Restore code for SCSI requests implemented.
Handle the CD-ROM drive lock status at save/restore.


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12159 6c8e4198-a580-4521-a02f-c9ae86df1db9
convert some defines to enum

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12160 6c8e4198-a580-4521-a02f-c9ae86df1db9