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-rw-r--r--menu/syslinux.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/menu/syslinux.c b/menu/syslinux.c
new file mode 100644
index 00000000..40b357f7
--- /dev/null
+++ b/menu/syslinux.c
@@ -0,0 +1,51 @@
+/* -*- c -*- ------------------------------------------------------------- *
+ *
+ * Copyright 2004 Murali Krishnan Ganapathy - All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ * Bostom MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include "syslinux.h"
+#include "biosio.h"
+
+static inline int asm_issyslinux(void)
+{
+ unsigned long eax, ebx, ecx, edx;
+
+ asm("movb $0x30,%%ah ; int $0x21"
+ : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx));
+
+ return (eax == 0x53590000) && (ebx == 0x534c0000) &&
+ (ecx == 0x494e0000) && (edx == 0x55580000);
+}
+
+char issyslinux()
+{
+ return asm_issyslinux();
+}
+
+static inline void asm_runcommand(char *cmd)
+{
+ asm volatile("int $0x22" : : "a" (0x0003), "b" (cmd));
+}
+
+void runcommand(char *cmd)
+{
+ asm_runcommand(cmd);
+}
+
+static inline void asm_gototxtmode()
+{
+ asm volatile("int $0x22" : : "a" (0x0005));
+}
+
+void gototxtmode()
+{
+ asm_gototxtmode();
+}
+