RaySollium99/picodrive
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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@295 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-11-15 23:01:20 +00:00
parent 8022f53da6
commit b542be4686
37 changed files with 928 additions and 548 deletions
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94
platform/gp2x/940ctl.c
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@ -51,22 +51,12 @@ static FILE *loaded_mp3 = 0;
}
/* these will be managed locally on our side */
extern int *ym2612_dacen;
extern INT32 *ym2612_dacout;
static UINT8 *REGS = 0; /* we will also keep local copy of regs for savestates and such */
static INT32 *addr_A1; /* address line A1 */
static int dacen;
static INT32 dacout;
static UINT8 ST_address; /* address register */
static UINT8 ST_status; /* status flag */
static UINT8 ST_mode; /* mode CSM / 3SLOT */
static int ST_TA; /* timer a */
static int ST_TAC; /* timer a maxval */
static int ST_TAT; /* timer a ticker */
static UINT8 ST_TB; /* timer b */
static int ST_TBC; /* timer b maxval */
static int ST_TBT; /* timer b ticker */
static int writebuff_ptr = 0;
@ -84,16 +74,16 @@ static int set_timers( int v )
/* b2 = timer enable a */
/* b1 = load b */
/* b0 = load a */
change = (ST_mode ^ v) & 0xc0;
ST_mode = v;
change = (ym2612_st->mode ^ v) & 0xc0;
ym2612_st->mode = v;
/* reset Timer b flag */
if( v & 0x20 )
ST_status &= ~2;
ym2612_st->status &= ~2;
/* reset Timer a flag */
if( v & 0x10 )
ST_status &= ~1;
ym2612_st->status &= ~1;
return change;
}
@ -139,30 +129,30 @@ int YM2612Write_940(unsigned int a, unsigned int v)
switch( addr )
{
case 0x24: { // timer A High 8
int TAnew = (ST_TA & 0x03)|(((int)v)<<2);
if(ST_TA != TAnew) {
int TAnew = (ym2612_st->TA & 0x03)|(((int)v)<<2);
if (ym2612_st->TA != TAnew) {
// we should reset ticker only if new value is written. Outrun requires this.
ST_TA = TAnew;
ST_TAC = (1024-TAnew)*18;
ST_TAT = 0;
ym2612_st->TA = TAnew;
ym2612_st->TAC = (1024-TAnew)*18;
ym2612_st->TAT = 0;
}
return 0;
}
case 0x25: { // timer A Low 2
int TAnew = (ST_TA & 0x3fc)|(v&3);
if(ST_TA != TAnew) {
ST_TA = TAnew;
ST_TAC = (1024-TAnew)*18;
ST_TAT = 0;
int TAnew = (ym2612_st->TA & 0x3fc)|(v&3);
if (ym2612_st->TA != TAnew) {
ym2612_st->TA = TAnew;
ym2612_st->TAC = (1024-TAnew)*18;
ym2612_st->TAT = 0;
}
return 0;
}
case 0x26: // timer B
if(ST_TB != v) {
ST_TB = v;
ST_TBC = (256-v)<<4;
ST_TBC *= 18;
ST_TBT = 0;
if (ym2612_st->TB != v) {
ym2612_st->TB = v;
ym2612_st->TBC = (256-v)<<4;
ym2612_st->TBC *= 18;
ym2612_st->TBT = 0;
}
return 0;
case 0x27: /* mode, timer control */
@ -229,38 +219,6 @@ int YM2612Write_940(unsigned int a, unsigned int v)
return 0; // cause the engine to do updates once per frame only
}
UINT8 YM2612Read_940(void)
{
return ST_status;
}
int YM2612PicoTick_940(int n)
{
//int ret = 0;
// timer A
if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {
ST_TAT -= ST_TAC;
if(ST_mode & 0x04) ST_status |= 1;
// CSM mode total level latch and auto key on
/* FIXME
if(ST_mode & 0x80) {
CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.
ret = 1;
}
*/
}
// timer B
if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {
ST_TBT -= ST_TBC;
if(ST_mode & 0x08) ST_status |= 2;
}
return 0;
}
#define CHECK_BUSY(job) \
(gp2x_memregs[0x3b46>>1] & (1<<(job-1)))
@ -339,12 +297,14 @@ void YM2612PicoStateLoad_940(void)
static void internal_reset(void)
{
writebuff_ptr = 0;
ST_mode = 0;
ST_status = 0; /* normal mode */
ST_TA = 0;
ST_TAC = 0;
ST_TB = 0;
ST_TBC = 0;
ym2612_st->mode = 0;
ym2612_st->status = 0; /* normal mode */
ym2612_st->TA = 0;
ym2612_st->TAC = 0;
ym2612_st->TAT = 0;
ym2612_st->TB = 0;
ym2612_st->TBC = 0;
ym2612_st->TBT = 0;
dacen = 0;
dacout = 0;
ST_address= 0;