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authorH. Peter Anvin <hpa@linux.intel.com>2009-03-30 17:53:09 -0700
committerH. Peter Anvin <hpa@linux.intel.com>2009-03-30 17:53:09 -0700
commita1e66d80179262be63c43bb33046bd41069b803d (patch)
treed93cd6ee1490540ff655069e8faa74ef623c4a3a /mbr/isohdpfx.S
parent4f964b57c29db85515b68a3f59a791804aae8aae (diff)
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mbr/*.S: use a symbolic constant for BIOS_kbdflags
Impact: cleanup Use a symbolic constant for BIOS_kbdflags instead of open-coding the address. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'mbr/isohdpfx.S')
-rw-r--r--mbr/isohdpfx.S5
1 files changed, 3 insertions, 2 deletions
diff --git a/mbr/isohdpfx.S b/mbr/isohdpfx.S
index 0e15b11a..0c5b95e6 100644
--- a/mbr/isohdpfx.S
+++ b/mbr/isohdpfx.S
@@ -49,7 +49,8 @@ sectors = (stack-10)
heads = (stack-12)
secpercyl = (stack-16)
-BIOS_page = 0x462
+BIOS_kbdflags = 0x417
+BIOS_page = 0x462
/* gas/ld has issues with doing this as absolute addresses... */
.section ".bootsec", "a", @nobits
@@ -82,7 +83,7 @@ _start:
next:
/* Escape for the user: if Ctrl is pressed, assume drive hd0 */
- testb $0x04, 0x417 /* keyboard control flags: Ctrl pressed */
+ testb $0x04, BIOS_kbdflags /* Ctrl pressed */
jz 1f
movb $0x80, %dl
1: