Re: MIDI input

[x.zupftom@web.de]

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Hi all,

Stas Sergeev sent me a patch offlist that fixed my problem (see attachment). Thank you so much, Stas! Would anyone be so kind and apply it to the repository?

Thomas W.

P.S.: I thought I already sent this to the list some weeks ago, but the typical "reply vs. reply all" error happened.
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Index: src/dosext/sound/sound.c
===================================================================
--- src/dosext/sound/sound.c	(revision 1864)
+++ src/dosext/sound/sound.c	(working copy)
@@ -660,6 +660,8 @@
     S_printf("MPU401: Read data port = 0x%02x, %i bytes still in queue\n",
       r,Q_HOLDS(mpu401_info.data));
     sb_deactivate_irq(SB_IRQ_MIDI);
+    if (Q_HOLDS(mpu401_info.data))
+      sb_activate_irq(SB_IRQ_MIDI);
     break;
   case 1:
      /* Read status port */
Index: src/base/init/config.c
===================================================================
--- src/base/init/config.c	(revision 1864)
+++ src/base/init/config.c	(working copy)
@@ -302,9 +302,9 @@
 	}
     }
 
-    (*print)("\nSOUND:\nsb_base 0x%x\nsb_dma %d\nsb_hdma %d\nsb_irq %d\n"
+    (*print)("\nSOUND:\nengine %d\nsb_base 0x%x\nsb_dma %d\nsb_hdma %d\nsb_irq %d\n"
 	"mpu401_base 0x%x\nsb_dsp \"%s\"\nsb_mixer \"%s\"\nsound_driver \"%s\"\n",
-        config.sb_base, config.sb_dma, config.sb_hdma, config.sb_irq,
+        config.sound, config.sb_base, config.sb_dma, config.sb_hdma, config.sb_irq,
 	config.mpu401_base, config.sb_dsp, config.sb_mixer, config.sound_driver);
     (*print)("\nSOUND_OSS:\noss_min_frags 0x%x\noss_max_frags 0x%x\n"
 	     "oss_stalled_frags 0x%x\noss_do_post %d\noss_min_extra_frags 0x%x\n"
Index: src/base/dev/sb16/sb16.h
===================================================================
--- src/base/dev/sb16/sb16.h	(revision 1864)
+++ src/base/dev/sb16/sb16.h	(working copy)
@@ -83,6 +83,7 @@
 #define DSP_OUT_FIFO_TRIGGER 32
 #define DSP_IN_FIFO_TRIGGER 32
 #define MIDI_FIFO_SIZE 32
+#define MPU401_IN_FIFO_TRIGGER 1
   struct rng_s midi_fifo_in;
   struct rng_s midi_fifo_out;
   void *dspio;
Index: src/base/dev/sb16/sb16.c
===================================================================
--- src/base/dev/sb16/sb16.c	(revision 1864)
+++ src/base/dev/sb16/sb16.c	(working copy)
@@ -323,6 +323,14 @@
     return (sb.mixer_regs[0x82] & type);
 }
 
+static void sb_request_irq(int type)
+{
+    if (type & SB_IRQ_DSP)
+	pic_request(pic_irq_list[sb_get_dsp_irq_num()]);
+    if (type & SB_IRQ_MPU401)
+	pic_request(pic_irq_list[CONFIG_MPU401_IRQ]);
+}
+
 static void sb_activate_irq(int type)
 {
     S_printf("SB: Activating irq type %d\n", type);
@@ -330,10 +338,7 @@
 	S_printf("SB: Warning: Interrupt already active!\n");
 	return;
     }
-    if (type & SB_IRQ_DSP)
-	pic_request(pic_irq_list[sb_get_dsp_irq_num()]);
-    if (type & SB_IRQ_MPU401)
-	pic_request(pic_irq_list[CONFIG_MPU401_IRQ]);
+    sb_request_irq(type);
     sb.mixer_regs[0x82] |= type;
 }
 
@@ -351,6 +356,14 @@
     }
 }
 
+static void sb_run_irq(int type)
+{
+    if (!sb_irq_active(type))
+	return;
+    S_printf("SB: Run irq type %d\n", type);
+    sb_request_irq(type);
+}
+
 void sb_handle_dma(void)
 {
     sb.dma_count--;
@@ -528,7 +541,7 @@
 		/* for High-Speed mode reset means only exit High-Speed */
 		S_printf("SB: Reset called, exiting High-Speed DMA mode\n");
 		sb.dma_cmd = 0;
-	    } else if (sb_midi_input() && sb_midi_uart()) {
+	    } else if (sb_midi_uart()) {
 		S_printf("SB: Reset called, exiting UART midi mode\n");
 		sb.midi_cmd = 0;
 	    } else {
@@ -1134,7 +1147,7 @@
 
 	/* == DSP == */
     case 0x0C:			/* dsp write register */
-	if (sb_midi_input() && sb_midi_uart()) {
+	if (sb_midi_uart()) {
 	    sb_write_midi(value);
 	    break;
 	}
@@ -1200,8 +1213,11 @@
 	rng_get(&sb.dsp_queue, &value);
 	S_printf("SB: Read 0x%x from SB DSP\n", value);
 	result = value;
-	if (sb_midi_input() && sb_midi_int())
-	    sb_deactivate_irq(SB_IRQ_MIDI);
+	if (sb_midi_int()) {
+	    if (!rng_count(&sb.dsp_queue))
+		sb_deactivate_irq(SB_IRQ_MIDI);
+	    sb_run_irq(SB_IRQ_MIDI);
+	}
 	break;
 
     case 0x0C:			/* DSP Write Buffer Status */
@@ -1284,6 +1300,7 @@
 	     r, rng_count(&sb.midi_fifo_in));
 	if (!rng_count(&sb.midi_fifo_in))
 	    sb_deactivate_irq(SB_IRQ_MPU401);
+	sb_run_irq(SB_IRQ_MPU401);
 	break;
     case 1:
 	/* Read status port */
@@ -1357,8 +1374,10 @@
 	    process_sb_midi_input();
 	if (sb_midi_int())
 	    sb_activate_irq(SB_IRQ_MIDI);
-    } else if (sb.mpu401_uart)
-	sb_activate_irq(SB_IRQ_MPU401);
+    } else if (sb.mpu401_uart) {
+	if (rng_count(&sb.midi_fifo_in) == MPU401_IN_FIFO_TRIGGER)
+	    sb_activate_irq(SB_IRQ_MPU401);
+    }
 }
 
 void run_new_sb(void)
@@ -1382,7 +1401,7 @@
     io_device.handler_name = "Midi Emulation";
     io_device.start_addr = config.mpu401_base;
     io_device.end_addr = config.mpu401_base + 0x001;
-    io_device.irq = EMU_NO_IRQ;
+    io_device.irq = CONFIG_MPU401_IRQ;
     io_device.fd = -1;
     if (port_register_handler(io_device, 0) != 0)
 	error("MPU-401: Cannot registering port handler\n");