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Offloaded some NES routines to eznes.h

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Luxferre
2026-01-11 14:47:32 +02:00
parent eb3feaf34c
commit e8156e49e5
2 changed files with 25 additions and 26 deletions
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nes/eznes.h
+14 -14
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@@ -52,7 +52,7 @@ void ppu_on() {
PPU.mask |= 0x1A;
}
int joy_input_wait() {
u8 joy_input_wait() {
u8 last_joy = 0, joy, pressed;
/* wait until the previous key is released */
while(joy_read(JOY_1));
@@ -88,7 +88,7 @@ void init_palette(u8 bg, u8 c1, u8 c2, u8 c3, u8 c4) {
/* 4x4 char block colorization method (palette is 0 to 3) */
void colorxy(u8 x, u8 y, u8 palette) {
unsigned int addr;
u16 addr;
u8 attr_byte;
addr = 0x23C0 + ((y >> 2) << 3) + (x >> 2);
attr_byte = palette | (palette << 2) | (palette << 4) | (palette << 6);
@@ -100,25 +100,25 @@ void colorxy(u8 x, u8 y, u8 palette) {
/* Sound section */
unsigned int get_timer_by_freq(int freq) {
return (unsigned int) ((CPU / 16 / freq) - 1);
u16 get_timer_by_freq(u16 freq) {
return (u16) ((CPU / 16 / freq) - 1);
}
void play_pulse(u8 idx, unsigned int freq, u8 len) {
unsigned int tm = get_timer_by_freq(freq);
void play_pulse(u8 idx, u16 freq, u8 len) {
u16 tm = get_timer_by_freq(freq);
if(len > 31) len = 31;
if(idx > 1) idx = 0;
APU.pulse[idx].period_low = tm & 255;
APU.pulse[idx].len_period_high = (tm >> 8) | (len << 3);
}
void play_jingle(unsigned int n1f1,
unsigned int n1f2,
unsigned int n2f1,
unsigned int n2f2,
unsigned int n3f1,
unsigned int n3f2) {
unsigned int i, dl = 2000;
void play_jingle(u16 n1f1,
u16 n1f2,
u16 n2f1,
u16 n2f2,
u16 n3f1,
u16 n3f2) {
u16 i, dl = 2000;
play_pulse(0, n1f1, 2);
play_pulse(1, n1f2, 2);
for(i=0;i<dl;++i);
@@ -165,7 +165,7 @@ void wait_for_start() {
/* randomize until Start is pressed */
void wait_for_start_rand() {
u8 joy;
unsigned int entropy = rand();
u16 entropy = rand();
while(1) {
++entropy;
joy = joy_read(JOY_1);