1 files changed, 51 insertions, 0 deletions
diff --git a/sys/boot/i386/mbr/mbr.m4 b/sys/boot/i386/mbr/mbr.m4
new file mode 100644
index 0000000..768e262
--- /dev/null
+++ b/sys/boot/i386/mbr/mbr.m4
@@ -0,0 +1,51 @@
+#
+# Copyright (c) 1999 Robert Nordier
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms are freely
+# permitted provided that the above copyright notice and this
+# paragraph and the following disclaimer are duplicated in all
+# such forms.
+#
+# This software is provided "AS IS" and without any express or
+# implied warranties, including, without limitation, the implied
+# warranties of merchantability and fitness for a particular
+# purpose.
+#
+
+#	$Id: $
+
+define(_al,0x0)dnl
+define(_cl,0x1)dnl
+define(_dl,0x2)dnl
+define(_bl,0x3)dnl
+define(_ah,0x4)dnl
+define(_ch,0x5)dnl
+define(_dh,0x6)dnl
+define(_bh,0x7)dnl
+
+define(_ax,0x0)dnl
+define(_cx,0x1)dnl
+define(_dx,0x2)dnl
+define(_bx,0x3)dnl
+define(_sp,0x4)dnl
+define(_bp,0x5)dnl
+define(_si,0x6)dnl
+define(_di,0x7)dnl
+
+define(_bx_si,0x0)dnl
+define(_bx_di,0x1)dnl
+define(_bp_si,0x2)dnl
+define(_bp_di,0x3)dnl
+define(_si_,0x4)dnl
+define(_di_,0x5)dnl
+define(_bp_,0x6)dnl
+define(_bx_,0x7)dnl
+
+define(cmpbr0,`.byte 0x38; .byte ($1 << 0x3) | $2')dnl
+define(cmpwi2,`.byte 0x81; .byte 0xb8 | $3; .word $2; .word $1')dnl
+define(movb0r,`.byte 0x8a; .byte ($2 << 0x3) | $1')dnl
+define(movb1r,`.byte 0x8a; .byte 0x40 | ($3 << 0x3) | $2; .byte $1')dnl
+define(movw1r,`.byte 0x8b; .byte 0x40 | ($3 << 0x3) | $2; .byte $1')dnl
+define(movwir,`.byte 0xb8 | $2; .word $1')dnl
+define(jmpnwi,`.byte 0xe9; .word $1 - . - 0x2')dnl