[FAST486]
- Invalid extended opcodes get a special handler, so that we are not anymore obliged to check for NULL before running an extended opcode.
- To quickly retrieve extended opcode numbers, add their numbers in regard to their handlers.

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@64745 97493ccd-5924-5043-b1f5-66cb403b36ce
Forgot this file :)

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@64746 97493ccd-5924-5043-b1f5-66cb403b36ce
[NTVDM]: Zero-fill memory with RtlZeroMemory (that exists also in NT mode), and use sizeof(object) instead of sizeof(type_of_object).

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@64747 97493ccd-5924-5043-b1f5-66cb403b36ce
[NTVDM]: Implement double-width and double-height separately; used when eg. an app displays in 640*180, etc...

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@64748 97493ccd-5924-5043-b1f5-66cb403b36ce