Re: Minor request for enhancement: "beep on halt"

Stephen Harris (sweh@spuddy.mew.co.uk)
Sun, 13 Dec 1998 21:27:45 GMT

Well, Alan Cox reckons my original patch was in the right place, so here's
a version against 2.1.131. This is a lot better, because the shutdown
code has been seperated out between the architectures, so I'm not too worried
that this is intel only code... after all, it now lives in arch/i386 :-)

diff -cr linux-131/Documentation/Configure.help test-kernel/Documentation/Configure.help
*** linux-131/Documentation/Configure.help Wed Dec 2 03:05:05 1998
--- test-kernel/Documentation/Configure.help Sun Dec 13 20:22:58 1998
***************
*** 106,111 ****
--- 106,120 ----
If you are not sure, say Y; apart from resulting in a 45 KB bigger
kernel, it won't hurt.

+ Repeated audio beeps on halt
+ CONFIG_BEEP_ON_HALT
+ On a system halt taking place the system will beep at 750Hz in a
+ one second on, one second off cycle. This allows headless systems
+ to indicate that the system is halted. Has no effect on the normal
+ running of the kernel.
+
+ If APM is enabled with power off on halt option then this has no effect.
+
Normal PC floppy disk support
CONFIG_BLK_DEV_FD
If you want to use the floppy disk drive(s) of your PC under Linux,
diff -cr linux-131/arch/i386/config.in test-kernel/arch/i386/config.in
*** linux-131/arch/i386/config.in Sun Nov 29 04:32:10 1998
--- test-kernel/arch/i386/config.in Sun Dec 13 20:09:19 1998
***************
*** 20,25 ****
--- 20,28 ----
if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
bool 'MTRR (Memory Type Range Register) support' CONFIG_MTRR
fi
+
+ bool 'Repeated audio beeps on halt' CONFIG_BEEP_ON_HALT
+
endmenu

mainmenu_option next_comment
diff -cr linux-131/arch/i386/kernel/process.c test-kernel/arch/i386/kernel/process.c
*** linux-131/arch/i386/kernel/process.c Tue Dec 1 19:28:24 1998
--- test-kernel/arch/i386/kernel/process.c Sun Dec 13 20:11:49 1998
***************
*** 366,371 ****
--- 366,384 ----

void machine_halt(void)
{
+ #if defined(CONFIG_BEEP_ON_HALT)
+ while (1) {
+ /* This is stolen from drivers/char/vt.c */
+ /* beep is 750Hz */
+ outb_p(inb_p(0x61)|3,0x61);
+ outb_p(0xB6,0x43);
+ outb_p(54,0x42);
+ outb_p(6,0x42);
+ udelay(1000000L);
+ outb_p(inb_p(0x61)&0xFC,0x61);
+ udelay(1000000L);
+ }
+ #endif
}

void machine_power_off(void)

-- 
                                 Stephen Harris
                 sweh@spuddy.mew.co.uk   http://www.spuddy.org/
      The truth is the truth, and opinion just opinion.  But what is what?
       My employer pays to ignore my opinions; you get to do it for free.      
  * Meeeeow ! Call  Spud the Cat on > 01268 515441 < for free Usenet access *


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