Re: about masm 6.11
The ML.EXE itself has its command line options described at
hxxp://www.geocities.com/riskyfriends/x86/assembly/masm/Masm1.htm.
Moreover, if you are interested in MS manual itself - mainly for DOS programming -, its copy is available at hxxp://webster.cs.ucr.edu/Page_TechDocs/MASMDoc/ (ony figures are 'missing'). (And also for those interested in Win32 programming hxxp://www.movsd.com could be valuable source of information.)
Hope it helps, Jan