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This commit is contained in:
retro-wertz
2017-10-15 02:07:42 +08:00
parent e428160996
commit ebca2248d0
75 changed files with 641 additions and 582 deletions
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20
src/boards/178.c
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@@ -29,7 +29,7 @@ static uint8 reg[4];
static uint8 *WRAM = NULL;
static uint32 WRAMSIZE;
// SND Registers
/* SND Registers */
static uint8 pcm_enable = 0;
static int16 pcm_latch = 0x3F6, pcm_clock = 0x3F6;
static writefunc pcmwrite;
@@ -46,13 +46,13 @@ static int16 step_size[49] = {
107, 118, 130, 143, 157, 173, 190, 209, 230, 253,
279, 307, 337, 371, 408, 449, 494, 544, 598, 658,
724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552
}; //49 items
}; /* 49 items */
static int32 step_adj[16] = { -1, -1, -1, -1, 2, 5, 7, 9, -1, -1, -1, -1, 2, 5, 7, 9 };
//decode stuff
/* decode stuff */
static int32 jedi_table[16 * 49];
static int32 acc = 0; //ADPCM accumulator, initial condition must be 0
static int32 decstep = 0; //ADPCM decoding step, initial condition must be 0
static int32 acc = 0; /* ADPCM accumulator, initial condition must be 0 */
static int32 decstep = 0; /* ADPCM decoding step, initial condition must be 0 */
static void jedi_table_init() {
int step, nib;
@@ -67,7 +67,7 @@ static void jedi_table_init() {
static uint8 decode(uint8 code) {
acc += jedi_table[decstep + code];
if ((acc & ~0x7ff) != 0) // acc is > 2047
if ((acc & ~0x7ff) != 0) /* acc is > 2047 */
acc |= ~0xfff;
else acc &= 0xfff;
decstep += step_adj[code & 7] * 16;
@@ -81,13 +81,13 @@ static void Sync(void) {
uint32 bbank = reg[2];
setchr8(0);
setprg8r(0x10, 0x6000, reg[3] & 3);
if (reg[0] & 2) { // UNROM mode
if (reg[0] & 2) { /* UNROM mode */
setprg16(0x8000, (bbank << 3) | sbank);
if (reg[0] & 4)
setprg16(0xC000, (bbank << 3) | 6 | (reg[1] & 1));
else
setprg16(0xC000, (bbank << 3) | 7);
} else { // NROM mode
} else { /* NROM mode */
uint32 bank = (bbank << 3) | sbank;
if (reg[0] & 4) {
setprg16(0x8000, bank);
@@ -100,7 +100,7 @@ static void Sync(void) {
static DECLFW(M178Write) {
reg[A & 3] = V;
// FCEU_printf("cmd %04x:%02x\n", A, V);
/* FCEU_printf("cmd %04x:%02x\n", A, V); */
Sync();
}
@@ -108,7 +108,7 @@ static DECLFW(M178WriteSnd) {
if (A == 0x5800) {
if (V & 0xF0) {
pcm_enable = 1;
// pcmwrite(0x4011, (V & 0xF) << 3);
/* pcmwrite(0x4011, (V & 0xF) << 3); */
pcmwrite(0x4011, decode(V & 0xf));
} else
pcm_enable = 0;