The simple menu system doesn't work with serial console

Hello,

I have just get started using pxelinux, and encountered a problem.
The document says the simple menu system supports serial console,
and it works on syslinux 0.2x, but it doesn't seem to work in 0.3x and 0.4x.
I confirmed that this patch fixed the bug.

*** com32/lib/sys/xserial_write.c~      2006-10-30 08:30:35.000000000 +0900

diff --git a/com32/lib/sys/xserial_write.c b/com32/lib/sys/xserial_write.c
index f119083..ebdc953 100644 (file)
--- a/com32/lib/sys/xserial_write.c
+++ b/com32/lib/sys/xserial_write.c
@@ -43,7 +43,8 @@ static void emit(char ch)
 {
   static com32sys_t ireg;      /* Zeroed with the BSS */
 
-  ireg.eax.w[0] = 0x0400 | (unsigned char)ch;
+  ireg.eax.b[1] = 0x04;
+  ireg.edx.b[0] = ch;
 
   __intcall(0x21, &ireg, NULL);
 }