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This commit is contained in:
retro-wertz
2017-10-15 03:13:11 +08:00
parent ebca2248d0
commit 52c8155dee
33 changed files with 441 additions and 408 deletions
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54
src/fds.c
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@@ -34,10 +34,11 @@
#include "cart.h"
#include "md5.h"
// TODO: Add code to put a delay in between the time a disk is inserted
// and the when it can be successfully read/written to. This should
// prevent writes to wrong places OR add code to prevent disk ejects
// when the virtual motor is on(mmm...virtual motor).
/* TODO: Add code to put a delay in between the time a disk is inserted
* and the when it can be successfully read/written to. This should
* prevent writes to wrong places OR add code to prevent disk ejects
* when the virtual motor is on(mmm...virtual motor).
*/
static DECLFR(FDSRead4030);
static DECLFR(FDSRead4031);
@@ -115,9 +116,9 @@ static void FDSInit(void) {
lastDiskPtrRead = lastDiskPtrWrite = writeskip = DiskPtr = DiskSeekIRQ = 0;
setmirror(1);
setprg8(0xE000, 0); // BIOS
setprg32r(1, 0x6000, 0); // 32KB RAM
setchr8(0); // 8KB CHR RAM
setprg8(0xE000, 0); /* BIOS */
setprg32r(1, 0x6000, 0); /* 32KB RAM */
setchr8(0); /* 8KB CHR RAM */
MapIRQHook = FDSFix;
GameStateRestore = FDSStateRestore;
@@ -230,7 +231,7 @@ static DECLFR(FDSRead4032) {
}
static DECLFR(FDSRead4033) {
return 0x80; // battery
return 0x80; /* battery */
}
/* Begin FDS sound */
@@ -238,21 +239,21 @@ static DECLFR(FDSRead4033) {
#define FDSClock (1789772.7272727272727272 / 2)
typedef struct {
int64 cycles; // Cycles per PCM sample
int64 count; // Cycle counter
int64 envcount; // Envelope cycle counter
int64 cycles; /* Cycles per PCM sample */
int64 count; /* Cycle counter */
int64 envcount; /* Envelope cycle counter */
uint32 b19shiftreg60;
uint32 b24adder66;
uint32 b24latch68;
uint32 b17latch76;
int32 clockcount; // Counter to divide frequency by 8.
uint8 b8shiftreg88; // Modulation register.
uint8 amplitude[2]; // Current amplitudes.
int32 clockcount; /* Counter to divide frequency by 8. */
uint8 b8shiftreg88; /* Modulation register. */
uint8 amplitude[2]; /* Current amplitudes. */
uint8 speedo[2];
uint8 mwcount;
uint8 mwstart;
uint8 mwave[0x20]; // Modulation waveform
uint8 cwave[0x40]; // Game-defined waveform(carrier)
uint8 mwave[0x20]; /* Modulation waveform */
uint8 cwave[0x40]; /* Game-defined waveform(carrier) */
uint8 SPSG[0xB];
} FDSSOUND;
@@ -318,13 +319,14 @@ static DECLFW(FDSSWrite) {
SPSG[A] = V;
}
// $4080 - Fundamental wave amplitude data register 92
// $4082 - Fundamental wave frequency data register 58
// $4083 - Same as $4082($4083 is the upper 4 bits).
// $4084 - Modulation amplitude data register 78
// $4086 - Modulation frequency data register 72
// $4087 - Same as $4086($4087 is the upper 4 bits)
/* $4080 - Fundamental wave amplitude data register 92
* $4082 - Fundamental wave frequency data register 58
* $4083 - Same as $4082($4083 is the upper 4 bits).
*
* $4084 - Modulation amplitude data register 78
* $4086 - Modulation frequency data register 72
* $4087 - Same as $4086($4087 is the upper 4 bits)
*/
static void DoEnv() {
@@ -413,7 +415,7 @@ static INLINE int32 FDSDoSound(void) {
}
if (fdso.count >= 32768) goto dogk;
// Might need to emulate applying the amplitude to the waveform a bit better...
/* Might need to emulate applying the amplitude to the waveform a bit better... */
{
int k = amplitude[0];
if (k > 0x20) k = 0x20;
@@ -438,7 +440,7 @@ static void RenderSound(void) {
uint32 t = FDSDoSound();
t += t >> 1;
t >>= 4;
Wave[x >> 4] += t; //(t>>2)-(t>>3); //>>3;
Wave[x >> 4] += t; /* (t>>2)-(t>>3); */ /* >>3; */
}
}
@@ -449,7 +451,7 @@ static void RenderSoundHQ(void) {
for (x = FBC; x < SOUNDTS; x++) {
uint32 t = FDSDoSound();
t += t >> 1;
WaveHi[x] += t; //(t<<2)-(t<<1);
WaveHi[x] += t; /* (t<<2)-(t<<1); */
}
FBC = SOUNDTS;
}