INT 68 - APPC/PCIBM PC - TRANSACTION PROCESSING
	AH = 04h
	DS:DX -> control block (see #03702)
Return: control block updated


Format of APPC/PCIBM PC control block:
Offset	Size	Description	(Table 03702)
 00h 12 BYTEs	reserved
 0Ch	WORD	verb (action)
		2500h TP_ENDED
		2900h TP_VALID
 0Eh  6 BYTEs	00h
 14h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	(big-endian) return code (see #03668)
 18h	WORD	00h
 1Ah  8 BYTEs	(big-endian) TP_ID
 22h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> CREATE_TP record (only if verb = 2900h)