INT 16 U - PCIBM PC Tools v6.0+ PCShell API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. - GET PCRUN PARAMETERS
	AX = FFDDh
	BX = 0009h
Return: CF clear if successful
	    DS:SI -> list of pointers (see #00624)


Format of PCIBM PC Tools PCShell returned pointer list:
Offset	Size	Description	(Table 00624)
 00h	WORD	offset of WORD containing ???
 02h	WORD	offset of name of program to execute
 04h	WORD	offset of 80-byte buffer for ???
 06h	WORD	offset of buffer for ??? (length in WORD preceding buffer)
 08h	WORD	offset of buffer for ??? (length in WORD preceding buffer)