INT 15 - MultiDOS Plus - MAP SEMAPHORE NAME TO NUMBER
AH = 1Ah
DS:SI -> 8-byte name
Return: AL = status
00h successful
AH = semaphore number (20h-3Fh)
04h out of string space
Notes:  all eight bytes of the name are significant
if the name does not already exist, it is added to the name table and
associated with a free semaphore number
names cannot be destroyed
SeeAlso: AH=1Ch"MultiDOS",AH=1Dh"MultiDOS"

See also: 151B

151A - MultiDOS Plus - MAP SEMAPHORE NAME TO NUMBER