static void alpha_row_update(int scanline) { data16_t *check = &atarigen_alpha[(scanline / 8) * 64 + 42]; /* check for interrupts in the alpha ram */ /* the interrupt occurs on the HBLANK of the 6th scanline following */ if (check < &atarigen_alpha[0x7c0] && (*check & 0x8000)) timer_set(cpu_getscanlineperiod() * 6.9, 0, irq_gen); /* update the playfield and motion objects */ skullxbo_scanline_update(scanline); }
void skullxbo_state::scanline_update(screen_device &screen, int scanline) { /* check for interrupts in the alpha ram */ /* the interrupt occurs on the HBLANK of the 6th scanline following */ int offset = (scanline / 8) * 64 + 42; if (offset < 0x7c0 && (m_alpha_tilemap->basemem_read(offset) & 0x8000)) { int width = screen.width(); attotime period = screen.time_until_pos(screen.vpos() + 6, width * 0.9); m_scanline_timer->adjust(period); } /* update the playfield and motion objects */ skullxbo_scanline_update(scanline); }
static void alpha_row_update(running_machine *machine, int scrnum, int scanline) { UINT16 *check = &atarigen_alpha[(scanline / 8) * 64 + 42]; /* check for interrupts in the alpha ram */ /* the interrupt occurs on the HBLANK of the 6th scanline following */ if (check < &atarigen_alpha[0x7c0] && (*check & 0x8000)) { attotime period = video_screen_get_time_until_pos(scrnum, video_screen_get_vpos(scrnum) + 6, machine->screen[scrnum].width * 0.9); timer_set(period, NULL, 0, irq_gen); } /* update the playfield and motion objects */ skullxbo_scanline_update(scanline); }
static void alpha_row_update(screen_device &screen, int scanline) { skullxbo_state *state = screen.machine().driver_data<skullxbo_state>(); UINT16 *check = &state->m_alpha[(scanline / 8) * 64 + 42]; /* check for interrupts in the alpha ram */ /* the interrupt occurs on the HBLANK of the 6th scanline following */ if (check < &state->m_alpha[0x7c0] && (*check & 0x8000)) { int width = screen.width(); attotime period = screen.time_until_pos(screen.vpos() + 6, width * 0.9); screen.machine().scheduler().timer_set(period, FUNC(irq_gen)); } /* update the playfield and motion objects */ skullxbo_scanline_update(screen.machine(), scanline); }