Fix APU DMC direct load

src/apu.c

@@ -386,14 +386,15 @@ static int channel_update(nes_apu_Channel* channel) {
 static void nes_apu_run_dmc(nes_apu* apu,
                             nes_apu_Channel* channel,
                             int cycles) {
-    if (channel->length <= 0 || channel->period <= 0) return;
-
+    // Always do this in order to support direct load
     int time = apu->time;
     int delta = channel_update(channel);
     if (delta) {
         blip_add_delta(apu->blip, time, delta);
     }
 
+    if (channel->length <= 0 || channel->period <= 0) return;
+
     while (cycles > 0) {
         int run = cycles;
         if (run > channel->delay) {
@@ -587,7 +588,7 @@ nes_apu_Result nes_apu_run(nes_apu* apu, int cycles) {
         apu->frame_delay -= run;
 
         if (apu->frame_delay <= 0) {
-            APU_LOG("APU: End of quarter frame: %d\n", apu->frame_time_elapsed);
+//            APU_LOG("APU: End of quarter frame: %d\n", apu->frame_time_elapsed);
 
             int end = 0;
             int quarter_frame = 1;
@@ -624,7 +625,7 @@ nes_apu_Result nes_apu_run(nes_apu* apu, int cycles) {
             if (end) {
                 if (0 == apu->frame_reg) {
                     apu->status |= apu_Status_Frame_Int;
-                    APU_LOG("APU: Frame Interrupt @ %d\n", apu->frame_time_elapsed);
+//                    APU_LOG("APU: Frame Interrupt @ %d\n", apu->frame_time_elapsed);
                 }
                 apu->frame = 0;
                 apu->frame_time_elapsed = 0;