The problem is specifically about the first 1 MB of RAM. Also, another related problem is that in all Qemu 1.x versions, segments E000-EFFF, possibly even D000-DFFF, get used by an Option RAM that can't be removed. This drastically reduces the amount of available upper memory.
-- 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: New 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
