X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=gp2x%2F940ctl.c;h=bcbb09b8893cb08c5748d728225b40e11c5107bd;hb=17fa1e44f6759e1060af69b9d3a452a89554f87b;hp=48ebfa033df494b25a757b352f7a4a0185e4c9db;hpb=dfa4c846f44d3717288758b38d267d157858aaf7;p=libpicofe.git

diff --git a/gp2x/940ctl.c b/gp2x/940ctl.c
index 48ebfa0..bcbb09b 100644
--- a/gp2x/940ctl.c
+++ b/gp2x/940ctl.c
@@ -20,6 +20,7 @@
 extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */
 extern volatile unsigned long  *gp2x_memregl;
 
+extern int reset_timing;
 static unsigned char *shared_mem = 0;
 static _940_data_t *shared_data = 0;
 _940_ctl_t *shared_ctl = 0;
@@ -99,7 +100,13 @@ int YM2612Write_940(unsigned int a, unsigned int v)
 
 	switch( a ) {
 	case 0:	/* address port 0 */
+		if (!addr_A1 && ST_address == v)
+			return 0;	/* address already selected, don't send this command to 940 */
 		ST_address = v;
+		/* don't send DAC or timer related address changes to 940 */
+		if (!addr_A1 && (v & 0xf0) == 0x20 &&
+			(v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))
+				return 0;
 		addr_A1 = 0;
 		//ret=0;
 		break;
@@ -162,6 +169,8 @@ int YM2612Write_940(unsigned int a, unsigned int v)
 		break;
 
 	case 2:	/* address port 1 */
+		if (addr_A1 && ST_address == v)
+			return 0;
 		ST_address = v;
 		addr_A1 = 1;
 		//ret=0;
@@ -186,7 +195,7 @@ int YM2612Write_940(unsigned int a, unsigned int v)
 				shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;
 			}
 		} else {
-			printf("warning: writebuff_ptr > 2047\n");
+			printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);
 		}
 	}
 
@@ -581,6 +590,7 @@ void mp3_start_play(FILE *f, int pos) // pos is 0-1023
 			if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);
 			add_job_940(JOB940_INVALIDATE_DCACHE);
 		}
+		reset_timing = 1;
 	}
 
 	// seek..