device: 0.877
debug: 0.622
graphic: 0.592
performance: 0.556
other: 0.411
socket: 0.410
vnc: 0.376
files: 0.364
boot: 0.347
network: 0.338
semantic: 0.334
PID: 0.215
permissions: 0.171
KVM: 0.005

unused memory filled with 0x00 instead of 0xFF
Description of problem:
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?

Refer to
https://bugs.launchpad.net/qemu/+bug/1180923
Steps to reproduce:
1.
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