* use Joliet filesystem (stripping high byte of Unicode)

Critical sections?

? /S option to use D:\ not \\D.\A.\ (and sharing?)

Linux/dosemu locking?
Wfwg sharing?
HD write?
"Mixed format" CDs?

Test multiple buffers/read-ahead.
 I tested MSCDEX v2.25 with default settings (/M:6?) and /M:1, with SMARTDrive,
 and SHSUCDX 3.00 beta 1, with SMARTCDX. Two tests were done: bdiffing a 9M file
 against itself and dir/s/b on a CD with 5135 files. The default MSCDEX bdiff
 was only slightly faster than /M:1 and SHSUCDX (3.30s versus 3.40s). The
 SHSUCDX dir/s/b was half the time of either MSCDEX (0.62s versus 1.24s). Thus,
 there doesn't seem to be any advantage to using multiple buffers.
