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-rw-r--r--src/include/pc80/ide.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/pc80/ide.h b/src/include/pc80/ide.h
index 96521ece70..6d8be50914 100644
--- a/src/include/pc80/ide.h
+++ b/src/include/pc80/ide.h
@@ -48,7 +48,7 @@ struct harddisk_info {
#define IDE_SECTOR_SIZE 0x200
-#define CDROM_SECTOR_SIZE 0x400
+#define CDROM_SECTOR_SIZE 0x800
#define IDE_BASE0 (0x1F0u) /* primary controller */
#define IDE_BASE1 (0x170u) /* secondary */