Add initial port of the "open source vga bios" project.
This is an initial import of the code from:
http://www.nongnu.org/vgabios/
The code has been ported from bcc to gcc and gas.
This is an initial import - many functions have not been ported; many
bugs are present.
diff --git a/vgasrc/vgaentry.S b/vgasrc/vgaentry.S
new file mode 100644
index 0000000..48264cf
--- /dev/null
+++ b/vgasrc/vgaentry.S
@@ -0,0 +1,43 @@
+// Rom layout and bios assembler to C interface.
+//
+// Copyright (C) 2009 Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+
+/****************************************************************
+ * Include of 16bit C code
+ ****************************************************************/
+
+ .code16gcc
+.include "out/vgaccode.16.s"
+
+#include "entryfuncs.S" // ENTRY_*
+
+
+/****************************************************************
+ * Rom Header
+ ****************************************************************/
+
+ .section .rom.header
+ .global _rom_header, _rom_header_size, _rom_header_checksum
+_rom_header:
+ .word 0xaa55
+_rom_header_size:
+ .byte 0
+_rom_header_entry:
+ jmp _optionrom_entry
+_rom_header_checksum:
+ .space 22
+
+
+/****************************************************************
+ * Entry points
+ ****************************************************************/
+
+ DECLFUNC _optionrom_entry
+_optionrom_entry:
+ ENTRY_ARG vga_post
+ lretw
+
+ DECL_IRQ_ENTRY_ARG 10