GetOSDefault
GetOSDefault Get default video device location and resource number DefOSPtr pb ; pointer to a 2-byte DefOSRec parameter block returns none
GetOSDefault obtains information from parameter RAM concerning what operating system is the default.
pb is the address of a 2-byte DefOSRec structure. It contains the following fields:
Out-In Name Type Size Offset Description
<- sdReserved SignedByte 1 0 Not in use, returns a 0
Notes: The general application of this call is when a partitioned drive is loaded
with more than one operating system.