[Xen-devel] [PATCH] rombios: fix int13h for floppy disk

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

A floppy on HVM can't be read correctly.
This fix is taken from upstream bochs-2.3.7.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>

diff -r 85a2a54c70c8 tools/firmware/rombios/rombios.c
--- a/tools/firmware/rombios/rombios.c  Wed Oct 29 19:06:52 2008 +0000
+++ b/tools/firmware/rombios/rombios.c  Thu Oct 30 13:07:34 2008 +0900
@@ -7216,7 +7216,7 @@ BX_INFO("floppy: drive>1 || head>1 ...\n
         outb(0x03f5, head);
         outb(0x03f5, sector);
         outb(0x03f5, 2); // 512 byte sector size
-        outb(0x03f5, 0); // last sector number possible on track
+        outb(0x03f5, sector + num_sectors - 1); // last sector to read on track
         outb(0x03f5, 0); // Gap length
         outb(0x03f5, 0xff); // Gap length
 
@@ -7364,7 +7364,7 @@ BX_INFO("floppy: drive>1 || head>1 ...\n
         outb(0x03f5, head);
         outb(0x03f5, sector);
         outb(0x03f5, 2); // 512 byte sector size
-        outb(0x03f5, 0); // last sector number possible on track
+        outb(0x03f5, sector + num_sectors - 1); // last sector to write on 
track
         outb(0x03f5, 0); // Gap length
         outb(0x03f5, 0xff); // Gap length
 

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