Record RZX frame only when interrupt acnoldge or framcount >0

src/emulator.c

@@ -1833,7 +1833,11 @@ int main(int argc,char *argv[])
 		if(ordenador.interr==1) {
 			Z80free_INT(&procesador,bus_empty());
 			if ((ordenador.precision==0)||(jump_frames>0)) ordenador.interr=0;
-			if (ordenador.recording_rzx) {if (ordenador.icount != 0xFFFF) rzx_update(&ordenador.icount);ordenador.icount=0;}
+			if (ordenador.recording_rzx)
+				{
+					if (ordenador.icount == 0xFFFF) ordenador.icount=0;
+					else if (test_IFF1(&procesador)||(ordenador.icount>10)) {rzx_update(&ordenador.icount);ordenador.icount=0;}
+				}
 		}
 	}
 	

src/gui_sdl.c

@@ -1952,7 +1952,7 @@ static int do_rzx(int which)
 			ordenador.frames_count_rzx=1;
 			retorno2 = load_rzx();
 			if (retorno2) break; //Error or no file
-			retorno2 = rzx_update(&ordenador.maxicount);
+			retorno2 = rzx_update(&ordenador.maxicount); //The first frame does not generate interrupt
 			if (retorno2 == RZX_FINISHED) {printf("RZX: Playing finished at fisrt frame\n"); break;}
 			//ordenador.cicles_counter=32; //to avoid the interrupt at first frame
 			ordenador.playing_rzx = 1;

src/rzx_lib/rzx.c

@@ -293,6 +293,8 @@ void rzx_close_irb()
   block.start=pos;
   /* signal that we have exited the IRB */
   rzx_status&=~RZX_IRB;
+  INcount=0;
+  INold=0xFFFF;
 }
 
 
@@ -678,7 +680,6 @@ int rzx_update(rzx_u16 *icount)
              rzx_popen(fpos,"wb");
             }
             #endif
-			INcount=0;
 			INold=0xFFFF;
          }
 

src/z80free/Z80free.c

@@ -67,6 +67,11 @@ int Z80free_step(Z80FREE *processor) {
 	return (retval);
 }
 
+byte test_IFF1 (Z80FREE *processor)
+{
+	return processor->IFF1;
+}
+
 int Z80free_ustep(Z80FREE *processor) {
 	
 	static byte opcode,d1;

src/z80free/Z80free.h

@@ -147,6 +147,7 @@ void Z80free_Wr_fake (register word Addr, register byte Value);
 byte Z80free_In (register word Port);
 void Z80free_Out (register word Port, register byte Value);
 void Z80free_Out_fake (register word Port, register byte Value);
+byte test_IFF1 (Z80FREE *);
 
 /* Opcode functions */