*** sb16_midi.c.orig	Wed Jan  8 03:01:02 1997
--- sb16_midi.c	Wed Jan  8 03:06:00 1997
***************
*** 278,289 ****
--- 278,317 ----
    return ok;
  }
  
+ /*
+   NOTICE: this function is imported OSS/Free 3.8 for Linux
+           this function initializes MIDI port for Vibra chip
+ */
+ static void
+ sb16_set_mpu_port (struct address_info *hw_config)
+ {
+ /*
+  * This routine initializes new MIDI port setup register of SB Vibra (CT2502).
+  */
+   unsigned char   bits = sb_getmixer (0x84) & ~0x06;
+ 
+   switch (hw_config->io_base)
+   {
+     case 0x300:
+       sb_setmixer (0x84, bits | 0x04);
+       break;
+ 
+     case 0x330:
+       sb_setmixer (0x84, bits | 0x00);
+       break;
+ 
+     default:
+       sb_setmixer (0x84, bits | 0x02);    /* Disable MPU */
+ 	printk ("SB16: Invalid MIDI I/O port %x\n", hw_config->io_base);
+     }
+ }
  
  int
  probe_sb16midi (struct address_info *hw_config)
  {
    int             ok = 0;
    extern int      sbc_major;
+   extern int      sbc_minor;
  
    if (sbc_major < 4)
      return 0;			/* Not a SB16 */
***************
*** 292,297 ****
--- 320,328 ----
  
    if (sb_get_irq () < 0)
      return 0;
+ 
+   if (sbc_minor > 12) /* initialize MIDI port for Vibra chip */
+     sb16_set_mpu_port(hw_config);
  
    ok = reset_sb16midi ();