Improved documentation for SDL2 and the gui debugger.


git-svn-id: http://svn.code.sf.net/p/bochs/code/trunk@12524 6c8e4198-a580-4521-a02f-c9ae86df1db9
Disable enhanced debugger if gui support is not available.


git-svn-id: http://svn.code.sf.net/p/bochs/code/trunk@12525 6c8e4198-a580-4521-a02f-c9ae86df1db9
fixed compilation when APIC if snot enabled

git-svn-id: http://svn.code.sf.net/p/bochs/code/trunk@12526 6c8e4198-a580-4521-a02f-c9ae86df1db9
compilation fix

git-svn-id: http://svn.code.sf.net/p/bochs/code/trunk@12527 6c8e4198-a580-4521-a02f-c9ae86df1db9
Added definitions from recently published Intel Architecture
Instruction Set Extensions Programming Reference rev22.
Implemented CLWB instruction

git-svn-id: http://svn.code.sf.net/p/bochs/code/trunk@12528 6c8e4198-a580-4521-a02f-c9ae86df1db9