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fixed YM2612 Timers bug: fixes "Langrisser Hikari II"/"Der Langrisser II" (Sega logo)

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ekeeke31 2010-02-21 18:33:58 +00:00
parent e793e3c8fd
commit 0c3e9c601c
1 changed files with 20 additions and 14 deletions
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34
source/sound/ym2612.c
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@ -788,14 +788,18 @@ INLINE void INTERNAL_TIMER_A()
if ((ym2612.OPN.ST.TAC -= ym2612.OPN.ST.TimerBase) <= 0)
{
/* set status (if enabled) */
if (ym2612.OPN.ST.mode & 0x04) ym2612.OPN.ST.status |= 0x01;
if (ym2612.OPN.ST.mode & 0x04)
ym2612.OPN.ST.status |= 0x01;
/* reload the counter */
if (ym2612.OPN.ST.TAL) ym2612.OPN.ST.TAC += ym2612.OPN.ST.TAL;
else ym2612.OPN.ST.TAC = ym2612.OPN.ST.TAL;
if (ym2612.OPN.ST.TAL)
ym2612.OPN.ST.TAC += ym2612.OPN.ST.TAL;
else
ym2612.OPN.ST.TAC = ym2612.OPN.ST.TAL;
/* CSM mode auto key on */
if ((ym2612.OPN.ST.mode & 0xC0) == 0x80) CSMKeyControll(&ym2612.CH[2]);
if ((ym2612.OPN.ST.mode & 0xC0) == 0x80)
CSMKeyControll(&ym2612.CH[2]);
}
}
}
@ -807,11 +811,14 @@ INLINE void INTERNAL_TIMER_B(int step)
if ((ym2612.OPN.ST.TBC -= (ym2612.OPN.ST.TimerBase * step)) <= 0)
{
/* set status (if enabled) */
if (ym2612.OPN.ST.mode & 0x08) ym2612.OPN.ST.status |= 0x02;
if (ym2612.OPN.ST.mode & 0x08)
ym2612.OPN.ST.status |= 0x02;
/* reload the counter */
if (ym2612.OPN.ST.TBL) ym2612.OPN.ST.TBC += ym2612.OPN.ST.TBL;
else ym2612.OPN.ST.TBC = ym2612.OPN.ST.TBL;
if (ym2612.OPN.ST.TBL)
ym2612.OPN.ST.TBC += ym2612.OPN.ST.TBL;
else
ym2612.OPN.ST.TBC = ym2612.OPN.ST.TBL;
}
}
}
@ -846,9 +853,11 @@ INLINE void set_timers(int v )
}
/* reload Timers */
if ((v&1) & !(ym2612.OPN.ST.mode&1)) ym2612.OPN.ST.TAC = ym2612.OPN.ST.TAL;
if ((v&2) & !(ym2612.OPN.ST.mode&2)) ym2612.OPN.ST.TBC = ym2612.OPN.ST.TBL;
if ((v&1) && !(ym2612.OPN.ST.mode&1))
ym2612.OPN.ST.TAC = ym2612.OPN.ST.TAL;
if ((v&2) && !(ym2612.OPN.ST.mode&2))
ym2612.OPN.ST.TBC = ym2612.OPN.ST.TBL;
/* reset Timers flags */
ym2612.OPN.ST.status &= (~v >> 4);
@ -2100,6 +2109,7 @@ void YM2612Update(short int *buffer, int length)
advance_eg_channel(&ym2612.CH[5].SLOT[SLOT1]);
}
/* 14-bit channel output */
if (out_fm[0] > 8191) out_fm[0] = 8191;
else if (out_fm[0] < -8192) out_fm[0] = -8192;
if (out_fm[1] > 8191) out_fm[1] = 8191;
@ -2127,10 +2137,6 @@ void YM2612Update(short int *buffer, int length)
lt += ((out_fm[5]) & ym2612.OPN.pan[10]);
rt += ((out_fm[5]) & ym2612.OPN.pan[11]);
/* limiter */
// Limit(lt,MAXOUT,MINOUT);
// Limit(rt,MAXOUT,MINOUT);
/* buffering */
*buffer++ = lt;
*buffer++ = rt;