From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Sebastian Herbszt" <herbszt@gmx.de>
Subject: Re: [Qemu-devel] Re: Question about KVM and PC speaker
Date: Tue, 12 May 2009 23:06:51 +0200
Message-ID: <6D825FA2F92349029E0C39C9BC4D72C7@FSCPC>
References: <49EF69BC.90300@gmx.de> <49F01C8D.1010203@web.de> <20090423083252.GB5277@const.bordeaux.inria.fr> <49F031C2.5000204@siemens.com> <20090423092546.GF5277@const.bordeaux.inria.fr> <49F035E7.5080906@siemens.com> <49F03A00.8060502@redhat.com> <49F0430A.8010300@siemens.com> <49FF1919.1030909@gmx.de> <49FF5033.1050402@web.de> <20090504205618.GP5889@const.famille.thibault.fr> <49FF5777.8070704@web.de> <4A006268.6040006@linux-fuer-blinde.de> <3D0ED7CD58CF4D37904670A5A85AE2C7@FSCPC> <4A0167B7.2050200@siemens.com> <E97885C6D2F9452787A435FD179215B0@FSCPC> <4A0297D2.4040009@siemens.com> <B0393A87D91D41BCBB63799F330601DC@FSCPC> <4A0925F7.5070806@web.de>
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Cc: "Volker Ruppert" <info@vruppert.de>,
	"Simon Bienlein" <simon@linux-fuer-blinde.de>,
	<Qemu-devel@nongnu.org>, <kvm@vger.kernel.org>
To: "Jan Kiszka" <jan.kiszka@web.de>
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Jan Kiszka wrote:
>> I have implemented the beep for vgabios-6b and it works on bochs but
>> fails on qemu.
>> With "-soundhw pcspk" i should hear it thru the hosts pc speaker, right?
> 
> Yep, that's how it should work. Mind to share your code and tell us
> which test case you used?

FreeDOS floppy with "debug" command and assembly code:
mov ax,0e07
xor bx,bx
int 10

With the modified vgabios (see below) it does beep on bochs on vista,
but not on qemu.

- Sebastian

--- vgabios.c.orig 2009-05-12 22:24:22.000000000 +0200
+++ vgabios.c 2009-05-12 22:24:32.000000000 +0200
@@ -80,6 +80,9 @@
 static void memcpyb();
 static void memcpyw();
 
+static void delay_ticks();
+static void beep();
+
 static void biosfn_set_video_mode();
 static void biosfn_set_cursor_shape();
 static void biosfn_set_cursor_pos();
@@ -1965,7 +1968,7 @@
  switch(car)
   {
    case 7:
-    //FIXME should beep
+    beep();
     break;
 
    case 8:
@@ -3765,6 +3768,57 @@
 ASM_END
 }
 
+  void
+delay_ticks(ticks)
+  Bit16u ticks;
+{
+ASM_START
+  pusha
+  push ds
+  xor dx,dx
+  mov ds,dx
+  mov cx,4[bp]
+  add cx,0x46c
+  adc dx,0x46e
+  sti
+delay_ticks_wait:
+  hlt
+  mov ax,0x46c
+  mov bx,0x46e
+  cmp dx,bx
+  jb delay_ticks_out
+  cmp cx,ax
+  ja delay_ticks_wait
+delay_ticks_out:
+  pop ds
+  popa
+ASM_END
+}
+
+void beep()
+{
+ASM_START
+  pusha
+  mov al,#0xb6
+  out #0x43,al
+  mov al,#0x33
+  out #0x42,al
+  mov al,#0x5
+  out #0x42,al
+  in al,#0x61
+  push ax
+  or al,#0x03
+  out #0x61,al
+  mov cx,#0x4
+  push cx
+  call _delay_ticks
+  pop cx
+  pop ax
+  out #0x61,al
+  popa
+ASM_END
+}
+
 #ifdef DEBUG
 void unimplemented()
 {