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2008-05-15 Bean <bean123ch@gmail.com>

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* kern/i386/pc/startup.S (grub_console_getkey): Workaround for the
	keyboard hang problem in apple's intel mac.
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bean committed 2008-05-15 11:51:22 +00:00
1 parent 1cf4059a49
commit a079699e97
2 files changed
+22
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kern/i386/pc/startup.S
+17
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@@ -1240,6 +1240,23 @@ FUNCTION(grub_console_getkey)
call prot_to_real
.code16
/*
* Due to a bug in apple's bootcamp implementation, INT 16/AH = 0 would
* cause the machine to hang at the second keystroke. However, we can
* work around this problem by ensuring the presence of keystroke with
* INT 16/AH = 1 before calling INT 16/AH = 0.
*/
1:
movb $1, %ah
int $0x16
jnz 2f
hlt
jmp 1b
2:
movb $0, %ah
int $0x16
movw %ax, %dx /* real_to_prot uses %eax */