aboutsummaryrefslogtreecommitdiffstats
path: root/mbr/adjust.h
diff options
context:
space:
mode:
authorH. Peter Anvin <hpa@zytor.com>2009-04-04 15:32:24 -0700
committerH. Peter Anvin <hpa@zytor.com>2009-04-04 15:32:24 -0700
commitf7b5a2254ab7c8aa87679c1b731d2ea285c22e80 (patch)
tree08e1e00576717e1ca557101164b7e6639e0172a1 /mbr/adjust.h
parentdd51053bbd4a1613d1e3384928a7da7bb164562f (diff)
downloadsyslinux-f7b5a2254ab7c8aa87679c1b731d2ea285c22e80.tar.gz
syslinux-f7b5a2254ab7c8aa87679c1b731d2ea285c22e80.tar.xz
syslinux-f7b5a2254ab7c8aa87679c1b731d2ea285c22e80.zip
mbr: generate normal versions, force-80 versions, and ctrl-80 versions
Produce MBR variants with normal (DL) behavior, force to drive 80 behavior, and force to 80 on Ctrl pressed behavior. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'mbr/adjust.h')
-rw-r--r--mbr/adjust.h53
1 files changed, 53 insertions, 0 deletions
diff --git a/mbr/adjust.h b/mbr/adjust.h
new file mode 100644
index 00000000..42c12a35
--- /dev/null
+++ b/mbr/adjust.h
@@ -0,0 +1,53 @@
+/* -*- asm -*- -----------------------------------------------------------
+ *
+ * Copyright 2009 Intel Corporation; author: H. Peter Anvin
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall
+ * be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * adjust.h
+ *
+ * Macros to adjust the drive number
+ */
+
+#ifndef ADJUST_H
+#define ADJUST_H
+
+#ifdef CTRL_80
+ .macro ADJUST_DRIVE
+ testb $0x04, BIOS_kbdflags
+ jz 1f
+ movb $0x80, %dl
+1:
+ .endm
+#elif defined(FORCE_80)
+ .macro ADJUST_DRIVE
+ movb $0x80, %dl
+ .endm
+#else
+ .macro ADJUST_DRIVE
+ .endm
+#endif
+
+#endif /* ADJUST_H */