+ if (PicoAHW & PAHW_32X) {
+ Pico32x.sh2irqs |= P32XI_VRES;
+ p32x_update_irls(0);
+ p32x_poll_event(3, 0);
+ p32x_timers_recalc();
+ }
+}
+
+static void p32x_start_blank(void)
+{
+ if (Pico32xDrawMode != PDM32X_OFF && !PicoSkipFrame) {
+ int offs, lines;
+
+ pprof_start(draw);
+
+ offs = 8; lines = 224;
+ if ((Pico.video.reg[1] & 8) && !(PicoOpt & POPT_ALT_RENDERER)) {
+ offs = 0;
+ lines = 240;
+ }
+
+ // XXX: no proper handling of 32col mode..
+ if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0 && // 32x not blanking
+ (Pico.video.reg[12] & 1) && // 40col mode
+ (PicoDrawMask & PDRAW_32X_ON))
+ {
+ int md_bg = Pico.video.reg[7] & 0x3f;
+
+ // we draw full layer (not line-by-line)
+ PicoDraw32xLayer(offs, lines, md_bg);
+ }
+ else if (Pico32xDrawMode != PDM32X_32X_ONLY)
+ PicoDraw32xLayerMdOnly(offs, lines);
+
+ pprof_end(draw);
+ }
+
+ // enter vblank
+ Pico32x.vdp_regs[0x0a/2] |= P32XV_VBLK|P32XV_PEN;
+
+ // FB swap waits until vblank
+ if ((Pico32x.vdp_regs[0x0a/2] ^ Pico32x.pending_fb) & P32XV_FS) {
+ Pico32x.vdp_regs[0x0a/2] &= ~P32XV_FS;
+ Pico32x.vdp_regs[0x0a/2] |= Pico32x.pending_fb;
+ Pico32xSwapDRAM(Pico32x.pending_fb ^ 1);
+ }
+
+ Pico32x.sh2irqs |= P32XI_VINT;
+ p32x_update_irls(0);
+ p32x_poll_event(3, 1);
+}
+
+/* events */
+static void pwm_irq_event(unsigned int now)
+{
+ Pico32x.emu_flags &= ~P32XF_PWM_PEND;
+ p32x_pwm_schedule(now);
+
+ Pico32x.sh2irqs |= P32XI_PWM;
+ p32x_update_irls(0);
+}
+
+static void fillend_event(unsigned int now)
+{
+ Pico32x.vdp_regs[0x0a/2] &= ~P32XV_nFEN;
+ p32x_poll_event(3, 1);
+}
+
+typedef void (event_cb)(unsigned int now);
+
+unsigned int event_times[P32X_EVENT_COUNT];
+static unsigned int event_time_next;
+static event_cb *event_cbs[] = {
+ [P32X_EVENT_PWM] = pwm_irq_event,
+ [P32X_EVENT_FILLEND] = fillend_event,
+};
+
+// schedule event at some time (in m68k clocks)
+void p32x_event_schedule(enum p32x_event event, unsigned int now, int after)
+{
+ unsigned int when = (now + after) | 1;
+
+ elprintf(EL_32X, "new event #%u %u->%u", event, now, when);
+ event_times[event] = when;
+
+ if (event_time_next == 0 || (int)(event_time_next - now) > after)
+ event_time_next = when;
+}
+
+static void run_events(unsigned int until)
+{
+ int oldest, oldest_diff, time;
+ int i, diff;
+
+ while (1) {
+ oldest = -1, oldest_diff = 0x7fffffff;
+
+ for (i = 0; i < P32X_EVENT_COUNT; i++) {
+ if (event_times[i]) {
+ diff = event_times[i] - until;
+ if (diff < oldest_diff) {
+ oldest_diff = diff;
+ oldest = i;
+ }
+ }
+ }
+
+ if (oldest_diff <= 0) {
+ time = event_times[oldest];
+ event_times[oldest] = 0;
+ elprintf(EL_32X, "run event #%d %u", oldest, time);
+ event_cbs[oldest](time);
+ }
+ else if (oldest_diff < 0x7fffffff) {
+ event_time_next = event_times[oldest];
+ break;
+ }
+ else {
+ event_time_next = 0;
+ break;
+ }
+ }
+
+ if (oldest != -1)
+ elprintf(EL_32X, "next event #%d at %u", oldest, event_time_next);
+}
+
+// compare cycles, handling overflows
+// check if a > b
+#define CYCLES_GT(a, b) \
+ ((int)((a) - (b)) > 0)
+// check if a >= b
+#define CYCLES_GE(a, b) \
+ ((int)((a) - (b)) >= 0)
+
+#define sync_sh2s_normal p32x_sync_sh2s
+//#define sync_sh2s_lockstep p32x_sync_sh2s
+
+/* most timing is in 68k clock */
+void sync_sh2s_normal(unsigned int m68k_target)
+{
+ unsigned int now, target, timer_cycles;
+ int cycles, done;
+
+ elprintf(EL_32X, "sh2 sync to %u", m68k_target);
+
+ if (!(Pico32x.regs[0] & P32XS_nRES))
+ return; // rare
+
+ now = msh2.m68krcycles_done;
+ if (CYCLES_GT(now, ssh2.m68krcycles_done))
+ now = ssh2.m68krcycles_done;
+ timer_cycles = now;
+
+ while (CYCLES_GT(m68k_target, now))
+ {
+ if (event_time_next && CYCLES_GE(now, event_time_next))
+ run_events(now);
+
+ target = m68k_target;
+ if (event_time_next && CYCLES_GT(target, event_time_next))
+ target = event_time_next;
+
+ while (CYCLES_GT(target, now))
+ {
+ elprintf(EL_32X, "sh2 exec to %u %d,%d/%d, flags %x", target,
+ target - msh2.m68krcycles_done, target - ssh2.m68krcycles_done,
+ m68k_target - now, Pico32x.emu_flags);
+
+ if (Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL)) {
+ ssh2.m68krcycles_done = target;
+ }
+ else {
+ cycles = target - ssh2.m68krcycles_done;
+ if (cycles > 0) {
+ done = sh2_execute(&ssh2, C_M68K_TO_SH2(ssh2, cycles));
+ ssh2.m68krcycles_done += C_SH2_TO_M68K(ssh2, done);
+
+ if (event_time_next && CYCLES_GT(target, event_time_next))
+ target = event_time_next;
+ }
+ }
+
+ if (Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL)) {
+ msh2.m68krcycles_done = target;
+ }
+ else {
+ cycles = target - msh2.m68krcycles_done;
+ if (cycles > 0) {
+ done = sh2_execute(&msh2, C_M68K_TO_SH2(msh2, cycles));
+ msh2.m68krcycles_done += C_SH2_TO_M68K(msh2, done);
+
+ if (event_time_next && CYCLES_GT(target, event_time_next))
+ target = event_time_next;
+ }
+ }
+
+ now = msh2.m68krcycles_done;
+ if (CYCLES_GT(now, ssh2.m68krcycles_done))
+ now = ssh2.m68krcycles_done;
+ }
+
+ p32x_timers_do(now - timer_cycles);
+ timer_cycles = now;
+ }
+}
+
+#define STEP_68K 24
+
+void sync_sh2s_lockstep(unsigned int m68k_target)
+{
+ unsigned int mcycles;
+
+ mcycles = msh2.m68krcycles_done;
+ if (ssh2.m68krcycles_done < mcycles)
+ mcycles = ssh2.m68krcycles_done;
+
+ while (mcycles < m68k_target) {
+ mcycles += STEP_68K;
+ sync_sh2s_normal(mcycles);
+ }
+}
+
+#define CPUS_RUN(m68k_cycles,s68k_cycles) do { \
+ SekRunM68k(m68k_cycles); \
+ if (Pico32x.emu_flags & P32XF_68KPOLL) \
+ p32x_sync_sh2s(SekCycleCntT + SekCycleCnt); \
+} while (0)
+
+#define PICO_32X
+#include "../pico_cmn.c"
+
+void PicoFrame32x(void)
+{
+ Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank
+ if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0) // no forced blanking
+ Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no palette access
+
+ p32x_poll_event(3, 1);
+
+ PicoFrameStart();
+ PicoFrameHints();
+ elprintf(EL_32X, "poll: %02x", Pico32x.emu_flags);
+}
+
+// calculate multipliers against 68k clock (7670442)
+// normally * 3, but effectively slower due to high latencies everywhere
+// however using something lower breaks MK2 animations
+void Pico32xSetClocks(int msh2_hz, int ssh2_hz)
+{
+ float m68k_clk = (float)(OSC_NTSC / 7);
+ if (msh2_hz > 0) {
+ msh2.mult_m68k_to_sh2 = (int)((float)msh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk);
+ msh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)msh2_hz);
+ }
+ if (ssh2_hz > 0) {
+ ssh2.mult_m68k_to_sh2 = (int)((float)ssh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk);
+ ssh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)ssh2_hz);
+ }