static inline int update_scanline(void) {
memory.vid.irq2taken = 0;
if (memory.vid.irq2control & 0x10) {
if (memory.vid.current_line == memory.vid.irq2start) {
if (memory.vid.irq2control & 0x80)
memory.vid.irq2start += (memory.vid.irq2pos + 3) / 0x180;
memory.vid.irq2taken = 1;
}
}
if (memory.vid.irq2taken) {
if (!skip_this_frame) {
if (last_line < 21)
last_line = 21;
if (memory.vid.current_line < 20)
memory.vid.current_line = 20;
draw_screen_scanline(last_line - 21, memory.vid.current_line - 20, 0);
}
last_line = memory.vid.current_line;
}
memory.vid.current_line++;
return memory.vid.irq2taken;
}
static inline void update_screen(void) {
if (memory.vid.irq2control & 0x40)
memory.vid.irq2start = (memory.vid.irq2pos + 3) / 0x180; /* ridhero gives 0x17d */
else
memory.vid.irq2start = 1000;
if (!skip_this_frame) {
if (last_line < 21) { /* there was no IRQ2 while the beam was in the
* visible area -> no need for scanline rendering */
draw_screen();
} else {
draw_screen_scanline(last_line - 21, 262, 1);
}
}
last_line = 0;
pd4990a_addretrace();
if (fc >= neogeo_frame_counter_speed) {
fc = 0;
neogeo_frame_counter++;
}
fc++;
//skip_this_frame = skip_next_frame;
//skip_next_frame = frame_skip(0);
}
static inline int neo_interrupt(void)
{
/*
static int fc;
int skip_this_frame;
*/
pd4990a_addretrace();
// printf("neogeo_frame_counter_speed %d\n",neogeo_frame_counter_speed);
if (!(irq2control & 0x8)) {
if (fc >= neogeo_frame_counter_speed) {
fc = 0;
neogeo_frame_counter++;
}
fc++;
}
skip_this_frame = skip_next_frame;
skip_next_frame = frame_skip(0);
if (!skip_this_frame) {
PROFILER_START(PROF_VIDEO);
#ifdef DEBUG_VIDEO
draw_screen_scanline(0, 256, 1);
#else
#ifdef FULL_GL
fgl_drawscreen();
#else
draw_screen();
#endif
#endif
PROFILER_STOP(PROF_VIDEO);
}
return 1;
}
static inline int update_scanline(void) {
/* int i; */
irq2taken = 0;
if (irq2control & 0x10) {
if (current_line == irq2start ) {
if (irq2control & 0x80)
irq2start += (irq2pos_value + 3) / 0x180;
irq2taken = 1;
}
}
if (irq2taken) {
if (!skip_this_frame) {
draw_screen_scanline(last_line-21, current_line-20, 0);
}
last_line = current_line;
}
current_line++;
return irq2taken;
}
