Int 21 Fn 62 - Dos 3.0+ - Get Current Psp Address [D]
AH = 62h
Return: BX = segment of PSP for current process
Notes: this function does not use any of the DOS-internal stacks and may
thus be called at any time, even during another INT 21h call
the current PSP is not necessarily the caller's PSP
identical to the undocumented AH=51h
See Also: AH=50h,AH=51h