I am using Qemu 8.0.0 and this issue happens only when kvm is enabled, tcg initialized the unused bytes to 0xFF as a real machine and works normally, so a question in my mind, does kvm use those umb area for increased performance? If emm386 M5 is used for using area D000-D7FF as frame page, emm386 gives a warning that there is an option rom in this location but it still uses this area, seems like a workaround, i do not know if it will have any side effect
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1180923 Title: unused memory filled with 0x00 instead of 0xFF Status in QEMU: Expired Bug description: Qemu, ever since it was made (so, since 2003), has this problem in DOS (either PC-DOS or MS-DOS and partly Windows 9x) not recognizing the memory available when the memory is filled with 0x00 but when it is filled with 0xFF it gets recognized properly, where should I patch qemu to solve this memory problem? To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1180923/+subscriptions
